Tailgate Latch problems of the 2013 GMC Yukon

The contact owns a 2013 GMC Yukon. The contact stated that while driving approximately 65 mph, the rear tailgate opened independently. The failure had occurred on several occasions. The battery warning light was illuminated. The contact stated that while driving at approximately 55 mph, the vehicle lost automotive power. The contact pulled over to the shoulder lane and attempted to shift to park(p); however, the vehicle failed to shift to park(p). No warning lights were illuminated. The vehicle was towed to a dealer, where it was diagnosed that the transmission needed to be replaced. The vehicle was repaired. The vehicle was taken to a dealer to be diagnosed; however, the dealer stated that the failure of the battery light being illuminated was unknown. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.