THE ISSUE IS ONLY HAPPENING ON 2011 I-4 2.4L ENGINES. MANY PEOPLE WITH THIS ENGINE (TERRAIN AND EQUINOXS FOR A COUPLE) HAVE THE SAME ISSUE. THE VEHICLE MAKES A RATTLING NOISE WHEN STARTING UP..ITS INTERMITTENT. ALSO I HAVE HAD (AS OTHERS HAVE) HAD THE CAR STALL AND GIVE AN CHECK ENGINE LIGHT WITH CODE P0011. THE CAR MAKES THE RATTLING WHEN CAR IS COLD OR HOT..I HAVE IT HAPPEN AT LEAST ONCE A DAY. GM HAD A TECH. BULLETIN OUT ON IT IN FEB.2011. THE FIX DID NOT TAKE CARE OF IT. IN JUNE 2011 GM PUT OUT ANOTHER TB SAYING 'THEY ARE AWARE OF THE ISSUE, HAVE NO FIX YET'.. AGAIN THIS IS HAPPENING ON ALOT OF THESE VEHICLES..AS OF RIGHT NOW, GM IS NOT HELPING ME WITH THIS..JUST THAT THEY ARE AWARE AND WILL LET ME KNOW..IN THE MEANTIME, IM DRIVING A NEW CAR THAT MAKES A HORRIBLE NOISE, I DON'T KNOW WHAT INTERNAL DAMAGE ITS CAUSING, AND IM AFRAID ITS GOING TO STALL AGAIN, IN TRAFFIC AND I WILL HAVE AN ACCIDENT... *TR