VEHICLE CAME OUT OF PARK SITTING IN DRIVEWAY WHILE BEING CLEANED OUT. THE KEY WAS NOT IN THE IGNITION; HOWEVER THE GEAR SHIFT WAS SHIFTED INTO PARK AS SOMEONE REACHED OVER ACROSS THE SEAT. PASSENGER SIDE DOORS WERE OPEN AND AS THE VEHICLE ROLLED , THE DOORS HIT MY POUCH CAUSING DAMAGE TO THE FRONT AND REAR PASSENGER DOORS. MY CHILDREN HAD TO JUMP OUT OF THE WAY TO AVOID BEING RAN OVER. THERE IS A SERIOUS DEFECT ON 2011 ACADIA AND THE RESULTS COULD HAVE BEEN DEADLY. I NEED FOR GMC TO FIX THIS PROBLEM. THE GEAR SHIFTER IS NOT SUPPOSE TO MOVE WITHOUT THE KEY IN THE IGNITION AND TURNED TO THE ON POSITION PLUS THE BRAKE MUST BE PUSH TO ACTIVE. SO GMC WHAT HAPPEN? I COULD BE BURYING ONE OF MY CHILDREN. THE DAMAGE IS OVER $2300 AND I HAVE A $500 DEDUCTIBLE NOT INCLUDING THE COST TO FIX WHY THE GEAR SHIFTER WAS ABLE TO MOVE. I NEED TO BE MADE WHOLE ($500 DEDUCTIBLE REIMBURSEMENT AND MY GEAR SHIFTER PROBLEM FIXED). MILEAGE AT TIME OF INCIDENT WAS 71,796.