Last post on Sep 01, 2013 at 6:48 AM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Car Leasing, Car Buying, Sedan
#1434 of 1496 Re: Engine/Trans/Speedometer/Electrical [mandi41986]
Jun 02, 2010 (5:54 am)
I had a 1999 Pontiac Grand Prix GTP (same model before redesign in 2004), I traded it in at 110 miles with really no problems either. I have a 2005 GXP now. Shouldn't need a tune-up, but you may have a bad spark plug, or spark plug wire. I found if it is a spark plug wire, it usually does it under a load, like going up hill etc. Could just be sensor of some sort. Also, could be transmission, take it in for an electronic diagnostic test. My tranny went bad at 55K. See my previous post. Due to the fact the tranny is not well built enough for the 8cyl engine (per my mechanic), plus one of my family members who drove it had a habit of backing out of the driveway, and before the car came to a complete stop, shifting it into drive. This action causes about 1 months tranny wear each time it's done. I parked on many hills, and never used the parking break, and should have. If the car will roll at all, parking break should be used. Hope this helps, but get it to good mechanic shop to just have it checked. If you have On-Star, you can press the blue button and have them do a diagnostic test. (if you subscribe, if so, you can also go to OnStar online, and have emails sent once per month for a major systems diagnositc report.)
#1435 of 1496 Re: Engine/Trans/Speedometer/Electrical [sphinxrb]
Jun 02, 2010 (5:59 am)
Thank you I will try that, They backing up thing makes sense sometimes I make the mistake of doing that too!!
Jun 02, 2010 (8:55 am)
Update: So I took it to the dealer and they said that the tranny fluid smells burnt it isnt black yet but will be, they will try to flush it and replace the speed sensor but if that doesnt work then they will have to replace the tranny... BULLSHIT! I am so mad right now, My car has 45k on it I will NEVER buy another GM product again, If I wasnt still paying on my car which I bought last july by the way I would go buy a ford truck right now.
#1437 of 1496 Re: GXP Tires [dblduce]
Jul 18, 2011 (4:48 pm)
You can put 225 for the rear but it is not recommend GM designed the GXP with staggered tire size for a reson the. GXP has sports tuned suspension and by not keeping 255 in the rear you can cause dramatic handling issues and suspension problems the most usual is the struts internals and mounts crack and will start making noise and damage to tie rod ends and vibration within the sterring coloum. Keep 225 on front and 255 on the rear!
#1438 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [gmcustsvc]
Aug 03, 2011 (7:44 pm)
I am also starting to experiance trans. issues. I have a 07 GXP baught it used, and it ran fine. It started with an occasional hard shift from first - second, then the RPM started to fluctuate 200-300 rpm with the cruise set. Now just this week it started to surge, with lack of power. Any help would be greatly appricieated.
#1439 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [r_dub1]
Aug 04, 2011 (4:35 am)
I didn't get any financial help from GM. My car was out of powertrain warranty. Mine was an 2005, and the warranty was 36 or 50K miles. Mine had around 54K went it went. I believe yours however had the increased warranty for powertrain to 100K, you should definitley check this out. Figured I would have to pay out of pocket, so I took it to a local place, and not the dealer. However, I probably should have took it to the dealer anyway, as on occasion, they do make execptions and cover the repair. I went to a private garage as I having had many bad experiences at dealers charging double what private places do, I felt stuck , and chose a private garage. Looking back, I with I at least tried the dealer, I could always refuse the work, and have it towed somewhere else. The one other piece of advice I can give you: once the repair is made, get a transmission cooler installed (around $500 or less). The problem with these transmissions is the heat build up, and this is the main culprit. If GM fixes the transmission under warranty, have them, or someone install the cooler afterwards. I think it's an investment well worth it to prevent costly repairs down the road. I've seen this mentioned in other forums on the web as well. I finally sold my car as I was so disgusted with it. My dream car V8, and installed 3 transmissions by 60K miles. It was finally fixed with the trans cooler installed, but I had had enough. Also, with these cars, get ceramic brake pads installed. The factory brakes pads are crap, and when they start to squeel, you will get around 40 miles before it's metal to metal, and have to buy rotors as well. My brakes went at 15K miles! Replaced under warranty, then I went to a shop to immediately change the pads to ceramic, no problems again with this issue.
#1440 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [r_dub1]
Aug 04, 2011 (5:47 am)
I apologize for the problems you are experiencing with your transmission. Were you planning on taking the vehicle to your local GM dealership to be diagnosed? Please keep me posted on any information.
Caron, GM Customer Service
#1441 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [gmcustsvc]
Aug 20, 2011 (8:22 pm)
Ok so i just bought a new tranny for my car 2700 out the door... r u freakin kidding me
#1442 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [06grandprixgxp]
Aug 21, 2011 (4:05 am)
If you are going to keep the car, spend a little more if you havn't already, and have a transmission cooler installed, this is the main problem, overheating, and that leads to failure. Take if from me, I put 3 transmissions in my 2005 GXP. I finally decided to dump the car at Carmax for hardy any money, but had to stop the bleeding. Definitley a problem with GM cars that use this transmission. My wife had a 2005 Buick LeSabre, same transmission, and blew also. I have never had transmission problems in the 6 previous GM cars, until these. Now I drive Toyota's.
#1443 of 1496 Re: Anyone else having 2006 Pontiac GXP troubles? [06grandprixgxp]
Aug 23, 2011 (11:08 am)
I apologize for your frustrations. Please keep me updated on your situation. GM dealers have a parts and labor warranty I would recommend inquiring about.
GM Customer Service