While driving home 12-13-19 I smelled burning wires and there was smoke in the cab. Quickly shut off truck opened doors to let smoke out and the rear window exploded. I called GM to report the incident and after 7 weeks and two dealer visits I was told that I was on my own. My truck is still under the 3 year 36k bumper to bumper warranty and should be covered under warranty. I have purchased over 30 new GM vehicles but with this shotty customer service this will be my last! New rear window is $1000 seems like a small price to pay to loose a previously brand loyal customer. Worst customer service ever!!