Why does the check engine light come on when I start my C2500?

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. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to 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 C2500 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. 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?

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 C2500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What could cause my C2500 engine to suddenly stop?

There are different reasons your C2500 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 can repair my GMC C2500 engine?

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.

1990 GMC C2500 Engine Repair

Learn about

1990 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

Repairs for Your 1990 GMC C2500

Nothing stays the same forever. Even your GMC C2500's many parts and pieces. We’re here to help when something stops working. Select a repair or category to learn more about 1990 GMC C2500 services.

We Know GMC C2500 Engines

GMC C2500 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 1990 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 millions of vehicles since 1926, and our professional technicians are trained to service GMC C2500 engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. 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 1990 GMC C2500

If your C2500 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 car’s ignition, Possible causes can include a failing oxygen sensor, damaged spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your C2500 in for an on-board diagnostic check and we’ll figure out why that check engine light is giving you grief. Other signs your GMC C2500 engine needs some TLC are oil leaks, or engine misfiring.

1990 C2500 Engine Services

When your GMC C2500 engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. 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 1990 C2500 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the timing belt, oil gasket, sensors, or another part.

1990 GMC C2500 Engine Q&A

Why does the check engine light come on when I start my C2500? 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. Knocking or tapping could be a symptom of low oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can be traced back to 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 C2500 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. 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? 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 C2500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What could cause my C2500 engine to suddenly stop? There are different reasons your C2500 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 can repair my GMC C2500 engine? 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.