OP,
Any reason clear bras business have been popping up everywhere? Sad fact of life is as otherhs have mentioned, the transition to water based paints, means a less durable base coat. It's not only a GM problem, Toyota, Honda, Ford too have issues with paint. Solution to your problem is if the dealer agrees to repaint your truck, and that's a big stretch, is to immediately pay the $1200 to cover your bumper, hood, a-pillars and roof with a good quality clear bra and not worry about your front end looking like it was hit with buckshot.. Check out X-Pel.