WHEN THIS VEHICLE IS PARKED FORWARD ON A SLIGHT INCLINE THE TRUNK LID BOUNCES, WHEN OPENED BY THE REMOTE. BOTH MY WIFE AND MYSELF HAVE BEEN HIT ON THE HEAD, I RECEIVED A SLIGHT LACERATION. THIS IS A DANGEROUS SITUATION. SOMEONE CAN GET A CONCUSSION. WE HAVE GONE THROUGH ALL OF BUICK'S CHANNELS OF COMPLAINT.*AK