The contact owns a 2015 Chevrolet Silverado. The contact received notification of; NHTSA Campaign Number: 18V586000 (Steering), NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic), and 21V504000 (Air Bags). The contact stated that while parked and the vehicle powered on both sides torso air bags deployed without a collision. The driver sustained an ear injury. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was unknown.