NHTSA Complaint #11053926 — 2010 BUICK ENCLAVE

WHAT WAS HAPPENING WAS THE CAR WOULD JUST START DOWNSHIFTING BY ITSELF, SPEED WAS DRASTICALLY REDUCED. IT DIDN'T MATTER HOW FAST OR SLOW I WAS GOING BUT IT DID HAPPEN ON THE EXPRESSWAY AND I WENT FROM 65MPH TO 40 MPH IN A MATTER OF SECONDS. HAD BEEN HAPPENING FOR A YEAR AND HAS BEEN TO THE DEALER 5 TIMES, THIS LAST TIME THEY HAD IT FOR 7 WEEKS AND REQUIRED GM TECH CENTER SUPPORT TO FINALLY GET IT FIXED. THIS WAS NOT ONLY A SAFETY ISSUE BUT ALSO A FIRE HAZARD. FOLLOWING IS THE FIX: NEC TO CHECK OTHER DATA CIRCUITS THAT MIGHT BACK FEED INTO HIGH SPEED CIRCUIT. FOUND CIRCUIT #6060 BACK FEEDING IN TO CIRCUIT 2500 CAUSING ITERMITTENT COMMUNICATION LOSS. FOUND CIRCUIT OVERLOAD AT CONTACT POINT G110. WAS SERVING AS A CONTACT POINT FOR NINE CIRCUITS AND OVERHEATING, CAUSING HIGH RESISTANCE AND LOSS OF DATA COMMUNICATION AT TIMES. NECESSARY TO SEPARATE INTO 2 CONTACT POINTS TO REDUCE LOAD AND PREVENT OVERHEATING AND HIGH RESISTANCE THAT WAS CAUSING DATA CIRCUIT BACKFEEDING AND DATA LOSS. THEY SHOWED ME THE CIRCUIT WITH THE 9 WIRES THAT THEY REMOVED AND IT WAS ALL MELTED AND BURNT. NOT ONLY DID THE DRASTIC AND SUDDEN REDUCTION OF POWER CREATE A VERY UNSAFE SITUATION THE OVERHEATING OF THE CIRCUIT, BURNING AND MELTING OF WIRES CREATED A HUGE FIRE POTENTIAL.