Why does the check engine light come on when I start my S15?

It's okay if your check engine light comes on when you first start your vehicle. It’s just your S15 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are GMC S15 engine noises bad?

Unusual noises can signal a problem with your GMC S15 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 a sign of brake problems rather than engine issues.

What could damage my GMC S15 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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.

Is it okay to put water in my GMC S15 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 S15 when you’re out of coolant, having water in the coolant reservoir is better 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 can repair my GMC S15 engine?

Your local Firestone Complete Auto Care fixes GMC S15 engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 1985 GMC S15

Learn about

1985 GMC S15 Trim Options

Select your GMC S15 trim level to learn more about GMC-recommended engine repair. Even GMC S15 parts will get older and change.

L4/1.9L

L4/2.2L

L4/2.5L

V6/2.8L

GMC S15 Repairs and Services

Stuff wears out. Even your GMC S15's many parts and pieces. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 1985 GMC S15 repairs.

We Know GMC S15 Engines

GMC S15 drivers trust that their S15 will take them near and far. You probably thought about that when you got it. Even so, pieces and parts can break down over time. Sometimes plans go sideways. When they do, you might find yourself searching for 1985 GMC S15 engine repair or replacement parts. 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 S15 engine will be in good hands. 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.

My 1985 GMC S15 Check Engine Light Is On

An illuminated check engine light on your GMC S15 is one of the first signs it's time to 'brake' for engine service. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission control system that won’t go away on its own. Causes may include a faulty oxygen sensor, bad spark plug, issues with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your S15 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs your GMC S15 engine needs some TLC are essential fluid leaks, or misfiring.

Engine Repairs for Your 1985 S15

When your GMC S15 engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. 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 S15 engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — timing belt, motor oil seal, ignition coil, or another part.

1985 GMC S15 Engine Q&A

Why does the check engine light come on when I start my S15? It's okay if your check engine light comes on when you first start your vehicle. It’s just your S15 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are GMC S15 engine noises bad? Unusual noises can signal a problem with your GMC S15 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 a sign of brake problems rather than engine issues.
What could damage my GMC S15 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' 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.
Is it okay to put water in my GMC S15 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 S15 when you’re out of coolant, having water in the coolant reservoir is better 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 can repair my GMC S15 engine? Your local Firestone Complete Auto Care fixes GMC S15 engines. Book an appointment today! We have thousands of locations across the country.