Frame Rust problems of the 2014 Chevrolet Silverado

I'm really disappointed in how my truck is rusting. It has the amount of rust that I would expect to see on a truck after 7 - 10 years. The truck's underbody including the frame is rusting everywhere. For a truck that has only 6,000 miles on it this is ridiculous. Whatever was sprayed on the frame is just peeling off in chunks. I had the dealership in anoka, main motors look at this when I got an oil change today and they agreed the rust is excessive but gm has told them to do nothing about it based on pi0281d. Gm claims this is supposed to be the most rust resistant truck ever.