Why does my G3500’s check engine light come on when I start it?

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.

Why does my GMC engine sound different?

Strange engine sounds can be a sign something’s off in your GMC G3500. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my GMC G3500 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is 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.

Can I use water in my GMC G3500 radiator?

While it’s not recommended, you can use water in your G3500 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 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.

Who fixes GMC G3500 engines?

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

Reliable Repairs for 1985 GMC G3500 Engines

Learn about

1985 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 repair or category to learn more about 1985 GMC G3500 services.

We Care for GMC G3500 Engines

The GMC G3500 is respected for its reliability. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 1985 GMC service center — quick! Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC G3500 engines. Schedule a courtesy inspection at the first sign of engine trouble. 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 1985 GMC G3500

If your G3500 check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission control system that won’t go away on its own. Possible causes can include a failing oxygen sensor, damaged spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your G3500 issues diagnosed and we’ll figure out why that check engine light is giving you grief. engine pinging noises, oil leaks, or misfiring.

Engine Repairs for Your 1985 G3500

When your GMC G3500 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 service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. We seek to give you all the info you need to make a smart decision about our services. 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 cambelt, motor oil seal, ignition coil, or other parts.

1985 GMC G3500 Engine Q&A

Why does my G3500’s check engine light come on when I start it? 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.
Why does my GMC engine sound different? Strange engine sounds can be a sign something’s off in your GMC G3500. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my GMC G3500 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is 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.
Can I use water in my GMC G3500 radiator? While it’s not recommended, you can use water in your G3500 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 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.
Who fixes GMC G3500 engines? Your local Firestone Complete Auto Care fixes GMC G3500 engines. Book an appointment today! We have thousands of locations across the country.