So my 2013 silverado gear indicator doesnt work. The Truck runs and drives and goes through all gears. But When I put into reverse my backup lamps dont turn on, neither does the camera. At night When I unlock the truck the lights turn on even backup lamps so I know the circuit is fine. My park assist doesnt work and neither does the cruise control or the remote start, im assuming its related? Anyone had this issue before? or know what the problem might be. Thanks!