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Pontiac Grand Prix: Problems & Solutions
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Comments
If you like the car, upgrade to synthetic transmission fluid. This should put you back in business. Let us know how you make out. Good luck.
My 2000 Grand Prix GT is doing the same thing. Talked to some boys in the business and the story is the same, the transmission is dying. What is happening is that their is a leak, valve, seal, bushing..., inside the tranny and the computer is picking up that the pressure has dropped inside of the tranny, it then tells the pump to increase pressure which in turn causes your tranny to sift hard, this is extremely hard on the gears inside the tranny as well as linkages outside of the tranny. This will cycle each time that you shut off the car, other words the computer will reset its self and the problem should go away for a while until the computer picks up the problem again and increase the pressure again, eventually it will shift hard all the time, if your engine light is on your are getting to the later stages of the problem. My car is doing it about every 2 to 3 hundred miles, right now I just shut off the car and the problem goes away, the end is near... keep in mind I am not driving it hard at all, hopefully I can nurse 2 to 3 months out of it before I have to replace it. I understand that this is common on the trannies that are in this car, 4T65E, the GTP has a heavier transmission then the GT so if you could find a good used one it might be cheaper than the $2500.00 that I have been quoted, this is in Canadian currency. Good luck, hopefully this is not your problem and it is just a sensor.
http://www.transmissionspecialty.com/parts/parts/84754-34K.htm
Valve Body Replacement
Removal Procedure
Tools Required
• J 28467-A Engine Support Fixture
• J 28467-90 Engine Support Adapter
• J 36462 Engine Support Adapter Leg Set
Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Remove the throttle body air inlet duct. Refer to Air Cleaner Assembly Replacement in Engine Controls.
Install the J 28467-A .
Install the J 28467-90 .
Install the J 36462 .
Remove the engine mount struts. Refer to Engine Mount Strut Replacement and Engine Mount Strut Replacement in Engine Mechanical.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the left front wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Remove the left engine splash shield. Refer to Splash Shield Replacement - Engine Body Front End.
Remove the stabilizer shaft brackets from the lower control arms. Refer to Stabilizer Shaft Link Replacement in Front Suspension.
Remove the left tie rod end from the steering knuckle. Refer to Steering Knuckle Replacement in Front Suspension.
Remove the wheel speed sensor harness connector. Refer to Wheel Speed Sensor Replacement in ABS.
Remove the left lower ball joint from the left lower control arm. Refer to Steering Knuckle Replacement in Front Suspension.
Disconnect the left drive axle from the transaxle. Refer to Wheel Drive Shaft Replacement in Drive Axle.
Secure the drive axle to the steering knuckle/strut.
Caution: Failure to disconnect the intermediate shaft from the rack and pinion stub shaft can result in damage to the steering gear and/or damage to the intermediate shaft. This damage may cause loss of steering control which could result in personal injury.
Remove the pinch bolt at the intermediate steering shaft. Refer to Intermediate Steering Shaft Replacement in Steering Wheel and Column .
Remove the intermediate shaft from the steering gear. Refer to Intermediate Steering Shaft Replacement in Steering Wheel and Column.
Disconnect the three-way catalytic converter pipe to the right (rear) exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
Support the right side of the frame with jackstands.
Support the left side of the frame with jackstands.
Remove the transaxle mount bracket. Refer to Automatic Transmission Mount Bracket Replacement .
Remove the transaxle mount. Refer to Automatic Transmission Mount Replacement .
Remove the engine mount lower nuts. Refer to Engine Mount Replacement in Engine Mechanical.
Loosen the right side frame to body bolts. Refer to Frame Removal in Frame and Underbody.
Remove the left side frame to body bolts. Refer to Frame Removal in Frame and Underbody.
Adjust the jackstand to the lower left side of the frame.
Position the drain pan under the transaxle.
Remove the wiring harness connector.
Remove the case side cover bolts (56-58).
Remove the case side cover pan (53).
Remove the case side cover gasket (54).
Remove the oil pump. Refer to Oil Pump
Remove the valve body bolts (374-381 and 384).
Remove the valve body (300) while keeping the spacer plate (370) with the transaxle.
Remove the ball check valves (372 and 373) from the valve body.
Remove the spacer plate (370) and gasket.
Remove the ball check valves (372) from the case cover.
Inspect each check valve seat in the spacer plate (370) for excessive peening. Place a ball check valve (372) on each seat and use a flashlight in order to look for visible light between the valve and the seat.
Inspect all components removed from the transaxle. Refer to the Transmission/Transaxle/Transfer Case Unit Repair Manual.
On hot days with the windows rolled up, after work I try to open the
windows and nothing happens, not a sound just the sound of me hitting the
switch. I checked fuses there good. The next
morning when things cool down
windows work fine. This happens more often to the passenger side. This only
happens when inside the car gets hot by the sun? The Pontiac dealer never
heard
of such thing. Can you help?
Thanks for your time.
Bob Klotz
bloodklotz@hotmail.com
Ok - the dealer fixed the problems. Said the loss of power was due to the computer resetting itself or some BS - said there was a "loss of communication".
I said, O.k whatever and prayed this car wasn't going to turn out a problem child like my previous 2000 Grand Am. Well it gets better...
last week while driving, doing about 60mph- my car totally dies. The driver display unit went out (yet the radio stayed on - don't get that!), the gages all dropped to zero, my wheel locked up , as well as my brakes. After almost getting rear ended, I had to coast until there was a place to pull to the side of the road. I turned the car off and then restarted it - then it was fine.
I was extremely pissed! I took it to the dealer. They could not find anything - they shrugged their shoulders and called it an isolated incident. I also called GM - they didn't seem to think it was a big deal either, but I don't think they liked me mentioning that it's going to happen again one day & someone will probably hit me in the rear end & God forbid,if my daughter or I get injuried - can I sue GM???
Although the dealer acts like this is nothing because they found nothing - I still don't think this is acceptable for a brand new vehicle - or any vehicle! Has anyone ever heard of such a thing? Or does anyone have an suggestions? I would appreciate it. It's not a very good thought that my car "might" just die on me instantly while I'm on the belt way!
I have a 2000 Pontiac Grand Prix SE. The clock and radio frequency are on the same LCD. Everytime, when the car key is turned on positon, the clock will be on. Two days ago, the display is off but when I started the engine, it came back. However, the next day, the clock was off forever and the radio frequency was also off. Because the radio is still working I assume that there must be something wrong with the LCD. Does anyone know how to fix this? Thanks very much for your advice.
http://www.zainostore.com/Merchant2/merchant.mvc
The horn on my 2004 GP GT works fine at city speeds but on the interstate the horn only works intermittently.
Anyone else have this problem or one similar?
Thanks
I need answers fast, cuz the car is gonna drain my wallet!
-problems on my 04 GT2 (forced buyback)
-transmission- stuck 3rd gear, power steering failure, window regulator, steering grommets & clips, three new pcms needed, two re-flashes, headlamps out, stereo out, ignition. car stalled 30 times, trans went out 3 times, car revved constantly while stopped, the car is not built very well.
I have a '94 Olds with the 3.1 that has an intermittent starting problem. I may have to check the battery cables. Thanks for the tip!
I've had the car 3 months now and I'll go for 2 or 3 days with no problem then all of a sudden, the whole cycle begins again - radio out - locks locking and unlocking - dash idiot lights coming on. A new wrinkle just appeared the other day - the engine starts to cut out - no power. Dealer says he can't do anything unless the car acts up while in the garage. Any ideas gang?
BUYER BEWARE OF THE 3800 SERIES II ENGINES! I have coworkers who have had the same problem with their engines! One of them was much worse than mine because their engine froze. The other tried to restart their engine and cracked the starter. This is not a Pontiac or Lumina problem - but a GM design problem with the upper intake plenum gasket. GM refuses to do anything about it. Naturally, when I bought my 99 Lumina I also bought the extended warranty - but it ran out 3 months prior to this failure.
On the 2001 Pontiac GP with the 3800 II engine there was a recall (Campaign # 03034) which corrected a potential for coolant leak at upper intake throttle body gasket. My dealer replaced throttle body fasteners as described in campaign 03034.
I had this recall service done in August of 2003. I'm not sure how many other GM vehicles were mentioned in the recall. This recall sounds like it might address the problem you have mentioned. You might want to check into it.
By the way, I love my '01 GP GT. It's been great so far.
It wasn't, last week i pulled out of my driverway, shifted into drive, pressed the accelerator and started driving. THe car didn't even go a yard, it just cut out, the chime and the message came on again and i almost flew out of the windshield cause it pushed me forward so sudden. Half a second later, the car kicked back up and everything was back to normal.
I'm taking it in tomorrow again, hope they fix it finally. :lemon: