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

Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are GMC Sonoma engine noises bad?

Unusual noises can signal a problem with your GMC Sonoma engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

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

Can I put water in my GMC Sonoma radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What could cause my Sonoma engine 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.

Where can I go for GMC Sonoma repair?

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

Reliable Repairs for 1999 GMC Sonoma Engines

Learn about

1999 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.

L4/2.2L

V6/4.3L

1999 GMC Sonoma Repair

Nothing lasts forever. Even your GMC Sonoma'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 1999 GMC Sonoma.

We Know GMC Sonoma Engines

GMC Sonoma engines are known for their 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 wrong on the road. If the unexpected strikes, you may search the internet frantically for quick and affordable 1999 GMC Sonoma engine repairs. That’s where Firestone Complete Auto Care comes in. We've serviced more than 500 million vehicles since 1926, and our technicians know GMC Sonoma engines. Schedule an appointment if you're experiencing problems that could require engine repair. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

My 1999 GMC Sonoma Check Engine Light Is On

As soon as your Sonoma check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your vehicle's ignition, Causes may include a faulty oxygen sensor, bad spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Bring your Sonoma to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. rattling sounds, essential fluid leaks, or misfiring.

1999 Sonoma Engine Services

If your 1999 Sonoma engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for Sonoma engine repairs and you can drive easy knowing that we use GMC-approved parts and fluids — timing belt, valve guide seal, ignition coil, or a different component.

Questions About 1999 GMC Sonoma Engines

Why does the check engine light come on when I start my Sonoma? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are GMC Sonoma engine noises bad? Unusual noises can signal a problem with your GMC Sonoma engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a GMC engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your GMC Sonoma 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.
Can I put water in my GMC Sonoma radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What could cause my Sonoma engine 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.
Where can I go for GMC Sonoma repair? Your local Firestone Complete Auto Care has you covered with expert Sonoma engine repair. Schedule an appointment today and see us at one of our thousands of locations.