I have a 2010 Silverado 4x4 5.3 went to the dealer to have warranty work done on my passenger mirror. Forgot to take out my tune from the pcm got truck back an noticed right away something wrong. So I plugged my I tune 1000 in and it could not connect to the vehicle. Went back in to the dealer and asked why they reprogrammed my pcm. There wasno autherization to do that wwork. The played dumb said they didn't do anything. I stayed cool an let them know I knew what they did. I calleddiablo an had my runner reset an updated. Works fine on everything else but won't work no my truck wtf?