The contact owns a 2011 Chevrolet Silverado 1500. The contact stated that while the vehicle was parked, unoccupied, and turned off, the front passenger’s side air bag deployed. Prior to the failure, the air bag warning light had intermittently illuminated. The contact stated that there was no impact to the vehicle that would have caused the air bag to deploy. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 115,000.