What happens if my GMC Sierra 3500 HD spark plugs fail?

Replace spark plugs on time or about every 30,000 miles or so. Spark plugs are small but mighty. The spark of electricity that the plug emits across a small gap creates the ignition for the combustion needed to start your car. Without that spark, your car won't start.

What do I do if I see a pool of liquid under my GMC Sierra 3500 HD?

Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.

What do hard starts and stops do to my Sierra 3500 HD engine?

Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.

Where can I have a GMC Sierra 3500 HD tune-up done?

At your nearby Firestone Complete Auto Care! Whether you need GMC Sierra 3500 HD service, maintenance, or repairs, our technicians can get the job done.

How frequently do the fuel injectors in my GMC Sierra 3500 HD need to be cleaned?

There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.

Who can I go to for GMC Sierra 3500 HD tune-ups?

When your Sierra 3500 HD needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

Engine Tune-Up Service for Your 2008 GMC Sierra 3500 HD

Get a Tune-Up

Schedule Your GMC Sierra 3500 HD Tune-Up Service Appointment

Tune in to tune up. Listen to your Sierra 3500 HD and schedule an engine tune-up at the first strange squeak, clunk, or click. Make an appointment today.

Schedule an Appointment

Tune-Ups to Help Your GMC Sierra 3500 HD Run Better

Is your engine overdue for a tune-up? If you usually wait until your car has an issue to take it in for service, it might be time to change your ways, especially if you drive a 2008 GMC Sierra 3500 HD. Regular engine tune-ups can optimize your Sierra 3500 HD’s power on the road. Tune-ups help your engine start smoothly and run efficiently, so you can enjoy improved fuel economy and lower emissions. When you follow the guidelines specified by GMC for your vehicle’s tune-up schedule, you can rest assured you’re investing in your Sierra 3500 HD’s long-term engine performance.

Routine Engine Tune-Up Service for Your GMC Sierra 3500 HD

Your local Firestone Complete Auto Care offers a range of engine tune-up services for your 2008 GMC Sierra 3500 HD. The standard Firestone Tune-Up is one service option. It includes a complete visual inspection of engine components, installation of new spark plugs, and a lifetime warranty on parts*. A second service option replaces the air and fuel filter in your Sierra 3500 HD. Our third service is a thorough cleaning of the fuel system. During this type of tune-up, we use a three-step process to get rid of harmful varnish, dirt, and carbon deposit buildup in your Sierra 3500 HD’s fuel injectors, throttle body, and throttle plate. This can improve your fuel system’s performance (and therefore, your engine’s performance). Keep in mind that your Sierra 3500 HD's mileage and maintenance history can uniquely impact its tune-up needs. A one-size-fits-all engine tune-up procedure doesn’t necessarily exist. Talk to a technician about your driving style, mileage, and service history to learn more about your vehicle's specific needs.

Where Should I Go for My GMC Sierra 3500 HD Tune-Up?

Schedule your next 2008 Sierra 3500 HD engine tune-up service at Firestone Complete Auto Care. Follow GMC's recommended maintenance schedule or book an appointment as soon as you notice one of the following: shaking while the engine is idling, poor fuel economy, an illuminated check engine light on your dashboard, or a knocking sound when the engine is running.

*Talk to a Firestone Complete Auto Care teammate for full terms and conditions on warranties.

2008 GMC Sierra 3500 HD Engine Tune-Up Q&A

What happens if my GMC Sierra 3500 HD spark plugs fail? Replace spark plugs on time or about every 30,000 miles or so. Spark plugs are small but mighty. The spark of electricity that the plug emits across a small gap creates the ignition for the combustion needed to start your car. Without that spark, your car won't start.
What do I do if I see a pool of liquid under my GMC Sierra 3500 HD? Puddles could indicate an oil leak, coolant leak, or brake fluid leak– all of which can critically hurt your engine. Have your engine inspected as soon as you spot a pool of liquid in your usual parking spot.
What do hard starts and stops do to my Sierra 3500 HD engine? Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.
Where can I have a GMC Sierra 3500 HD tune-up done? At your nearby Firestone Complete Auto Care! Whether you need GMC Sierra 3500 HD service, maintenance, or repairs, our technicians can get the job done.
How frequently do the fuel injectors in my GMC Sierra 3500 HD need to be cleaned? There is no hard and fast rule on how often fuel injectors should be cleaned, and it can vary based on driving habits and fuel type. Some manufacturers may suggest including a fuel system cleaning in your regular maintenance schedule. Or you may need to clean your fuel injectors as needed if you notice signs of a fuel system problem.
Who can I go to for GMC Sierra 3500 HD tune-ups? When your Sierra 3500 HD needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

Proactive Maintenance - 2008 GMC Sierra 3500 HD

Stay ahead of any potential issues with your GMC Sierra 3500 HD so your car can keep pace with life! Learn more about proper maintenance for your vehicle below.

Repairs on Your 2008 GMC Sierra 3500 HD

Nothing lasts forever. Even your GMC Sierra 3500 HD's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 2008 GMC Sierra 3500 HD repairs.