Why does the check engine light in my Bonneville turn on when I start my car?

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

Why is my Pontiac Bonneville making engine noise?

Strange under-the-hood noises can point to problems within your Pontiac Bonneville 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 might be coming from the brakes, not the engine.

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

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I add water to my Pontiac Bonneville radiator?

It’s not recommended you put water in your Bonneville 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 Bonneville to suddenly stop?

There are different reasons your Bonneville vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Where can I go for Pontiac Bonneville repair?

For Pontiac Bonneville engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

2003 Pontiac Bonneville Engine Repair

Learn about

2003 Pontiac Bonneville Trim Options

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

V6/3.8L

Repairs for Your 2003 Pontiac Bonneville

Nothing lasts forever. Even your Pontiac Bonneville’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 2003 Pontiac Bonneville services.

We Know Pontiac Bonneville Engines

Pontiac Bonneville drivers trust that their Bonneville will take them near and far. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Sometimes plans go sideways. If the unexpected strikes, you may search the internet frantically for quick and affordable 2003 Pontiac Bonneville engine repairs. 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 Pontiac Bonneville 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.

My 2003 Pontiac Bonneville Check Engine Light Is On

An illuminated check engine light on your Pontiac Bonneville is one of the first signs it's time to 'brake' for engine service. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission system, and it won’t go away by ignoring it. Potential causes may include a faulty oxygen sensor, worn spark plug, issues with your catalytic converter, or an engine vacuum leak, but that's only a few of the possible causes. Bring your Bonneville to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. engine rattling, essential fluid leaks, or a sinking feeling that something’s wrong.

2003 Bonneville Engine Services

If your 2003 Bonneville engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a repair can wait, we'll let you know. If it's necessary for your safety, we'll make sure you understand that, too. We seek to give you all the info you need to make a smart decision about our services. By choosing Firestone Complete Auto Care for Bonneville 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, sensors, or a different component.

Engine Q&A 2003 Pontiac Bonneville

Why does the check engine light in my Bonneville turn on when I start my car? It's okay if your check engine light comes on when you first start your vehicle. It’s just your Bonneville firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Pontiac Bonneville making engine noise? Strange under-the-hood noises can point to problems within your Pontiac Bonneville 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 might be coming from the brakes, not the engine.
What could damage a Pontiac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Pontiac Bonneville engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I add water to my Pontiac Bonneville radiator? It’s not recommended you put water in your Bonneville 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 Bonneville to suddenly stop? There are different reasons your Bonneville vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Where can I go for Pontiac Bonneville repair? For Pontiac Bonneville engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.