Why does the check engine light come on when I start my Sierra 3500 HD?

It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are GMC Sierra 3500 HD engine noises bad?

Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my GMC Sierra 3500 HD engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Is it okay to put water in my GMC Sierra 3500 HD radiator?

It’s not recommended you put water in your Sierra 3500 HD radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

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.

Where can I go for GMC Sierra 3500 HD repair?

Your local Firestone Complete Auto Care has you covered with expert Sierra 3500 HD engine repair. Schedule an appointment today and see us at one of our thousands of locations.

2008 GMC Sierra 3500 HD Engine Repair

Learn about

2008 GMC Sierra 3500 HD Trim Options

Select your GMC Sierra 3500 HD trim level to learn more about GMC-recommended engine repair. Use the following chart to find information.

V8/6.0L

V8/6.6L

Repairs for Your 2008 GMC Sierra 3500 HD

Nothing lasts forever. Even your GMC Sierra 3500 HD's many parts and pieces. When something breaks or fails, we’re ready to help. Select a service or repair below to learn more about what we can do for your 2008 GMC Sierra 3500 HD.

We’re Trained to Care for GMC Sierra 3500 HD Engines

GMC Sierra 3500 HD engines are known for their reliability. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 2008 GMC service center — quick! Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC Sierra 3500 HD engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 2008 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 fuel injection, Possible causes can include a failing oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your Sierra 3500 HD issues diagnosed and we'll determine exactly why your check engine light is on. engine rattling, burning smells, or misfiring.

2008 Sierra 3500 HD Engine Services

If your 2008 GMC Sierra 3500 HD needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We don't start working until we have your approval. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We want to provide you with the information you need to make an informed engine repair decision. Turn to Firestone Complete Auto Care for your 2008 Sierra 3500 HD engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — cambelt, engine oil seal, ignition coil, or a different component.

2008 GMC Sierra 3500 HD Engine Q&A

Why does the check engine light come on when I start my Sierra 3500 HD? It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are GMC Sierra 3500 HD engine noises bad? Unusual noises can signal a problem with your GMC Sierra 3500 HD engine. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my GMC Sierra 3500 HD engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Is it okay to put water in my GMC Sierra 3500 HD radiator? It’s not recommended you put water in your Sierra 3500 HD radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
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.
Where can I go for GMC Sierra 3500 HD repair? Your local Firestone Complete Auto Care has you covered with expert Sierra 3500 HD engine repair. Schedule an appointment today and see us at one of our thousands of locations.