Why does the check engine light in my G3500 turn on when I start my car?

It’s usually normal for your check engine light to turn on upon ignition. This is just your G3500 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why is my GMC G3500 making engine noise?

Unusual noises can signal a problem with your GMC G3500 engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by 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 G3500 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.

Can I put water in my GMC G3500 radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause a G3500 engine to suddenly stop?

If your G3500 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 G3500 repair?

For GMC G3500 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 1991 GMC G3500

Learn about

1991 GMC G3500 Trim Options

Select your GMC G3500 trim level to learn more about GMC-recommended engine repair. Even GMC G3500 parts will get older and change.

V6/4.3L

V8/5.7L

V8/6.2L

V8/7.4L

GMC G3500 Repairs and Services

Stuff wears out. Even your GMC G3500's many parts and pieces. 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 1991 GMC G3500.

We’re Trained to Care for GMC G3500 Engines

The GMC G3500 is respected for its reliability. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Things can go wrong on the road. When they do, you might find yourself searching for 1991 GMC G3500 engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service GMC G3500 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 1991 GMC G3500

An illuminated check engine light on your GMC G3500 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 vehicle's ignition, Potential causes may include a faulty oxygen sensor, bad spark plug, issues with your catalytic converter, or an engine vacuum leak, but that's only a few of the possible causes. Bring your G3500 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs your GMC G3500 engine needs some TLC are essential fluid leaks, or misfiring.

1991 G3500 Engine Services

When your GMC G3500 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 repair can wait, we'll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for G3500 engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the cambelt, oil gasket, fuses, or a different component.

Engine Q&A 1991 GMC G3500

Why does the check engine light in my G3500 turn on when I start my car? It’s usually normal for your check engine light to turn on upon ignition. This is just your G3500 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why is my GMC G3500 making engine noise? Unusual noises can signal a problem with your GMC G3500 engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by 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 G3500 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.
Can I put water in my GMC G3500 radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause a G3500 engine to suddenly stop? If your G3500 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 G3500 repair? For GMC G3500 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.