No codes, will not accelerate with throttle position and will hear a rattle also, air intake clean, and all data values on scan tool appears normal. Not sure if trans problem or what, does drive ok with normal driving, but with power demand, just stumbles and not a misfire problem looking at scan values.

2002 Pontiac Grand Prix 3800 series 2.

Engine light stays on.
Question = engine light stays on, if I floor it light blinks then stays on again. is there something wrong?

Answer: Yes, there absolutely is something wrong. Anytime the check engine light is on, there is a code(s) stored in the computer that is related to what part of the emissions system is having a problem.

2000 Pontiac Grand Prix 3.8L V6.

GM Computer codes = Manifold Absolute Pressure ( AKA MAP ). Crank & Cam Position Sensors, Ignition Module, Plugs replaced, checked fuses.
question =    I have a 2000 Pontiac Grand Prix. About a week ago my car started shutting off when I was driving. Just like as if I turned the key off.

Question: i have a 1998 Pontiac grand prix gtp and the other day while running at high speed it felt like there was a miss , then i had to stop at a red light and when i hit the gas the car wouldn't move. I tried to put it in park then reverse and then drive then 2 and 1st and no mater where i put the shifter i would not move.

1988 Pontiac Grand Prix 2.8L V6.

Replace Serpentine belt and power steering pump
Question = Belt broke on the freeway, car overheated (Daughter driving). I replaced the belt and added water to the radiator. Car starts fine and will idle but as soon as you give it gas it stalls. LOTS of white smoke.

Problem with my 2001 Pontiac Grand Prix. Engine size = 3.8L (VIN k). Repairs for this problem = EGR Valve caught on fire, can't find replacement part.

The EGR Valves we have found (internet, parts dealers) will not fit my car. They have a plug on the top, whereas the one we need has no plug but instead has a vacuum hose.

2007 Pontiac Grand Prix GT

Engine Size : 3.8
Question: When i put the car in drive the door locks won't apply and the inter lights stay on, if i put the car in and out of drive the locks will apply sometimes there must be a switch on the drive trans where is it and what is it called ?

Hello, I have a 2000 Grand Prix with the 3.1 in it. The temp gauge isn't working and the cooling fans will not come on. I was told that there is more then one sensor and I'm having trouble with the location. There is only one I see which is right at the side of the thermostat housing and is a three probe plug in.

2004 Pontiac Grand Prix 3800 V6. Check engine light.

No transmission work prior to problem. Trouble code has been checked and is coolant intake/manifold related. 
I recently noticed a popping/grinding sound when I shift into reverse. I believe there are bulletins that note a harsh or garage shift into reverse,

1998 Pontiac Grand Prix GT

Engine Size : 3800 V6
Question : While driving down the road the SRS Air Bag light will start to blink, the RPM's will go up and I loose 4th gear. When I then come to stop and go to take off again, 1st gear is gone and it is identical to starting off in second gear of a manual transmission...

Problems with my 2004 Pontiac Grand Prix.
Engine size 6 cyl.
Warning lights = Effort Steering, Service ABS, Service Tire Pressure
Just replaced transmission a few months ago! Also speedometer not reading correctly.
This appears to be a problem as it is all over the internet. Is there a known fix, and has GM covered any of it?

1995 Pontiac Grand Prix ABS and Brake lights on.

The brakes were done and the window switch was worked on the car and there was a new water pump put in.
I bought the car on Saturday used. I test drove it and it ran fine but the ABS lights was on. The next day the drivers side window stopped working. The next day drove it.

Question: My 1998 Pontiac Grand Prix GTP's CJ2 Digital Heater - A/C Control is putting out only 0.03 volts at pin C11 when the CJ2 connector is back probed and the defroster is set to high. I have performed the air conditioning diagnostics ("Blower Motor Inoperative at Any Speed," pages. 1-186 and 1-187) several times always reaching the final step, # 29, which is to replace the Heater - A/C Control.

Problem with my 1999 Pontiac Grand Prix
Replaced spark plugs and wires.
My engine misses and stalls at stop signs, and sometimes runs normally then misses again.

2006 G6 Gtp 3.9 Engine Size : 3.9

Question: Getting a loud harmonic humming up front. What would cause this type of noise? Changed bearings out.

Answer: If the front hub bearings did not fix your problem, this could just be tire noise. Swap the front and rear tires to see if the noise changes.