I bought my 2014 a few weeks ago, 50k miles, it was bought new up North before me. I didn't even think to look under the truck until this past weekend. The whole frame is rusted or spotted with rust. Wondering what I should do about it if anything... I didn't buy it at a Chevy dealership, but could I take it to one to see what they say? It's not a new truck so I dunno if TSB or whatever applies, haha.