Last post on Aug 22, 2013 at 12:43 PM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Transmission, Sedan
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#247 of 498 Re: Grand Prix GXP transmission problems [cmartin1116]
Sep 29, 2010 (7:29 pm)
Like martin I have just gone through he same BS.
2003 GTP special edition w/70,000km. Trani was stallin stop signs/lites. accelerate it would hesitate the spin rubber & jolt. took it to a GM dealer who said there was "no problem". I insisted & they drove again. Told me trani was shot & w/b $3800 min to fix or $4800 min to replace !! Took to an independant authorized GM repair shop. $3200 later it's fine. went on GM's chat line & was `told maybe there was sumthin they might do & I should save receipts. follow-up call but no satisfaction. Got a response from their Rep that said so sorry.... If I went to the dealer they could have helped me?? Was I talkin to someone from a call center in the middle east???
35 yr GM customer (6 new vewhicles from Eagle Ridge Pontiac in Coquitlam) can't build a trani that lasts beyond 70,000 km?
Guess I'll move over to Ford, surely they know hoew to buil a trani?
Have been a GM fan for over 35 yrs & bought new & used forever.
#248 of 498 Re: 2003 Grand Prix has me stumped [ronnie54]
Oct 22, 2010 (7:15 am)
1) Do you get an engine check light?
2) Do you hear valve tapping noises?
3) Did you check your ign system? [Coils, wires, plugs]
#249 of 498 bad tranny 2 years after rebuilding it, now the same issues
Oct 27, 2010 (1:36 pm)
Can someone help please help me with some answers?I Own a 2000 Grand Prix Gtp and My transmission began acting strange 2 days ago. I was driving it then i came to a stop because of traffic and when it cleared drive or 3rd would not engage, only 2nd and 1st gears. This happened to me 2 years ago and i got the tranny rebuilt for 1230.00 now its acting up once again with the same issue without any signs at all. Can someone give me an answer to what could be a matter with it. please thanks
#250 of 498 Re: 2007 grand prix surging problem [purplefreak8]
Oct 27, 2010 (6:12 pm)
I have a 2000 Impala with the same issue you described. The engine runs great from gears 1-2 and sometimes when it hits 3 and definitely 4th, I feel the surging, but only when I apply the gas pedal with moderate acceleration. If I tromp on it, the surging goes away. If I let off the gas pedal a little, the surging stops.
I was wondering if you ever found your problem ? I work on cars A LOT and I can usually find the root cause issue to issues like this when they are repeatable issues. This one has me mind boggled. I have tried blocking off the EGR. I took out the PCV and inspected and found nothing wrong. I changed my spark plug wires, and tried many other things and still no difference.
I have a few more things to try, but wanted to see if you ever found out what was causing your issue.
Let me know.
#251 of 498 Re: bad tranny 2 years after rebuilding it, now the same issues [ne0305]
Oct 30, 2010 (12:44 pm)
My girlfriends GTP is also having this issue...we hooked a scan tool to it and it said it had problems with a solenoid. So we took it to a trans shop and they told the car to force the solenoid to engage and it didnt work. Basically there is a band the broke in your transmission.
#252 of 498 Re: My 2000 Grand Prix GP 3800 hesitation solved [grwatcher]
Nov 16, 2010 (9:33 am)
I am having this problem with my 2001 pont. grand prix. My low coolant light stays on inspite of the fact that I changed the low coolant sensor and the radiator. the car does not get hot at all.I seem to have no power between shifts once I reach 50 mph it seems fine but below that it will not pick up properly and if I press hard on the gas it wil grab and run the rpms way up but doesn't sound or feel right.Any suggestions? Please. I have no check engine lights on.I have given the car a tune up and oil change. ????
#253 of 498 Lots of Tranny problems!!!!!
Nov 19, 2010 (3:34 pm)
The basic FWD 3800 automatic used in the GT, GTP, and the V-8 model is probably the std tranny with a few beefy parts..If you have a heavy foot, you will pay the piper..Hey it's GM quality!!!!
I have a 2006 GPGT, purchased 40 mos ago with 4300miles, Caddy tradein, paid 1/2 of original sticker..now showing 51k mi..
A good car, not a great car, cruises easy at 80, supercharger helps high end, and low end is not a 3.8 feature.. My other ride is a 2010 Mustang GT w/track pkg built for play, however at 77 yrs old it is fun..
#254 of 498 Power failure under moderate- hard acceleration
Nov 22, 2010 (6:33 am)
Hi hoping someone can help. I have a 2003 Grand Prix GT with 95k on it and when I try to "punch it" acceleration seems to drop like a stone and effectively freezes around 4000 RPM mybe a little less. speed will pick when I ease up on the trottle and kick it up more gently. WTF? I really have no intention of putting alot of money into it. please advise
#255 of 498 Re: Power failure under moderate- hard acceleration [jja73]
Nov 22, 2010 (8:59 pm)
I just went through this. No engine lights or anything. It was my catalytic convertor. Cost me about $250.00 to replace. Now runs great!. The only way I found out was to have them drill a small hole in front of the cat and attach a pressure gauge . when the car was started it showed a lot of back pressure coming back from the cat meaning it was clogged. Then we did the same thing after the cat and the needle didn't even move. Meaning the muffler and the resonator were fine. Plugged up the holes, replaced the cat, and road tested at 100 m.p.h. . very smooth and lots of pick up. Hope this helps!
#256 of 498 2006 Grand Prix GXP
Nov 25, 2010 (11:56 am)
Transmission Problem. Sometimes when coming out of reverse and going into drive the tranny goes into neutral for a second or two then pops into gear and locks in. Cannot reproduce it. never know when it will happen. 98,000 miles on the car. Any body have any idea what to do about it?