Why does the check engine light in my K3500 turn on when I start my car?

It's okay if your check engine light comes on when you first start your vehicle. This is just your K3500 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why does my GMC engine sound different?

Strange engine sounds can be a sign something’s off in your GMC K3500. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC K3500 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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 use water in my GMC K3500 radiator?

While it’s not recommended, you can use water in your K3500 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 K3500 to suddenly stop?

If your K3500 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 repairs GMC K3500 engines?

Your local Firestone Complete Auto Care fixes GMC K3500 engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 1991 GMC K3500 Engines

Learn about

1991 GMC K3500 Trim Options

Select your GMC K3500 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 K3500

Stuff wears out. Even your GMC K3500’s engine parts and components will change. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 1991 GMC K3500 services.

We Know GMC K3500 Engines

The GMC K3500 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! Sometimes plans go sideways. When they do, you might find yourself searching for 1991 GMC K3500 engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your GMC K3500 engine will be in good hands. 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.

My 1991 GMC K3500 Check Engine Light Is On

An illuminated check engine light on your GMC K3500 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 injection, Possible causes can include a failing oxygen sensor, damaged spark plug, issues with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Bring your K3500 to Firestone Complete Auto Care to get computerized diagnostics and we'll determine exactly why your check engine light is on. rattling sounds, essential fluid leaks, or misfiring.

GMC K3500 Engine Repair

If your 1991 K3500 engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We make recommendations, but you make the final decision. 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 provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for K3500 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the cambelt, valve guide seal, ignition coil, or another part.

Questions About 1991 GMC K3500 Engines

Why does the check engine light in my K3500 turn on when I start my car? It's okay if your check engine light comes on when you first start your vehicle. This is just your K3500 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why does my GMC engine sound different? Strange engine sounds can be a sign something’s off in your GMC K3500. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC K3500 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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 use water in my GMC K3500 radiator? While it’s not recommended, you can use water in your K3500 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 K3500 to suddenly stop? If your K3500 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 repairs GMC K3500 engines? Your local Firestone Complete Auto Care fixes GMC K3500 engines. Book an appointment today! We have thousands of locations across the country.