2007 Pontiac Grand Prix power train problems

“I HAVE SAME PROBLEM AS OTHERS. HAVE BEEN ABLE TO START CAR SOMETIMES BY PUTTING IT IN NEUTRAL. SEVERAL YEARS AGO I LEFT THE CAR WITH OUR SON TO SEE IF HE COULD FIGURE OUT THE PROBLEM BECAUSE MY WIFE QUIT DRIVING THE CAR AFTER BEING STRANDED A FEW TIMES. WHEN USING BLINKERS THE HIGH BEAM WOULD COME ON. IT HAS A ROARING SOUND LIKE A WHEEL BEARING GOING OUT.THE KEY FOB DOESN'T WORK. I'VE BEEN TOLD THE BCM BODY CONTROL MODULE COULD BE CAUSING PROBLEMS. HAD ESTIMATE OF $500 TO REPLACE AND PROGRAM NEW BCM.. WE HAVE TOWED CAR HOME AFTER GOING TO STORE. I USED TO DRIVE OTR SO WE GOT A SECOND VEHICLE TO DRIVE. AFTER READING OTHER POSTS ON THIS CAR 4/4/2021 I DON'T THINK I WANT TO PUT MORE MONEY INTO IT. ESPECIALLY WHEN I'VE READ GM TECHS CAN'T FIX THE PROBLEMS.. ONCE THE VACUUM LINE TO BRAKE BOOSTER CAME OFF WHEN MY WIFE WAS GOING DOWN HILL. I PUT THE LINE BACK ON, IT HASN'T DONE THAT AGAIN. WE HAVE NOT DRIVEN THE CAR OUT OF TOWN FOR FEAR OF IT BREAKING DOWN. AND SHOPS NOT BEING ABLE TO TELL US WHAT IS WRONG WITH IT.. I TIED A CABLE ON TRUNK RELEASE SO I CAN OPEN TRUNK. . WE DID LOVE THE CAR WHEN IT WAS RUNNING. HAS 193,000K AT THIS TIME. HAS STALLED/QUIT ON CITY…”

“TL* THE CONTACT OWNS A 2007 PONTIAC GRAND PRIX. WHILE APPROACHING AN INTERSECTION, THE VEHICLE SEIZED WITHOUT WARNING. THE CONTACT MANAGED TO MOVE THE VEHICLE TO THE SHOULDER OF THE ROAD WITH THE HELP OF A BYSTANDER. THE CONTACT BELIEVES THE KEY FELL OUT OF THE IGNITION. THE POWER STEERING AND BRAKES WENT OUT, PLACE THE GEAR INTO PARK. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE DEALER AND MANUFACTURER WERE NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 52,000. *BF*JB”

“CRANK SHAFTS POSITION SENSOR CAUSES THE ENGINE TO SHUT OFF WHILE DRIVING DOWN THE ROAD. RESULTING IN THE LOSS OF POWER STEERING, AND POWER BRAKES. THIS OCCURS AT ALL SPEEDS FROM STOP AND GO TRAFFIC AT LESS THAN 5 MPH TO HIGHWAY SPEEDS OF 70 MPH +. THIS IS A VERY DANGEROUS ISSUE. ADDING THE RECALL PIECE TO THE KEY DID NOTHING TO REMEDY THE ISSUE. THIS HAS BEEN OCCURRING FOR 2 YEARS NOW.”

“WHEN I WOULD COME TO A STOP AND HIT THE GAS TO TAKE OFF THE CAR HESITATE TO GO RPMS GOING UP BUT THE CAR WOULD ACT LIKE IT WAS NOT IN GEAR. THEN A JERK WOULD OCCUR AND THE CAR WOULD TAKE OFF MAKING IT SCARY TO PULL OUT INTO TRAFFIC. IT TOOK MANY TIMES GOING TO THE DEALER BEFORE THEY REPAIRED IT, IT WAS LINKAGE IN THE TRANSMISSION, IT WAS WORE OUT. 5 YEARS LATER IT IS DOING THE SAME THING. *TR”

“TL* THE CONTACT OWNS A 2007 PONTIAC GRAND PRIX. THE CONTACT STATED THAT THE VEHICLE FAILED TO ACCELERATE AND EXCESSIVE FORCE WAS REQUIRED ON THE ACCELERATOR PEDAL IN ORDER FOR THE VEHICLE TO RESPOND. ALSO, THE CONTACT MENTIONED THAT THE VEHICLE VIBRATED AND JERKED WHEN THE GEARS WERE SHIFTED. THE FAILURE OCCURRED SEVERAL TIMES. THE VEHICLE WAS TAKEN TO A DEALER. THE TECHNICIAN DIAGNOSED THAT THE TRANSMISSION NEEDED TO BE FLUSHED. THE FLUSH WAS PERFORMED BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS NOT NOTIFIED OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS UNKNOWN.”

“VEHICLE TRANSMISSION WOULD NOT SHIFT GEARS PROPERLY, THEN SHIFTED EXTREMELY HARD INTO GEAR. THIS IS A GRAND PRIX GXP MODEL AND AS I HAVE RESEARCHED, THIS TRANSMISSION FAILS AT AN EXCESSIVE RATE. IT IS SUPPOSEDLY A HEAVY DUTY MODEL OF THE TRANSAXLES USED IN THE V6 MODEL, HOWEVER IT RUNS VERY HOT ( FACTORY EXTERNAL COOLER SHOULD HAVE BEEN USED) AND WEARS OUT VERY EARLY. IT HAS FAILED TO SHIFT PROPERLY NUMEROUS TIMES, CAUSING AN UNSAFE CONDITION FOR THE VEHICLE AND DRIVER. *TR”