Why does the check engine light in my G3500 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 G3500 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are GMC G3500 engine noises bad?

Strange engine sounds can be a sign something’s off in your GMC G3500. 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 my GMC G3500 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 pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my GMC G3500 radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your G3500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What can cause the engine in my G3500 to suddenly stop?

Your G3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Where can I go for GMC G3500 repair?

Your local Firestone Complete Auto Care fixes GMC G3500 engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 1986 GMC G3500

Learn about

1986 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

GMC G3500 Repairs and Services

Nothing stays the same forever. Even your GMC G3500’s engine parts and components will change. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 1986 GMC G3500.

We Know 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. Sometimes plans go sideways. If they do, you’ll have to find a dependable 1986 GMC service center — quick! That’s where Firestone Complete Auto Care comes in. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your GMC G3500 engine will be in good hands. Schedule a courtesy inspection at the first sign of engine trouble. 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 G3500

If your G3500 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 combustion, Causes may include a faulty oxygen sensor, bad spark plug, a problem with your 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 G3500 issues diagnosed and we'll determine exactly why your check engine light is on. Other signs your GMC G3500 engine needs some TLC are oil leaks, or misfiring.

Engine Repairs for Your 1986 G3500

If your 1986 GMC G3500 needs engine repair, our expert techs will let you know what needs to be done and why before they get started. 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. Choose Firestone Complete Auto Care for GMC G3500 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the timing belt, oil gasket, sensors, or another part.

Questions About 1986 GMC G3500 Engines

Why does the check engine light in my G3500 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 G3500 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are GMC G3500 engine noises bad? Strange engine sounds can be a sign something’s off in your GMC G3500. 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 my GMC G3500 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 pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my GMC G3500 radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your G3500 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What can cause the engine in my G3500 to suddenly stop? Your G3500 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Where can I go for GMC G3500 repair? Your local Firestone Complete Auto Care fixes GMC G3500 engines. Book an appointment today! We have thousands of locations across the country.