There are 3 owner-reported speed control & cruise complaints for the 2003 Pontiac Grand Prixin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2003 PONTIAC GRAND PRIX. WHILE DRIVING OVER 55 MPH, THE ACCELERATOR PEDAL WOULD ERRONEOUSLY DEPRESS, CAUSING THE SPEED TO INCREASE. THE CONTACT STATED THAT THE VEHICLE DID NOT HAVE A CRUSE CONTROL OPTION. THE CONTACT ALSO INDICATED THAT THE ENGINE HESITATED WHEN IDLING. THE CAUSE OF THE FAILURES WAS NOT DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE CONTACT NOTIFIED CARMART IN RADCLIFFE, KY OF THE FAILURE. THE FAILURE MILEAGE WAS 136,000.
TL* THE CONTACT OWNS A 2003 PONTIAC GRAND PRIX. WHILE DRIVING APPROXIMATELY 25 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED AND BECAME STUCK. AFTER NUMEROUS ATTEMPTS, THE PEDAL RELEASED AND THE VEHICLE RESUMED NORMAL OPERATION. THE FAILURE RECURRED WHILE DRIVING VARIOUS SPEEDS IN 65 DEGREE TEMPERATURES OR GREATER. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS TAKEN TO THE DEALER, BUT NOT DIAGNOSED. THE MANUFACTURER ISSUED A RECALL FOR CERTAIN MODEL VEHICLES UNDER NHTSA CAMPAIGN NUMBER: 04V528000 (VEHICLE SPEED CONTROL); HOWEVER, THE RECALL EXPIRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 162,000.
THREE SEPERATE INCIDENTS (ICY ROADS) WHEN MY 2003 GRAND PRIX GTP ACCELERATED ON IT'S OWN(11,000KM). DEALER NOT ABLE TO FIND THE PROBLEM. TWO OF THE THREE WERE NEAR MISSES OF HEAD ON COLLISIONS IN SCHOOL ZONES. THEY SAID THERE WAS NO PROBLEM BECAUSE THE COMPUTER HADN'T CODED ANYTHING. THEY PUT THE DATA RECORDER INTO CAR. I CAUGHT ONE ACCELERATION AFTER WINTER WAS OVER. THEN THE DEALER WAS A LITTLE NICER AND DIDN'T TREAT ME LIKE SOME DUMB WOMAN WHO DIDN'T KNOW HOW TO DRIVE. (MAYBE SOMETHINGS WRONG WITH THE COMPUTER!!) ANY WAY THEY CHANGED THE THROTTLE POSITION SENSOR. I THOUGHT YES FINALLY I CAN DRIVE THIS CAR I PAID $36,000.00 FOR AND FEEL RELAXED. WELL GUESS WHAT NO I DON'T GET TO BECAUSE THAT WAS NOT THE PROBLEM THE CAR STILL ACCELARATES WHEN IN LOW SPEEDS. THEY ARE NOT CHANGING ANYTHING ELSE AT THE MOMENT AND WANT ANOTHER SNAP SHOT. WELL THEY HAVE ONE, A NEW ONE REALLY ISN'T GOING TO HELP BECAUSE THEY DO NOT WANT TO LOOK AT CHANGING ANYTHING ELSE. I AM ALREADY HAVING NIGHTMARES OF DRIVING THIS CAR NEXT WINTER BECAUSE I'LL NEVER FEEL SAFE IN IT AGAIN!! WHEN I ASKED TO TRADE IT IN THEY ONLY OFFERED ME $17,500 ON THEIR PRODUCT THAT IS UNSAFE ON WHICH I PAID $36,000.00 IS STILL LIKE NEW AND ONLY HAS 17,000.00KM. SO WHEN SOMEONE ENDS UP KILLED MAYBE THEY WON'T BE SO QUICK TO TURN THEIR HEADS AWAY! WHEN I READ THE ARTICLES WRITTEN BY PEOPLE WHO HAVE KILLED SOMEONE AND CLAIM THEIR VEHICLE ACCELARATED ON THEM AND THEY COULD NOT CONTROL IT.I KNOW HOW THEY FEEL. THE ONLY WAY I COULD STOP MY CAR WAS TO TAKE IT OUT OF DRIVE !! \FRUSTRATED
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026