Why does my Sierra 3500 HD’s check engine light come on when I start it?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Sierra 3500 HD testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why is my GMC Sierra 3500 HD making engine noise?

Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my GMC Sierra 3500 HD engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I use water in my GMC Sierra 3500 HD radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause the engine in my Sierra 3500 HD to suddenly stop?

Reasons your Sierra 3500 HD car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who can repair my GMC Sierra 3500 HD engine?

Your local Firestone Complete Auto Care offers GMC Sierra 3500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 2018 GMC Sierra 3500 HD

Learn about

2018 GMC Sierra 3500 HD Trim Options

Select your GMC Sierra 3500 HD trim level to learn more about GMC-recommended engine repair. Even GMC Sierra 3500 HD parts will get older and change.

V8/6.0L

V8/6.6L

Repairs for Your 2018 GMC Sierra 3500 HD

Nothing lasts forever. Even your GMC Sierra 3500 HD’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 2018 GMC Sierra 3500 HD services.

We Care for GMC Sierra 3500 HD Engines

The GMC Sierra 3500 HD is respected for its reliability. You probably thought about that when you got it. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. When they do, you might find yourself searching for 2018 GMC Sierra 3500 HD engine repair or replacement parts. That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC Sierra 3500 HD engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

My 2018 GMC Sierra 3500 HD Check Engine Light Is On

If your Sierra 3500 HD check engine light is on, it’s time to get it looked at. A steady or flashing check engine light could signal a serious issue with your vehicle's ignition, Potential causes may include a faulty oxygen sensor, damaged spark plug, issues with your catalytic converter, or an engine vacuum leak, to name a few possible causes. Bring your Sierra 3500 HD in for an on-board diagnostic check and our expert techs will get the root of the problem. Other signs it's time for GMC Sierra 3500 HD engine service might include burning smells, or a sinking feeling that something’s wrong.

Engine Repairs for Your 2018 Sierra 3500 HD

When your GMC Sierra 3500 HD engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We never do any work without your sign-off. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We seek to give you all the info you need to make a smart decision about our services. By choosing Firestone Complete Auto Care for Sierra 3500 HD engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the serpentine belt, motor oil seal, sensors, or a different component.

Questions About 2018 GMC Sierra 3500 HD Engines

Why does my Sierra 3500 HD’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Sierra 3500 HD testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why is my GMC Sierra 3500 HD making engine noise? Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my GMC Sierra 3500 HD engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I use water in my GMC Sierra 3500 HD radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause the engine in my Sierra 3500 HD to suddenly stop? Reasons your Sierra 3500 HD car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who can repair my GMC Sierra 3500 HD engine? Your local Firestone Complete Auto Care offers GMC Sierra 3500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!