I have a 2015 Silverado in Slate Grey still under bumper to bumper warranty for about another month. It just turned 32,000 miles and is immaculate inside and out....except for a spot of paint peeling on the left rear door of the Crew cab. The dealer quoted $633 to repair. I called GM and they say its not covered??? Whats a bumper to bumper warranty for?? There was not a chip there and its spreading.