Why does the check engine light in my C3500 turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is 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 under-the-hood noises can point to problems within your GMC C3500 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 indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my GMC C3500 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, 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 add water to my GMC C3500 radiator?

It’s not recommended you put water in your C3500 radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

What could cause my C3500 engine to suddenly stop?

Your C3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who fixes GMC C3500 engines?

Your local Firestone Complete Auto Care has you covered with expert C3500 engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Reliable Repairs for 1990 GMC C3500 Engines

Learn about

1990 GMC C3500 Trim Options

Select your GMC C3500 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

GMC C3500 Repairs and Services

Nothing stays the same forever. Even your GMC C3500'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 C3500 services.

We Care for GMC C3500 Engines

GMC C3500 drivers trust that their C3500 will take them near and far. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go sideways sometimes. When they do, you might find yourself searching for 1990 GMC C3500 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 C3500 engine will be in good hands. 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 C3500

If your C3500 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 fuel injection, Possible causes can include a failing oxygen sensor, bad spark plug, a clogged catalytic converter, or an engine vacuum leak, but that's only a few of the possible causes. Stop by your local Firestone Complete Auto Care to get your C3500 issues diagnosed and we'll determine exactly why your check engine light is on. engine pinging noises, oil leaks, or engine misfiring.

Engine Repairs for Your 1990 C3500

If your 1990 C3500 engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We never do any work without your sign-off. 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 want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 1990 C3500 engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the serpentine belt, motor oil seal, ignition coil, or a different component.

1990 GMC C3500 Engine Q&A

Why does the check engine light in my C3500 turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is 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 under-the-hood noises can point to problems within your GMC C3500 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 indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my GMC C3500 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, 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 add water to my GMC C3500 radiator? It’s not recommended you put water in your C3500 radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
What could cause my C3500 engine to suddenly stop? Your C3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who fixes GMC C3500 engines? Your local Firestone Complete Auto Care has you covered with expert C3500 engine repair. Schedule an appointment today and see us at one of our thousands of locations.