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

It's okay if your check engine light comes on when you first start your vehicle. It’s just your Sierra 3500 firing up 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 making engine noise?

Strange engine sounds can be a sign something’s off in your GMC Sierra 3500. 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 indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sierra 3500 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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 add water to my GMC Sierra 3500 radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your Sierra 3500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What could cause my Sierra 3500 engine to suddenly stop?

There are different reasons your Sierra 3500 vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who repairs GMC Sierra 3500 engines?

Your local Firestone Complete Auto Care fixes GMC Sierra 3500 engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 2006 GMC Sierra 3500

Learn about

2006 GMC Sierra 3500 Trim Options

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

V8/6.0L

V8/6.6L

V8/8.1L

Repairs for Your 2006 GMC Sierra 3500

Nothing stays the same forever. Even your GMC Sierra 3500’s engine parts and components will change. When something breaks, we're ready. Click on a repair below to learn more about 2006 GMC Sierra 3500 repairs.

We Know GMC Sierra 3500 Engines

GMC Sierra 3500 engines are known for their reliability. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. If they do, you’ll have to find a dependable 2006 GMC service center — quick! That's when it's time to head to Firestone Complete Auto Care. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your GMC Sierra 3500 engine will be in good hands. Schedule an appointment if you're experiencing problems that could require engine repair. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Illuminated Check Engine Light on 2006 GMC Sierra 3500

If your Sierra 3500 check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your combustion, Potential causes may include a faulty oxygen sensor, damaged spark plug, a problem with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your Sierra 3500 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs it's time for GMC Sierra 3500 engine service might include oil leaks, or misfiring.

Engine Repairs for Your 2006 Sierra 3500

If your 2006 GMC Sierra 3500 needs engine repair, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 2006 Sierra 3500 engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — timing belt, motor oil seal, ignition coil, or another part.

Questions About 2006 GMC Sierra 3500 Engines

Why does my Sierra 3500’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. It’s just your Sierra 3500 firing up 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 making engine noise? Strange engine sounds can be a sign something’s off in your GMC Sierra 3500. 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 indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sierra 3500 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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 add water to my GMC Sierra 3500 radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your Sierra 3500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What could cause my Sierra 3500 engine to suddenly stop? There are different reasons your Sierra 3500 vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who repairs GMC Sierra 3500 engines? Your local Firestone Complete Auto Care fixes GMC Sierra 3500 engines. Book an appointment today! We have thousands of locations across the country.