WHILE DRIVING ON THE INTERSTATE, I HAD TO BRAKE QUICKLY BECAUSE OF ACCIDENT AHEAD. AT THIS TIME, THE STABILITRAK SERVICE MESSAGE AND BRAKE MESSAGE STARTED ALTERNATELY FLASHING ON DIC. BRAKE AND STABILITRAK WARNING LIGHTS ALSO CAME ON. THE CAR DECELERATED LIKE WHEN YOU SHIFT DOWN ON A MANUAL TRANSMISSION WHEN I TRIED TO ACCELERATE AGAIN, NO RESPONSE. TRIED TURNING STABILITRAK BUTTON BACK ON AND OFF, BUT THIS DID NOTHING. AFTER A FEW SECONDS THE CAR STARTED TO ACCELERATE, THE ENGINE LIGHT CAME ON. I WAS IN HEAVY TRAFFIC AND WAS DIFFICULT TO GET OVER TO SHOULDER. I HAD ABOUT 10 MILES TO GET TO MY HOUSE, SO WATCHED THE ENGINE TEMP GAUGE, AND MADE IT HOME. ENGINE LIGHT REMAINED LIT. THE ENGINE GAUGE INDICATED THE CARS TEMPERATURE ROSE ABOUT 15 DEGREES ABOVE WHAT IT USUALLY IS .STARTED THE CAR THE NEXT DAY WITHOUT ANY WARNINGS OR MESSAGES DISPLAYED AND TOOK THE CAR TO MY MECHANIC, HE RAN THE CODES ON CARS COMPUTER. IT SHOWED NO ERRORS,WAS A LITTLE LOW ON WATER. HE SAID TO DRIVE IT AND LET HIM KNOW IF IT HAPPENED AGAIN. THE VEHICLE HAD BEEN IN OPERATION FOR ANOTHER 45 DAYS, WITH NO MORE SIGNS OF PROBLEMS. 46TH DAY, THE VEHICLE'S SERVICE MESSAGE FOR STABILITRAK AND BRAKE FLASHED AGAIN, WITH WARNING LIGHTS FOR THESE COMING ON AS WELL, AFTER CAR WAS DRIVEN APPROX. 4 MILES AND PARKED FOR ABOUT AN HOUR. THE VEHICLE OPERATED FINE. I PARKED THE CAR AGAIN FOR ABOUT ONE HOUR, WARNING LIGHTS CAME ON AFTER ABOUT A MILE THE NEXT DAY THE SAME EPISODE. NOW I'M INTO THE 2ND WEEK OF THE BRAKE AND STABILITRAK WARNING LIGHTS COMING ON AND OFF. WILL CALL THE DEALER BECAUSE AT THIS POINT I'M AFRAID OF ANOTHER GEAR DOWN LIKE THE FIRST INCIDENT AND BEING IN HEAVY TRAFFIC-THAT'S NOT SAFE HOWEVER, I'VE BEEN TO THE DEALER BEFORE ABOUT THE PASSENGER AIRBAG SENSOR SAYING IT'S OFF WHEN THERE IS A PASSENGER SITTING THERE. CHECKING CARS COMPUTER SAID ?CODES? SHOWED NOTHING WRONG? ARE THE "CODES" INFALLIBLE? *TR
2008
UNKNOWN OR OTHER
I NOTICED THAT WHEN DRIVING ON AN EXPRESSWAY AND WOULD ATTEMPT TO PASS A SLOWER MOVING VEHICLE, AS I WOULD MOVE INTO THE PASSING LANE AND ATTEMPT TO ACCELERATE, THE CAR WOULD HESITATE FOR A FEW SECONDS, LOSE SPEED, THEN SUDDENLY DOWNSHIFT AND ACCELERATE AT AN UNEXPECTED RATE. I ALSO NOTICED THAT THE CAR WOULD UNEXPECTEDLY ACCELERATE OR DECELERATE UNDER NORMAL DRIVING CONDITIONS. I BOUGHT THE VEHICLE TO THE DEALER FOR REPAIR, THEY RESPONDED THAT THEY COULD FIND NOTHING WRONG, BUT THE WHAT I WAS EXPERIENCING WAS CHARACTERISTIC OF THE 6-SPEED TRANSMISSION ON THE VEHICLE. THE PROBLEM CONTINUED AND I FOUND IT DANGEROUS. I RETURNED THE VEHICLE AND THE DEALER'S REMEDY WAS TO "RESET THE TRANSMISSION COMPUTER." DURING THIS TIME, I ALSO NOTICED THAT THE "SERVICE STABILITRAC AND TRACTION CONTROL" WARNING WOULD COME ON. ONSTAR RECOMMENDED I SHUT OFF THE ENGINE TO RESET THE SYSTEM. I FOUND THIS ONLY HAPPENED WHEN I FIRST USED THE CAR IN THE MORNINGS TO GO TO WORK. AGAIN, THE DEALER SAID THERE WAS NOTHING WRONG AND THE COMPUTERS WERE SHOWING NO CODES -- THEY ALSO STATED THAT THEY COULD NOT DUPLICATE THE PROBLEM. I GOT THE CAR BACK FROM THE DEALER AND IT HAPPENED AGAIN - AT 7:00 AM. I CALLED ONSTAR AND THEY GAVE ME TWO CODES. I BOUGHT THE CAR BACK TO THE DEALER AND GAVE HIM THE CODES. IT NOW SEEMS THAT THERE WERE TWO DEFECTIVE SENSORS CONTROLLING THE STABILITRAC / TRACTION CONTROL SYSTEM AND HOW THEY COMMUNICATE WITH THE TRANSMISSION. I WAS TOLD THAT GM IS CHANGING MANUFACTURERS ON THE SENSORS. I HAVE NOT HAD USE OF THE CAR SINCE THE BEGINNING OF JUNE AND AM STILL WAITING FOR GM TO PRODUCE THESE PARTS. IN THE MEANTIME, UNEXPECTED ACCELERATION, DECELERATION, AND GEAR SHIFTING WAS OCCURRING UNDER ALL DRIVING SITUATIONS CAUSING -- IN MY MIND -- A DANGER TO MYSELF, MY PASSENGERS, AND OTHERS. THE DEALER HAS HAD THE CAR ON FIVE DIFFERENT OCCASIONS SINCE JUNE 8. THIS LAST SERVICE THEY HAVE HAD THE CAR SINCE JULY 20. *TR
