Why does my Grand Prix’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 Grand Prix firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why is my Pontiac Grand Prix making engine noise?

Strange under-the-hood noises can point to problems within your Pontiac Grand Prix 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 my Pontiac Grand Prix 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 slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Is it okay to put water in my Pontiac Grand Prix radiator?

It’s not recommended you put water in your Grand Prix radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

What can cause the engine in my Grand Prix to suddenly stop?

Reasons your Grand Prix car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who repairs Pontiac Grand Prix engines?

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

Reliable Repairs for 2003 Pontiac Grand Prix Engines

Learn about

2003 Pontiac Grand Prix Trim Options

Select your Pontiac Grand Prix trim level to learn more about Pontiac-recommended engine repair. Use the following chart to find information.

V6/3.1L

V6/3.8L

2003 Pontiac Grand Prix Repair

Nothing lasts forever. Even your Pontiac Grand Prix’s engine parts and components will change. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 2003 Pontiac Grand Prix services.

We Know Pontiac Grand Prix Engines

Pontiac Grand Prix drivers trust that their Grand Prix 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. If they do, you’ll have to find a dependable 2003 Pontiac service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know Pontiac Grand Prix engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Illuminated Check Engine Light on 2003 Pontiac Grand Prix

As soon as your Grand Prix 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 or emission system, and it won’t go away by ignoring it. Possible causes can include a failing oxygen sensor, bad spark plug, issues with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Stop by your local Firestone Complete Auto Care to get your Grand Prix issues diagnosed and our expert techs will get the root of the problem. Other signs it's time for Pontiac Grand Prix engine service might include essential fluid leaks, or misfiring.

Engine Repairs for Your 2003 Grand Prix

If your 2003 Pontiac Grand Prix needs engine repair, our technicians will provide you with a thorough explanation beforehand. We don't start working until we have your approval. 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. Turn to Firestone Complete Auto Care for your 2003 Grand Prix engine repairs and you can feel confident knowing that we use Pontiac-approved parts and components like the timing chain or belt, valve guide seal, fuses, or another part.

Engine Q&A 2003 Pontiac Grand Prix

Why does my Grand Prix’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 Grand Prix firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why is my Pontiac Grand Prix making engine noise? Strange under-the-hood noises can point to problems within your Pontiac Grand Prix 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 my Pontiac Grand Prix 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 slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Is it okay to put water in my Pontiac Grand Prix radiator? It’s not recommended you put water in your Grand Prix radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
What can cause the engine in my Grand Prix to suddenly stop? Reasons your Grand Prix car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who repairs Pontiac Grand Prix engines? Your local Firestone Complete Auto Care has you covered with expert Grand Prix engine repair. Schedule an appointment today and see us at one of our thousands of locations.