TURN SIGNALS FAILED TO WORK. THIS IS AN INTERMITTENT PROBLEM. THE SELECTED SIGNAL DOES NOT FLASH WHEN THE TURN SIGNAL IS ACTIVATED AS IF THE BULB IS BURNT OUT. WENT TO THE EXPENSE TO REPLACE BULB THREE TIMES, BUT, THE BULBS WERE GOOD. AFTER REPLACING BULB THE SIGNAL STILL DID NOT WORK. AFTER, SEVERAL WEEKS IT WOULD START WORKING AGAIN. A MONTH OR SO LATER THIS HAPPEN AGAIN AND TOOK TO DEALER AND AGAIN THE BULB WAS REPLACED THIS TIME THE BULB WAS BURNT OUT. THE SIGNAL WORKED FOR 2 MONTHS AND WENT OUT AGAIN. I WILL NEVER PURCHASE ANOTHER GM CAR. MY DEALER CALLS IT THE MYSTIFYING CAR. THIS IS A MANUFACTURING DEFECT THAT GM WILL NOT ADMIT TO. SHAME ON GM, NO WONDER AMERICANS ARE GOING FOREIGN. THE COST TO REPLACE THIS BULB IS $85.00 EACH TIME.