2021 GMC Sierra 2500 HD Maintenance
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Maintain Your GMC Sierra 2500 HD
Don’t let unexpected car trouble get the best of you. Stay ahead of potential problems and schedule a routine GMC Sierra 2500 HD maintenance appointment today.
2021 GMC Sierra 2500 HD Maintenance Schedule
What is the manufacturer recommended maintenance schedule for a 2021 GMC Sierra 2500 HD? Find maintenance info for your vehicle.
7,500 Miles
Maintenance check at 7500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
15,000 Miles
Maintenance check at 15000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Engine Coolant
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
30,000 Miles
Maintenance check at 30000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
37,500 Miles
Maintenance check at 37500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
45,000 Miles
Maintenance check at 45000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Evap Emission Control System
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
52,500 Miles
Maintenance check at 52500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
60,000 Miles
Maintenance check at 60000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
67,500 Miles
Maintenance check at 67500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Accelerator Pedal
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
75,000 Miles
Maintenance check at 75000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
82,500 Miles
Maintenance check at 82500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
90,000 Miles
Maintenance check at 90000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Starter Safety Switch
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
97,500 Miles
Maintenance check at 97500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Spark Plug Wires
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Spark Plugs
- RESET Oil Life Monitor
- ROTATE Tires
105,000 Miles
Maintenance check at 105000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
112,500 Miles
Maintenance check at 112500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
120,000 Miles
Maintenance check at 120000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Accelerator Pedal
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
127,500 Miles
Maintenance check at 127500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
135,000 Miles
Maintenance check at 135000 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- REPLACE Cabin Air Filter
- RESET Oil Life Monitor
- ROTATE Tires
142,500 Miles
Maintenance check at 142500 miles for your 2021 GMC Sierra 2500 HD SLE
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
150,000 Miles
Maintenance check at 150000 miles for your 2021 GMC Sierra 2500 HD SLE
- DRAIN & REFILL Engine Coolant
- INSPECT Accelerator Pedal
- INSPECT Accessory Drive Belt
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
7,500 Miles
Maintenance check at 7500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Brake System
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
15,000 Miles
Maintenance check at 15000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
30,000 Miles
Maintenance check at 30000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
37,500 Miles
Maintenance check at 37500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
45,000 Miles
Maintenance check at 45000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
52,500 Miles
Maintenance check at 52500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
60,000 Miles
Maintenance check at 60000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
67,500 Miles
Maintenance check at 67500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Leakage
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
- LUBRICATE Body Components
75,000 Miles
Maintenance check at 75000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
82,500 Miles
Maintenance check at 82500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
90,000 Miles
Maintenance check at 90000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Fuel System
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
97,500 Miles
Maintenance check at 97500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Spark Plug Wires
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Spark Plugs
- RESET Oil Life Monitor
- ROTATE Tires
105,000 Miles
Maintenance check at 105000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
112,500 Miles
Maintenance check at 112500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
120,000 Miles
Maintenance check at 120000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
127,500 Miles
Maintenance check at 127500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
135,000 Miles
Maintenance check at 135000 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
142,500 Miles
Maintenance check at 142500 miles for your 2021 GMC Sierra 2500 HD Denali
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Engine Oil & Filter
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
150,000 Miles
Maintenance check at 150000 miles for your 2021 GMC Sierra 2500 HD Denali
- DRAIN & REFILL Engine Coolant
- INSPECT Accelerator Pedal
- INSPECT Accessory Drive Belt
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
7,500 Miles
Maintenance check at 7500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
15,000 Miles
Maintenance check at 15000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
30,000 Miles
Maintenance check at 30000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
37,500 Miles
Maintenance check at 37500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
45,000 Miles
Maintenance check at 45000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- REPLACE Air Cleaner/Element
- RESET Oil Life Monitor
- ROTATE Tires
52,500 Miles
Maintenance check at 52500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
60,000 Miles
Maintenance check at 60000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
67,500 Miles
Maintenance check at 67500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
75,000 Miles
Maintenance check at 75000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Exhaust System & Heat Shields
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
82,500 Miles
Maintenance check at 82500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
90,000 Miles
Maintenance check at 90000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
97,500 Miles
Maintenance check at 97500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Air Cleaner Element
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Spark Plug Wires
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Spark Plugs
- RESET Oil Life Monitor
- ROTATE Tires
105,000 Miles
Maintenance check at 105000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
112,500 Miles
Maintenance check at 112500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
120,000 Miles
Maintenance check at 120000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Sunroof Rails
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
127,500 Miles
Maintenance check at 127500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
135,000 Miles
Maintenance check at 135000 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
142,500 Miles
Maintenance check at 142500 miles for your 2021 GMC Sierra 2500 HD Base
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
150,000 Miles
Maintenance check at 150000 miles for your 2021 GMC Sierra 2500 HD Base
- DRAIN & REFILL Engine Coolant
- INSPECT Accelerator Pedal
- INSPECT Accessory Drive Belt
- INSPECT Air Cleaner Element
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
7,500 Miles
Maintenance check at 7500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
15,000 Miles
Maintenance check at 15000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
30,000 Miles
Maintenance check at 30000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
37,500 Miles
Maintenance check at 37500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Accelerator Pedal
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
45,000 Miles
Maintenance check at 45000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
52,500 Miles
Maintenance check at 52500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
60,000 Miles
Maintenance check at 60000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Parking Brake
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
67,500 Miles
Maintenance check at 67500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
75,000 Miles
Maintenance check at 75000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
82,500 Miles
Maintenance check at 82500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
90,000 Miles
Maintenance check at 90000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Engine Coolant
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
97,500 Miles
Maintenance check at 97500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Spark Plug Wires
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Spark Plugs
- RESET Oil Life Monitor
- ROTATE Tires
105,000 Miles
Maintenance check at 105000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- RESET Oil Life Monitor
- ROTATE Tires
- LUBRICATE Body Components
112,500 Miles
Maintenance check at 112500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
120,000 Miles
Maintenance check at 120000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
127,500 Miles
Maintenance check at 127500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
135,000 Miles
Maintenance check at 135000 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Restraint System Components
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
142,500 Miles
Maintenance check at 142500 miles for your 2021 GMC Sierra 2500 HD SLT
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
150,000 Miles
Maintenance check at 150000 miles for your 2021 GMC Sierra 2500 HD SLT
- DRAIN & REFILL Engine Coolant
- INSPECT Accelerator Pedal
- INSPECT Accessory Drive Belt
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
7,500 Miles
Maintenance check at 7500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- ROTATE Tires
- RESET Oil Life Monitor
15,000 Miles
Maintenance check at 15000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
30,000 Miles
Maintenance check at 30000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
37,500 Miles
Maintenance check at 37500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
45,000 Miles
Maintenance check at 45000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
52,500 Miles
Maintenance check at 52500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
60,000 Miles
Maintenance check at 60000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
67,500 Miles
Maintenance check at 67500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- INSPECT Leakage
- LUBRICATE Body Components
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
75,000 Miles
Maintenance check at 75000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
82,500 Miles
Maintenance check at 82500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
90,000 Miles
Maintenance check at 90000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
97,500 Miles
Maintenance check at 97500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Spark Plug Wires
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Spark Plugs
- RESET Oil Life Monitor
- ROTATE Tires
105,000 Miles
Maintenance check at 105000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
112,500 Miles
Maintenance check at 112500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
120,000 Miles
Maintenance check at 120000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
127,500 Miles
Maintenance check at 127500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
135,000 Miles
Maintenance check at 135000 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Evap Emission Control System
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Air Cleaner/Element
- REPLACE Automatic Transmission Filter
- REPLACE Automatic Transmission Fluid
- REPLACE Cabin Air Filter
- REPLACE Fuel Filter
- REPLACE Transfer Case Fluid
- RESET Oil Life Monitor
- ROTATE Tires
142,500 Miles
Maintenance check at 142500 miles for your 2021 GMC Sierra 2500 HD AT4
- INSPECT Accelerator Pedal
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Engine Oil & Filter
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- RESET Oil Life Monitor
- ROTATE Tires
150,000 Miles
Maintenance check at 150000 miles for your 2021 GMC Sierra 2500 HD AT4
- DRAIN & REFILL Engine Coolant
- INSPECT Accelerator Pedal
- INSPECT Accessory Drive Belt
- INSPECT Air Cleaner Element
- INSPECT Automatic Shiftlock And Park/Neutral Switch
- INSPECT Brake System
- INSPECT Engine Coolant
- INSPECT Engine Oil & Filter
- INSPECT Exhaust System & Heat Shields
- INSPECT Fuel System
- INSPECT Gas Strut
- INSPECT Ignition Transaxle Lock
- INSPECT Leakage
- INSPECT Parking Brake
- INSPECT Restraint System Components
- INSPECT Starter Safety Switch
- INSPECT Sunroof Rails
- INSPECT Suspension & Steering Components
- INSPECT Window Washer Fluid Level
- INSPECT Wiper Blades
- LUBRICATE Body Components
- REPLACE Automatic Transmission Filter
- REPLACE Hood Support Gas Strut
- RESET Oil Life Monitor
- ROTATE Tires
2021 GMC Sierra 2500 HD Maintenance Schedule
What is the maintenance schedule for the 2021 GMC Sierra 2500 HD?
Your Guide to 2021 GMC Sierra 2500 HD Scheduled Maintenance
When it comes to your GMC Sierra 2500 HD, how you treat your car makes all the difference in its performance. With the right maintenance at the right time, your Sierra 2500 HD has a good chance of hitting 200,000 miles or more. So, you want to care for your car, but you’re not sure when to get certain services. It can be overwhelming, but fortunately, there’s a resource that takes the guesswork out of routine Sierra 2500 HD maintenance. Just follow your 2021 GMC Sierra 2500 HD maintenance schedule!
This recommended maintenance schedule is written by the auto manufacturer, GMC themselves. Scheduled maintenance services can vary depending on driving conditions, climate, and other factors; in most cases, though, recommended maintenance will consist of services like oil changes, tire rotations, brake pad replacement, filter changes, and fluid checks and exchanges. Staying on track with routine service appointments can help your Sierra 2500 HD perform better, increase your vehicle safety, and prevent common 2021 GMC Sierra 2500 HD problems.
Essential Maintenance to Keep Your GMC Sierra 2500 HD Running Newer, Longer
Come to Firestone Complete Auto Care for manufacturer-recommended routine maintenance on your 2021 GMC Sierra 2500 HD and our technicians will jump right in with a Courtesy Check. A Courtesy Check helps "set the stage" for your service and catch any small problems before they turn into big repairs. Each Courtesy Check includes a free battery test and an inspection of your Sierra 2500 HD's windshield wiper blades, head and tail lights, filters, fluid levels, tires, and alignment.
Could your 2021 GMC Sierra 2500 HD be ready for a new battery? In general, car batteries only last three to five years. Depending on the climate where you live and your habits while driving, your Sierra 2500 HD may need a replacement battery sooner. Taking short trips or exposing your car to extreme temperatures (like in the dead of winter or heat of summer) could reduce the life expectancy of your GMC Sierra 2500 HD battery. Sure, you could wait until your battery is completely dead, but it’s a much wiser decision to replace it before you need to. Otherwise, you may find yourself (and your trusty Sierra 2500 HD) stuck in the middle of nowhere. Your GMC Sierra 2500 HD won't be going anywhere without a strong battery.
In addition to maintaining a strong battery, investing in regular oil changes can help your 2021 GMC Sierra 2500 HD's engine run smoother. See GMC's recommendations for oil change intervals for your 2021 Sierra 2500 HD in the chart at the top of this page. Keep in mind that your oil change interval could be different given your driving style and climate. A Firestone Complete Auto Care technician will be happy to help you determine the best oil change frequency for your car’s needs. Not sure what type of oil to use for your 2021 GMC Sierra 2500 HD? We can help with that, too!
Periodic service to the steering system in your GMC Sierra 2500 HD can improve ride comfort and help you maintain control of your vehicle. Don’t let a misalignment or pulling steering wheel put you in danger. Trust our technicians to inspect system components and if needed, provide the appropriate GMC Sierra 2500 HD steering and suspension services. This can include things like power steering fluid replacement, wheel alignment adjustments, replacement of struts and wheel bearings, and ball joint lubrication. Prevent damage or premature wear and tear on your GMC Sierra 2500 HD's steering system with regular maintenance.
If you skip recommended GMC Sierra 2500 HD services, you (and your engine) could quickly lose your cool when there's a problem on the road–especially if that problem is an overheated engine or broken A/C. Don’t sweat it, though! Our technicians can take care of those issues, too. At Firestone Complete Auto Care, we have what it takes to provide top-notch service for your GMC Sierra 2500 HD engine heating and cooling systems, as well as your air conditioning. Is it time to replace the radiator in your GMC Sierra 2500 HD? We got it. Is your A/C blowing hot air? We'll fix it. Firestone Complete Auto Care is your spot for 2021 GMC Sierra 2500 HD maintenance.
Don’t wait until something goes wrong with your car. Visit your nearest location for proactive maintenance today.
2021 GMC Sierra 2500 HD Maintenance Questions
Take an active role in maintaining your 2021 GMC Sierra 2500 HD. Get answers to common GMC Sierra 2500 HD maintenance questions and learn more about caring for your vehicle.
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What should I do after hitting a pothole in my GMC Sierra 2500 HD? You know your GMC Sierra 2500 HD better than anyone else, so you’ll know if something doesn’t feel right while driving. Have your alignment checked (and adjusted if necessary) as soon as you notice a pulling steering wheel to prevent suspension damage or uneven tire wear.
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When should I use high mileage oil in my GMC Sierra 2500 HD? Do you have more than 75,000 miles on your GMC Sierra 2500 HD? If so, request to switch to high mileage oil at your next oil change. This type of oil is specially formulated to keep aging engine parts in the best possible condition.
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Can GMC dashboard warning lights wait? It's better to get them addressed as soon as possible. An illuminated dashboard light means something in your vehicle isn't functioning like it should. Letting problems linger can mean bad news for your GMC Sierra 2500 HD, so be sure to take your car in for service as soon as you notice an illuminated dashboard light