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Grand Prix

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When I accelerate, my car hesitates, the rpms bounce, and sometimes i have a missfire flashing CEL
Hello and thank you for your question. With having your engine with bank 1 being lean (lack of fuel), the symptoms are showing that there is a problem with fuel delivery or excessive heat. If the EGR valve was to...
I use my turn signal and my brights come on
Hi and thanks for contacting YourMechanic. Your turn signal and high beams are working on the same switch. If you push the switch up and down, it activates the turn signals. If you move the switch in towards you, it...
My power steering - 2006 Pontiac Grand Prix
Usually power steering systems have a pressure hose that goes from the pump to the rack and pinion there is a return hose that goes from the rack and pinion to the reservoir and then there is a feed hose...
All the dashboard lights came on. Car seems to be running fine
Hi there. All the dash lights coming on and staying on when you started your vehicle, leads me to believe, there is a problem with your vehicle's charging system. It could be caused by a faulty alternator. This would not...
Need a reliable brand for the belt tensioner.
Hello and thank you for contacting YourMechanic. Shopping around for parts can be frustrating when it comes to specific brands. Some brands are not as good as other brands, however, a low quality belt and a high quality belt should...
Pontiac Grand Prix shaking at 30 mph
If there is a broken piece on the rim it will cause the rim to be out of balance and shake when the car picks up speed. I would definitely get the rim fixed and re-balance and see if that...
My 2006 GTP will not start with its key but with power to the starter will crank and run for a short period then stop
There are still problems with the Passlock security system, as evidenced by the Security Symbol appearing on your instrument cluster. This will require a GM Tec II tool to read the security code(s). An OBD-only tool will not "see" those...
Power steering - 2007 Pontiac Grand Prix
Hi. It is very difficult to tell you size of the belts that would needed to eliminate the power steering pump without measuring some things on the car. If I had to guess, you may need a belt that is...
Car runs hotter than normal on express way
Hello. If the car is running hot at higher speeds, then that typically means it has a clogged radiator or a thermostat that is not fully opening. It can also be caused by a slightly leaking head gasket. I usually...
Car starts but doesn't accelerate or backup
Hi, thanks for writing in. I'd be happy to provide my insight. This may be clutch-related if the clutch plates are worn or could possibly be worn out or damaged gear synchronizers. These are small fork shaped components in your...
Power steering needing fluid
Hello, thanks for your question. In order to answer your question I would need more detailed information. Power steering systems use hoses, a pressure hose, and a return hose. The pressure hose goes from the pump to the power steering...
Cooling fans
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...
The car makes loud shaking/jarring noise when the steering wheel is only slight turned rightward. There is no noise when turning left.
Hi there. From the description you have provided, the noise you are hearing from the rear of the vehicle and the feeling your vehicle has while driving, should be looked at sooner than later. The swaying (fish-tail) action, could be...
Engine shuts off when slowing down or at a complete stop.
Hello, thanks for writing in. This can be caused by a number of things. From the symptoms that you have though I would start by checking the throttle body. If it is very dirty then the throttle plate may be...
Car cuts off when i take my foot off the gas just started happening right after i put gas in it
This is a common problem which often is related to the mass air flow sensor. This is a unit that regulates air intake as it is mixed with fuel prior to being injected into the engine. When this is not...
I have a 97 Pontiac Grand Prix SE and want to put a supercharger motor in it. Will it fit and can I use the SE transmission?
Hi, thanks for writing in. The supercharged engine will fit in your car and it should bolt up to the transmission that is already in your car. Pontiac made cars that year that had supercharged engines and I'm pretty sure...
Car only drives in reverse now
Hi, thanks for writing in. Most likely, the "forward apply band" has failed in your transmission. This failure will affect all forward gears as you are experiencing. This should be diagnosed by a reputable transmission shop who can confirm this...
Overheating engine and coolant leak steam under hood
This suggests you may have a cooling system problem. This can be caused by a faulty thermostat, a bad cooling fan relay, a failing water pump, a clogged radiator, or potentially even a blown head gasket. If you need help...
My gas gauge keeps fluctuating from empty to full and everything in between.
The symptoms you are having may be related to a mechanical issue, or an electrical issue. If the problem is electrical, you will want to check the wiring terminal that connects to the fuel pump. You may need to drop...
What grade of gas should I put in my 2008 grand prix
Your car should run just fine on 87 octane fuel unless you have other modifications to your car such as a super charger or turbo charger. The knocking may suggest that you have something else wrong with your engine. Your...

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