NHTSA Complaint #10577696 — 2009 GMC ACADIA

IN SLOWING AT MANUAL STOP SIGN, THE ENGINE ACCELERATED (WHILE I HAD MY FOOT ON THE BRAKE) TO A VERY HIGH REVOLUTION--APPROXIMATELY 4,000 TO 4,500 REVS--AND I HAD TO PUT ALL OF MY LEG STRENGTH INTO PUSHING THE BRAKE PEDAL TO THE FLOOR, WHILE I HURRIED TO SHUT THE ENGINE OFF. ONCE I HAD TURNED THE IGNITION OFF, THE ENGINE DID SHUT DOWN THE WAY IT SHOULD HAVE. ONCE THAT WAS ACCOMPLISHED, I STARTED THE ENGINE UP AGAIN AND IT RAN WITHOUT ANY FURTHER INCIDENT. IT WAS A FEW MONTHS LATER BEFORE ANOTHER SUCH INCIDENT OCCURRED. THE SECOND TIME THIS SAME TYPE OF SITUATION OCCURRED UNDER VIRTUALLY IDENTICAL CIRCUMSTANCES, I TOOK THE VEHICLE INTO PAT MCGRATH GMC'S SERVICE DEPARTMENT AND EXPLAINED WHAT HAD HAPPENED. THE SERVICE MANAGER IMMEDIATELY DROVE THE CARE TO TEST IT, BUT NATURALLY THE CAR DIDN'T ACT UP. AT THAT POINT THEY ATTACHED A MONITOR TO IT AND TOLD ME TO DRIVE IT UNTIL THE PROBLEM RECURRED, BUT AFTER A WEEK OF NO SUCH PROBLEM OCCURRING, I HAD THEM REMOVE THE MONITOR IRONICALLY, THE PROBLEM OCCURRED UNDER EXACTLY THE SAME CIRCUMSTANCES THE NEXT MORNING. SO FAR I HAVE HAD THIS SAME EXPERIENCE RECUR APPROXIMATELY 6-7 TIMES AS I HAVE BEEN SLOWING DOWN TO STOP THE VEHICLE, THE ENGINE WOULD REV UP BADLY, BUT I ALREADY HAD THE BRAKE ON TO STOP IT, PUT IT INTO NEUTRAL AND SHUT IT OFF. ON RESTARTING IT DID SO PROPERLY AND THERE WAS A TIME LAG BETWEEN PROBLEMS. GMC IS NOW AWARE OF THE PROBLEM AS I HAD POSTED IT ON THE ACADIAFORM.NET. AT THEY POINT THEY HAD HAD NO OTHER SUCH ISSUES BROUGHT TO THEIR ATTENTION...