Why does the check engine light in my R3500 turn on when I start my car?

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 light should turn off in a bit, but come see us if it doesn't.

Are GMC R3500 engine noises bad?

Strange under-the-hood noises can point to problems within your GMC R3500 engine. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC R3500 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Is it okay to put water in my GMC R3500 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 could cause my R3500 engine to suddenly stop?

Your R3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who can repair my GMC R3500 engine?

Your local Firestone Complete Auto Care fixes GMC R3500 engines. Book an appointment today! We have thousands of locations across the country.

1991 GMC R3500 Engine Repair

Learn about

1991 GMC R3500 Trim Options

Select your GMC R3500 trim level to learn more about GMC-recommended engine repair. Use the following chart to find information.

V8/5.7L

V8/6.2L

V8/7.4L

Repairs for Your 1991 GMC R3500

Nothing lasts forever. Even your GMC R3500’s engine parts and components will change. We’re here to help when something stops working. Click on a repair below to learn more about 1991 GMC R3500 repairs.

We Know GMC R3500 Engines

GMC R3500 engines are known for their 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. If the unexpected strikes, you may search the internet frantically for quick and affordable 1991 GMC R3500 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 R3500 engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Illuminated Check Engine Light on 1991 GMC R3500

An illuminated check engine light on your GMC R3500 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 car’s ignition, Possible causes can include a failing oxygen sensor, bad spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few potential sources. Bring your R3500 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. engine pinging noises, burning smells, or engine misfiring.

Engine Repairs for Your 1991 R3500

If your 1991 GMC R3500 needs engine repair, our technicians will provide you with a thorough explanation beforehand. We don't start working until we have your approval. If a repair isn’t urgent right now, 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. Choose Firestone Complete Auto Care for GMC R3500 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the serpentine belt, motor oil seal, fuses, or another part.

Questions About 1991 GMC R3500 Engines

Why does the check engine light in my R3500 turn on when I start my car? 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 light should turn off in a bit, but come see us if it doesn't.
Are GMC R3500 engine noises bad? Strange under-the-hood noises can point to problems within your GMC R3500 engine. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC R3500 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Is it okay to put water in my GMC R3500 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 could cause my R3500 engine to suddenly stop? Your R3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who can repair my GMC R3500 engine? Your local Firestone Complete Auto Care fixes GMC R3500 engines. Book an appointment today! We have thousands of locations across the country.