SO to follow up on my post- I took mine in and after a few hours of them making phone calls and checking things out- GM corporate told them it was the Steering wheel and airbag- and that it would need a new set. parts on back order for 3 weeks- apparently they have a lot of them to replace. I talked to them about the safety and asked if they could guarantee that the system would work, and they got on the horn to GM again- IT was decided that they shouldn't let me leave with the truck since they couldn't guarantee my safety. Now I'm in a little 4 cylinder buick until the part comes in and is safety tested. No truck during deer season and christmas- can't haul or tow anything, can't get to the ranch without 4WD either... FRUSTRATING!