My 2014 Silverado is doing the same. Turn directional on start switching lanes stabil trak comes on cruise shuts off and on warnings on dash come on and power steering loss . Its at the dealer cant duplicate this problem so they say I dont have a problem. Also lower power windows and cruise shuts off. Steering wheel jerked out of my wives hand in a parking lot at low speed, what would happen at highway speed? This truck is dangerous and they want me to take it home