2008 Pontiac Grand Prix Speed Control & Cruise Problems

ENGINE POWER REDUCED WARNING LIGHT CAME ON AND CAR HAS MINIMAL ACCELERATION NOT ALLOWING TO GO OVER 40 MPH. ANTILOCK BREAK AND TRACTION CONTROL LIGHTS BOTH ON. BREAKING ISSUE WHEN THIS HAPPENS CAUSING BREAKS TO HESITATE. ALL ISSUES LISTED HAPPEN WHILE IN MOTION ON CITY STREET & HIGHWAY, WHILE GOING STRAIGHT & TURNING AND WHEN BREAKING. *TR

TL* THE CONTACT OWNS A 2008 PONTIAC GRAND PRIX. WHILE DRIVING AT 45 MPH, THE VEHICLE FAILED TO ACCELERATE WHILE THE ACCELERATOR PEDAL WAS DEPRESSED AND THE REDUCE ENGINE POWER WARNING MESSAGE ILLUMINATED ON THE INSTRUMENT PANEL. THE FAILURE WAS PERSISTENT. THE CONTACT ALSO STATED THAT THE ENGINE STALLED. THE VEHICLE WAS ABLE TO RESTART. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 94,000. UPDATED 02/05/16*LJ ISSUE ON GOING UPDATED 4/19/18*JB *CN

TL* THE CONTACT OWNS A 2008 PONTIAC GRAND PRIX. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 60 MPH, THE VEHICLE SPEED DECREASED TO 30 MPH. THE "REDUCED ENGINE" WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A DEALER, WHO DIAGNOSED THAT THE ACCELERATOR PEDAL NEEDED TO BE REPLACED. THE FAILURE RECURRED ON ANOTHER OCCASIONS AND THE VEHICLE WAS TOWED TO A DEALER, WHO REPLACED THE THROTTLE PLATE BUT THE FAILURE PERSISTED. THE FAILURE MILEAGE WAS 82,973.

DRIVING ON THE HIGHWAY OR ANYWHERE, IT HAPPENS EVERY OTHER DAY. THE INFORMATION MESSAGE CENTER CHIMES THEN THE CHECK ENGINE LIGHT COMES ON THE CAR SLOWS DOWN TO 25MPH. WHEN I AM ON THE HIGHWAY THIS IS VERY DANGEROUS. I HAVE TAKEN IT TO 3 DIFFERENT SERVICE STATIONS, THE LAST 2 DEALERSHIPS. ALL THE CODES ARE THROTTLE RELATED AND I GET THE CAR BACK AFTER A WEEK OR 2 AND THE SAME THING HAPPENS AGAIN. NO ONE CAN FIX IT. I HAVE EMAILED GM THEY DID NOT RESPOND TO MY EMAIL. I ATTACHED ALL THE SERVICE RECORDS WITH THE EMAIL HOPING THEY WOULD BE ABLE TO HELP. SLOWING ME FROM 70MPH DOWN TO 25MPH ON THE HIGHWAY (US131) WILL CAUSE AN ACCIDENT SOONER NOT LATER. ITS ONLY A MATTER OF TIME BEFORE THIS HAPPENS. GM DOESN'T SEEM TO CARE. I'M NOT SURE WHAT TO DO, NO ONE CAN FIX THE CAR AND I'M RUNNING OUT OF MONEY FOR REPAIRS.

TL* THE CONTACT OWNS A 2008 PONTIAC GRAND PRIX. THE CONTACT STATED THAT WHILE DRIVING 60 MPH, THE VEHICLE STALLED. THE CONTACT MENTIONED THAT THE REDUCED ENGINE, STABILITY AND TRACTION CONTROL WARNING LIGHTS ILLUMINATED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT WATER PENETRATED INSIDE THE INSTRUMENT PANEL, CAUSING THE ELECTRICAL SYSTEM TO FAIL. THE TECHNICIAN SEALED THE AREA BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN BACK TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE WATER DAMAGE CAUSED THE ACCELERATOR PEDAL TO FAIL AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 107,000 AND THE CURRENT MILEAGE WAS 111,800.

REDUCED ENGINE LIGHT KEEP COMING ON WHILE DRIVING AND THE VEHICLE LOSE POWER WHEN TRY TO ACCELERATE. THIS HAS BEEN GOING ON FOR ABOUT 3 YEARS NOW ON AND OFF. WE HAVE BROUGHT THE VEHICLE TO GET REPAIRED MULTIPLE TIMES AND THE PROBLEM CONTINUES. THE THROTTLE BODY HAS BEEN CHANGED AND ALSO SENSORS BUT THE PROBLEM CONTINUES.