TL* THE CONTACT OWNS A 2008 GMC ACADIA. WHILE THE VEHICLE WAS PARKED WITH THE LIFTGATE OPENED, THE LIFTGATE FELL CLOSED INDEPENDENTLY WITH FORCE AND STRUCK THE CONTACT ON THE HEAD. THE FAILURE RECURRED ON ONE OTHER OCCASION AND STRUCK ANOTHER PASSENGER ON THE HEAD. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 15V415000 (STRUCTURE), HOWEVER, THE PART TO DO THE REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 49,000.