Why does the check engine light come on when I start my Sierra 2500 HD?

It’s usually normal for your check engine light to turn on upon ignition. 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.

Why does my GMC engine sound different?

Strange engine sounds can be a sign something’s off in your GMC Sierra 2500 HD. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

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

While it’s not recommended, you can use water in your Sierra 2500 HD radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

What could cause my Sierra 2500 HD engine to 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.

Who fixes GMC Sierra 2500 HD engines?

For GMC Sierra 2500 HD engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Engine Repairs for Your 2020 GMC Sierra 2500 HD

Learn about

2020 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.

V8/6.6L

2020 GMC Sierra 2500 HD Repair

Nothing lasts forever. Even your GMC Sierra 2500 HD’s engine parts and components will change. 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 2020 GMC Sierra 2500 HD.

We 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, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If the unexpected strikes, you may search the internet frantically for quick and affordable 2020 GMC Sierra 2500 HD engine repairs. 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. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

My 2020 GMC Sierra 2500 HD Check Engine Light Is On

An illuminated check engine light on your GMC Sierra 2500 HD is one of the first signs it's time to 'brake' for engine service. A steady or flashing check engine light could signal a serious issue with your fuel, Causes may include a faulty oxygen sensor, bad spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your Sierra 2500 HD issues diagnosed and we'll determine exactly why your check engine light is on. rattling sounds, essential fluid leaks, or engine misfiring.

Engine Repairs for Your 2020 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 don't start working until we have your approval. If a service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. We want to give you all the details you need to make an informed decision about your engine repairs. Choose Firestone Complete Auto Care for GMC Sierra 2500 HD engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the timing belt, oil gasket, fuses, or a different component.

Engine Q&A 2020 GMC Sierra 2500 HD

Why does the check engine light come on when I start my Sierra 2500 HD? It’s usually normal for your check engine light to turn on upon ignition. 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.
Why does my GMC engine sound different? Strange engine sounds can be a sign something’s off in your GMC Sierra 2500 HD. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your 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? While it’s not recommended, you can use water in your Sierra 2500 HD radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What could cause my Sierra 2500 HD engine to 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.
Who fixes GMC Sierra 2500 HD engines? For GMC Sierra 2500 HD engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.