TL* THE CONTACT OWNS A 2007 GMC ACADIA. THE CONTACT STATED THAT AFTER THE REAR LIFTGATE WAS OPENED, THE LIFTGATE CLOSED INDEPENDENTLY. THE CONTACT SUSTAINED AN ARM INJURY THAT DID NOT REQUIRE MEDICAL ATTENTION. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. 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 NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.