TL* THE CONTACT OWNS A 2011 GMC ACADIA. AFTER OPENING THE REAR LIFTGATE DOOR AND LEANING INTO THE REAR AREA, A POPPING NOISE WAS HEARD BEFORE THE LIFTGATE DOOR SUDDENLY CLOSED DOWN. AS A RESULT OF THE FAILURE, THE CONTACT'S HEAD WAS STRUCK WITH THE LIFTGATE. THE CONTACT SUSTAINED SEVERE HEAD TRAUMA, WHICH REQUIRED MEDICAL TREATMENT. THE CONTACT INDICATED THAT THE VEHICLE WAS PREVIOUSLY SERVICED IN JUNE OF 2015 FOR NHTSA CAMPAIGN NUMBER: 15V415000 (STRUCTURE) TO PREVENT THE FAILURE FROM OCCURRING. THE LOCAL DEALER (GMC OF BEACHWOOD, 25975 CENTRAL PKWY, BEACHWOOD OH) AND THE MANUFACTURER WERE NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 65,000.