Why does the check engine light in my S15 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 S15 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why does my GMC engine sound different?

Unusual noises can signal a problem with your GMC S15 engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. 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 S15 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car 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 S15 radiator?

While it’s not recommended, you can use water in your S15 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 S15 to suddenly stop?

Your S15 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who fixes GMC S15 engines?

Your local Firestone Complete Auto Care has you covered with expert S15 engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Reliable Repairs for 1986 GMC S15 Engines

Learn about

1986 GMC S15 Trim Options

Select your GMC S15 trim level to learn more about GMC-recommended engine repair. Use the following chart to find information.

L4/2.5L

V6/2.8L

1986 GMC S15 Repair

Stuff wears out. Even your GMC S15's many parts and pieces. When something breaks or fails, we’re ready to help. Select a service or repair below to learn more about what we can do for your 1986 GMC S15.

We’re Trained to Care for GMC S15 Engines

GMC S15 engines are known for their reliability. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Things can go wrong on the road. 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. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service GMC S15 engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Check Engine Light on 1986 GMC S15

As soon as your S15 check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your vehicle's ignition, Causes may include a faulty oxygen sensor, worn spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Bring your S15 in for an on-board diagnostic check and we’ll figure out why that check engine light is giving you grief. Other signs it's time for GMC S15 engine service might include burning smells, or a sinking feeling that something’s wrong.

Engine Repairs for Your 1986 S15

If your 1986 S15 engine needs repairs, our technicians will provide you with a thorough explanation beforehand. 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. Turn to Firestone Complete Auto Care for your 1986 S15 engine repairs and you can feel confident knowing that we use GMC-approved parts and components like the cambelt, oil gasket, ignition coil, or other parts.

Questions About 1986 GMC S15 Engines

Why does the check engine light in my S15 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 S15 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why does my GMC engine sound different? Unusual noises can signal a problem with your GMC S15 engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. 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 S15 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car 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 S15 radiator? While it’s not recommended, you can use water in your S15 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 S15 to suddenly stop? Your S15 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who fixes GMC S15 engines? Your local Firestone Complete Auto Care has you covered with expert S15 engine repair. Schedule an appointment today and see us at one of our thousands of locations.