Why does the check engine light in my C2500 turn on when I start my car?

It's okay if your check engine light comes on when you first start your vehicle. It’s just your C2500 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are GMC C2500 engine noises bad?

Strange engine sounds can be a sign something’s off in your GMC C2500. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my GMC C2500 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car 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 C2500 radiator?

While it’s not recommended, you can use water in your C2500 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 can cause the engine in my C2500 to suddenly stop?

If your C2500 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 C2500 engines?

For GMC C2500 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.

Reliable Repairs for 1991 GMC C2500 Engines

Learn about

1991 GMC C2500 Trim Options

Select your GMC C2500 trim level to learn more about GMC-recommended engine repair. Even GMC C2500 parts will get older and change.

V6/4.3L

V8/5.0L

V8/5.7L

V8/6.2L

V8/7.4L

Repairs for Your 1991 GMC C2500

Nothing stays the same forever. Even your GMC C2500’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 1991 GMC C2500.

We Know GMC C2500 Engines

The GMC C2500 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 wrong on the road. When they do, you might find yourself searching for 1991 GMC C2500 engine repair or replacement parts. 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 C2500 engine will be in good hands. 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 1991 GMC C2500 Check Engine Light Is On

An illuminated check engine light on your GMC C2500 is one of the first signs it's time to 'brake' for engine service. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission system that won't go away on its own. Possible causes can include a failing oxygen sensor, worn spark plug, a problem with your catalytic converter, or a leaking engine vacuum, to name a few possible causes. Bring your C2500 to Firestone Complete Auto Care to get computerized diagnostics and we’ll figure out why that check engine light is giving you grief. engine pinging noises, oil leaks, or misfiring.

Engine Repairs for Your 1991 C2500

If your 1991 GMC C2500 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. If it's necessary for your safety, we'll make sure you understand that, too. We seek to give you all the info you need to make a smart decision about our services. By choosing Firestone Complete Auto Care for C2500 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the timing chain or belt, oil gasket, fuses, or a different component.

1991 GMC C2500 Engine Q&A

Why does the check engine light in my C2500 turn on when I start my car? It's okay if your check engine light comes on when you first start your vehicle. It’s just your C2500 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are GMC C2500 engine noises bad? Strange engine sounds can be a sign something’s off in your GMC C2500. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my GMC C2500 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car 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 C2500 radiator? While it’s not recommended, you can use water in your C2500 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 can cause the engine in my C2500 to suddenly stop? If your C2500 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 C2500 engines? For GMC C2500 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.