Why does the check engine light in my C3500 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 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.

Why is my GMC C3500 making engine noise?

Strange under-the-hood noises can point to problems within your GMC C3500 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my GMC C3500 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 accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I put water in my GMC C3500 radiator?

While it’s not recommended, you can use water in your C3500 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 a C3500 engine to suddenly stop?

There are different reasons your C3500 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 C3500 engine?

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 1986 GMC C3500 Engines

Learn about

1986 GMC C3500 Trim Options

Select your GMC C3500 trim level to learn more about GMC-recommended engine repair. Even GMC C3500 parts will get older and change.

L6/4.8L

V8/5.0L

V8/5.7L

V8/6.2L

V8/7.4L

GMC C3500 Repairs and Services

Nothing lasts forever. Even your GMC C3500's many parts and pieces. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 1986 GMC C3500.

We Care for GMC C3500 Engines

GMC C3500 engines are known for their reliability. You probably thought about that when you got it. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If they do, you’ll have to find a dependable 1986 GMC service center — quick! 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 C3500 engine will be in good hands. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 1986 GMC C3500

As soon as your C3500 check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s flashing or steadily illuminated could point to problems with your car’s ignition, Possible causes can include a failing oxygen sensor, worn spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few possible causes. Bring your C3500 to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. Other signs it's time for GMC C3500 engine service might include oil leaks, or misfiring.

Engine Repairs for Your 1986 C3500

If your 1986 GMC C3500 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 service can wait, we’ll make sure you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to give you all the details you need to make an informed decision about your engine repairs. By choosing Firestone Complete Auto Care for C3500 engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the timing belt, motor oil seal, sensors, or other parts.

1986 GMC C3500 Engine Q&A

Why does the check engine light in my C3500 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 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.
Why is my GMC C3500 making engine noise? Strange under-the-hood noises can point to problems within your GMC C3500 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my GMC C3500 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 accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I put water in my GMC C3500 radiator? While it’s not recommended, you can use water in your C3500 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 a C3500 engine to suddenly stop? There are different reasons your C3500 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 C3500 engine? 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.