The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that upon commencing to drive at various speeds, the tailgate would open without user intention, and remain open despite attempting to shut close via the interior controls. The local dealer was contacted and confirmed the VIN was not included in the NHTSA Campaign Number: 24V060000 (LATCHES/LOCKS/LINKAGES). The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 65,000.