I WAS DRIVING MY 2008 GMC ACADIA ALONG WITH MY SISTER AND HER TWO GOD CHILDREN. WE WERE AT A RED LIGHT AND PROCEEDED TO GO WHEN THE LIGHT TURNED GREEN. GOT UP TO 20MPH AND THE SUV JERKED SEVERELY. ONCE IT JERKED THE SUV WOULD NOT GO OVER THAT MILEAGE. WE WERE ALL SCARED! I TOOK THEM HOME AND DROVE TO A GM DEALERSHIP. I PAID $114.00 FOR A DIAGNOSTIC TEST AND WAS TOLD THEY DID NOT KNOW WHAT WAS WRONG. THEY SPECULATED THAT A WAVE PLATE BROKE OR MOVED. THEY ADVISED IN ORDER TO KNOW FOR SURE, I WOULD HAVE TO PAY 900.00 PLUS FOR A DEEPER DIAGNOSTIC! I'M UNDER MY 100K MILEAGE AND NO ONE IS HONORING THAT. I'M A MBA STUDENT AND DON'T HAVE THAT KIND OF CASH! I'VE ONLY HAD THIS SUV FOR 3 YEARS. I BOUGHT IT USED, HAD ONLY ONE OWNER BEFORE ME, AND IT WAS UNDER 20K MILES. SOUNDS LIKE GM'S PRODUCT IS NOT RELIABLE AND THEY DO NOT STAND BEHIND THEIR PRODUCT. I TRIED TO BUY AN AMERICAN PRODUCT TO PUT HELP OUR ECONOMY AND THIS IS THE REPAYMENT FOR IT! I'M GOING BACK TO FOREIGN CARS, I WILL NEVER PURCHASE ANOTHER GM BUILT VEHICLE AS LONG AS I BREATH! *TR