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

Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Sonoma firing up 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?

Strange engine sounds can be a sign something’s off in your GMC Sonoma. 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 coming from the brakes, not the engine.

What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sonoma engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I use water in my GMC Sonoma 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 Sonoma when you’re out of coolant, having water in the coolant reservoir is better than nothing.

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

If your Sonoma car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who can repair my GMC Sonoma engine?

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

1991 GMC Sonoma Engine Repair

Learn about

1991 GMC Sonoma Trim Options

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

L4/2.5L

V6/2.8L

V6/4.3L

Repairs for Your 1991 GMC Sonoma

Nothing lasts forever. Even your GMC Sonoma's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 1991 GMC Sonoma repairs.

We Know GMC Sonoma Engines

GMC Sonoma drivers trust that their Sonoma will take them near and far. 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 sideways sometimes. When they do, you might find yourself searching for 1991 GMC Sonoma engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service GMC Sonoma engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 1991 GMC Sonoma

An illuminated check engine light on your GMC Sonoma is one of the first signs it's time to 'brake' for engine service. A steady or flashing check engine light could signal a serious issue with your fuel injection, Potential causes may include a faulty oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few potential sources. Bring your Sonoma in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. engine pinging noises, oil leaks, or engine misfiring.

1991 Sonoma Engine Services

If your 1991 GMC Sonoma needs engine repair, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. Choose Firestone Complete Auto Care for GMC Sonoma engine repairs and you can feel good knowing that we only use GMC-compliant replacement parts such as the timing belt, valve guide seal, sensors, or another part.

Questions About 1991 GMC Sonoma Engines

Why does my Sonoma’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Sonoma firing up 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? Strange engine sounds can be a sign something’s off in your GMC Sonoma. 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 coming from the brakes, not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sonoma engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I use water in my GMC Sonoma 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 Sonoma when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What can cause the engine in my Sonoma to suddenly stop? If your Sonoma car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who can repair my GMC Sonoma engine? Your local Firestone Complete Auto Care fixes GMC Sonoma engines. Book an appointment today! We have thousands of locations across the country.