Why does my Sierra 2500 HD’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. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are GMC Sierra 2500 HD engine noises bad?

Strange engine sounds can be a sign something’s off in your GMC Sierra 2500 HD. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my GMC Sierra 2500 HD engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my GMC Sierra 2500 HD 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 2500 HD when you’re out of coolant, having water in the coolant reservoir is better than nothing.

Why did my Sierra 2500 HD engine suddenly stop?

If your Sierra 2500 HD car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Where can I go for GMC Sierra 2500 HD repair?

Your local Firestone Complete Auto Care offers GMC Sierra 2500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 2006 GMC Sierra 2500 HD

Learn about

2006 GMC Sierra 2500 HD Trim Options

Select your GMC Sierra 2500 HD trim level to learn more about GMC-recommended engine repair. Use the following chart to find information.

V8/6.0L

V8/6.6L

V8/8.1L

2006 GMC Sierra 2500 HD Repair

Stuff wears out. Even your GMC Sierra 2500 HD’s engine parts and components will change. We’re here to help when something stops working. Select a service or repair below to learn more about what we can do for your 2006 GMC Sierra 2500 HD.

We’re Trained to Care for GMC Sierra 2500 HD Engines

The GMC Sierra 2500 HD is respected for its reliability. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Sometimes plans go sideways. 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. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service GMC Sierra 2500 HD engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

My 2006 GMC Sierra 2500 HD Check Engine Light Is On

As soon as your Sierra 2500 HD check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your fuel, Causes may include a faulty oxygen sensor, damaged spark plug, issues with your catalytic converter, or a leak in the engine vacuum, but that's only a few of the possible causes. Bring your Sierra 2500 HD in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. engine rattling, burning smells, or engine misfiring.

Engine Repairs for Your 2006 Sierra 2500 HD

When your GMC Sierra 2500 HD engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We never do any work without your sign-off. If a repair can wait, we'll let you know. If it's necessary for your safety, we'll make sure you understand that, too. 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 2006 Sierra 2500 HD engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the timing chain or belt, valve guide seal, sensors, or a different component.

Questions About 2006 GMC Sierra 2500 HD Engines

Why does my Sierra 2500 HD’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. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are GMC Sierra 2500 HD engine noises bad? Strange engine sounds can be a sign something’s off in your GMC Sierra 2500 HD. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my GMC Sierra 2500 HD engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my GMC Sierra 2500 HD 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 2500 HD when you’re out of coolant, having water in the coolant reservoir is better than nothing.
Why did my Sierra 2500 HD engine suddenly stop? If your Sierra 2500 HD car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Where can I go for GMC Sierra 2500 HD repair? Your local Firestone Complete Auto Care offers GMC Sierra 2500 HD engine repair. Schedule an appointment today at one of our thousands of locations nationwide!