I WAS OUTSIDE OF THE PARKED VEHICLE AND I PRESSED ON THE BUTTON (KEY HOLE) TO OPEN THE BACK GLASS (WINDOW) AND IT BURST IN MY FACE GLASS SHATTERED EVERYWHERE FOR NO REASON. NOTHING WAS TOUCHING THE GLASS AT ALL. I HAVE TWO OTHERS WHO WITTNESSED THIS AND GM IS DECLINING MY REQUEST TO REPLACE IT. I FEEL THIS HAD TO BE A DEFECT IN THE GLASS I DIDNT DO ANYTHING TO CAUSE THIS TO HAPPEN OTHER THAN PRESSED ON THE BUTTON TO OPEN THE WINDOW.*AK