2008 PONTIAC GRAND PRIX Complaints

TPMS VALVE STEM ON LF WHEEL CORRODED AND BEGAN TO LEAK. THE LEAK APPEARED FROM THE DEPTHS OF THE THREADS BETWEEN THE VALVE STEM CAP AND RETAINER NUT. NO NOTICEABLE SIGNS OF CORROSION ON THE EXTERIOR OF THE THREADED PORTION OF THE STEM. THE WHEEL WAS NOT IMPACTED IN ANY WAY, THE TIRE SIMPLY STARTED LOSING 4-6PSI PER DAY. *TR

TL* THE CONTACT OWNS A 2008 PONTIAC GRAND PRIX. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL MECHANIC, WHO PERFORMED A DIAGNOSTIC TEST WHICH LOCATED THE FAILURE AT THE AIR INJECTION PUMP. THE AIR VALVE FAILED DUE TO WATER DAMAGE. THE AIR INJECTION PUMP AND AIR VALVE WERE REPLACED. THE CONTACT FELT THAT THE REPAIR WAS NOT GOING TO PERMANENTLY CORRECT THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 68,550 AND THE CURRENT MILEAGE WAS 68,650.

I DRIVE A 2008 PONTIAC GRAND PRIX GXP AND HAVE HAD NOTHING BUT ISSUES WITH THE TRANSMISSION.WHEN COMING TO A COMPLETE STOP AND THEN TRYING TO ACCELERATE THE CAR WILL STRUGGLE TRYING TO GO.THEN WE WILL GET A BIG JOLT AS THE CAR SLIPS INTO GEAR.WE HAVE ALMOST GOT IN AN ACCIDENT FROM THIS AS WE WERE TURNING INTO A STORE AND ALL OF A SUDDEN THE CAR WILL NOT GO.AS ON COMING TRAFFIC IS COMING WE PURSUE TO TRY TO PUSH A LITTLE HARDER ON THE GAS PEDAL BEFORE FINALLY GETTING A BIG JOLT AND THE CAR GETS INTO GEAR. WE HAVE TOOK THE CAR OVER 9 TO 10 TIMES TO DEALERSHIP AND FILED A COMPLAINT WITH GM.THE DEALERSHIP CLAIMS THAT THEY ARE HAVING ISSUES DUPLICATING THE ISSUE.I DON'T KNOW HOW WHEN IT HAPPENS MORE THAN OFTEN. ITS GETTING PRETTY BAD AND SOON I HAVE A FEELING IT IS GOING TO GO OUT. WE WERE ABLE TO GET ARE WARRANTY ON THE CAR EXTENDED SINCE WE HAVE BEEN TAKING IT TO THE DEALERSHIP FOR THIS ISSUE SINCE AROUND 60 K MILES. WE ARE GOING BACK THIS WEEK TO DROP IT OFF AGAIN.FEELS LIKE A TORQUE CONVERTER AND THEY WILL NOT CHECK ANY OF THE TRANSMISSION PARTS. WE HAVE EVEN REQUESTED TO PAY OUT OF POCKET TO TAKE A LOOK AT THE TRANSMISSION AND TAKE IT APART TO SEE IF THEY CAN FIND ISSUES.THEY HAVE DECLINED IT AS IF THEY DON'T WANT ANYTHING TO DO WITH IT.I DID SOME RESEARCH AND THIS IS WHAT THEY CLAIM THE ISSUE IS "CONVERTER RELIEF VALVE IS THE MAIN CULPRIT IN THE 4T65-HD (AS USED IN THE LS4 APPLICATION) TCC FAILURES.THIS VALVE BLEEDS OFF AT TOO HIGH A PRESSURE,WHICH DAMAGES THE TCC OVER TIME" UPON THE DEALERSHIPS REQUEST WE HAVE HAD ARE TRANSMISSION FLUSHED,FUEL INJECTORS CLEAN AND ON THE 8TH TIME TAKING IT THERE HAVE FOUND THAT TWO MOTOR MOUNTS WERE BROKEN AND THEY CLAIM THAT THIS IS WHAT THE ISSUE WAS. $1,500 DOLLARS LATER AFTER THE REPAIR WE ARE STILL HAVING NOTHING BUT ISSUES WITH THE TRANSMISSION.GM NEEDS TO DO SOMETHING TO GET THIS FIXED BEFORE SOMEONE GETS HURT OR EVEN KILLED. *JS

BRAKELINE CONNECTION UNDER VEHICLE (IN FRONT OF WHERE DRIVER SITS) COULD BECOME CRACKED OR BROKEN IF KNOCKED BY ROAD DEBRIS, OR BUMPS IN THE ROAD. I NOTICED THIS ON MY 2008 GRAND PRIX GXP, SO NOT SURE IF THIS MODEL SITS LOWER TO THE GROUND THAN OTHER GRAND PRIX MODELS. WATCHING RESERVOIR FLUID LEVEL TO DETERMINE HOW MUCH IS LOST OVER A MONTH. I DISCOVERED AFTER NOTICING A BURNT FLUID SMELL IN THE CABIN AFTER 16 MAR 2012. PARTICULARLY STRONG AFTER HARD BRAKE SITUATION I WAS TOLD BY LOCAL DEALER THAT THERE WAS NO WARRENTY ON THIS VEHICLE, AND THAT THE PARTS MAY NOT BE AVAILABLE ANYMORE.

HAD TO REPLACE POWER STEERING PUMP IN 2010, AND NOW IN 2012 REPLACED AGAIN. *TR

TRANSMISSION FAILED WITHOUT NOTICE. DOES NOT MOVE WHEN IN DRIVE, 1ST, 2ND, OR 3RD. HOWEVER REVERSE WORKS FINE. *TR

DELAYED ENGAGEMENT FROM A DEAD STOP, ENGINE REVVED, CAR DIDN'T MOVE AND THEN SLAMMED INTO FIRST GEAR. SINCE ORIGINAL DATE, IT DOES IT SPORADICALLY AS WELL AS SLIPS IN OTHER GEARS. PREPARING TO TAKE TO DEALER BUT FROM READING ONLINE, IT'S OBVIOUS THERE IS A KNOWN DEFECT IN THESE TRANSMISSIONS. *TR

PASSENGER SEAT AIR BAG WEIGHT SENSOR CYCLES ON AND OFF WHEN PASSENGER OF APPROX 150 LBS. IS IN SEAT. HAD DEALER CHECK, SAID WOULD COST APPROX $900 TO REPAIR.AS CAR WAS OUT OF WARRANTY (4YR). THIS IS A VERY EXPENSIVE REPAIR ON A VITAL SAFETY DEVICE THAT SHOULD RELIABLE WELL BEYOND A 3 OR 4 YR PERIOD. *TR

I HAVE TWO ISSUES WITH MY TRANSMISSION. MY VEHICLE ONLY HAS 39,000 MILES. REV-AND-CLUNK STARTS AND NOT STARTING OFF FROM A STOP. THIS IS HAPPENING MORE FREQUENTLY AS THE MILES RACK UP. I HAVE A 2008 PONTIAC GRAND PRIX GXP. *TR

I BOUGHT THIS CAR USED WITH LOW MILEAGE, AROUND 30,000 MILES IN NOVEMBER 2008. MY HEADLIGHTS ARE NOT WORKING ON DIM. THEY WORK FINE ON BRIGHT. SEEMS LIKE THIS COULD BE AN ELECTRICAL PROBLEM OR A SHORT, BECAUSE THE DIMS WORK AT TIMES AND THEN WILL GO OFF IF YOU HIT A BUMP. THIS HAS HAPPENED SEVERAL TIMES SINCE I BOUGHT THE CAR. WARRANTY RAN OUT SO I TOOK IT TO AN INDIVIDUAL MECHANIC WHO REPLACED THE DIMMER SWITCH. THAT DIDN'T FIX THE PROBLEM. I ALSO HAD TO REPLACE THE POWER STEERING PUMP WITHIN THE FIRST YEAR OR TWO OF PURCHASING THIS CAR. *KB