I recently saw some surface rust in the chrome on the bumper of a fairly new major brand pickup. Went to the dealer lot, and noticed about half of them on the lot with similar rust - bad chrome job.
You have to admit that the rust issue has largely been solved these days, compared to 20-30 years ago when you saw 5 year old cars with huge holes in the fenders.
I can understand your frustration with a "developing" rust spot on a 1 year old car, but you do have a warranty for rust through, and the company will honor it. In other words, they will meet the obligation they've made to you - - you are getting what you paid for.
Sorry, but I'm not sure "GM's obligation" is what people come to expect from turning over years of their hard-earned cash.
GM won't replace the full-sized chrome bumpers that I think you are referring to. The dealer's directive is to send the bumper out for a re-chrome. Tie up the vehicle for a week or 2 for a re-chrome is a horrible way to earn customer loyalty. If the dealer provides a loaner car, then the cost of that will exceed the cost of a new bumper if the plating shop is backed-up. Stupid stupid stupid!
As long as we're on the truck subject, the late 90's early 00's full sized 5.3 and 6.0 (I think) had poorly-designed pistons that would slap horribly. GM's position was that they would not reoair the issue because they claimed that it had no long termeffect on the engine. So I guess they figured a clunking engine should be acceptable to someone who just spent 30 or 40 large on a new truck. Again, GM execs should look into the mirror to see why their market share has dwindled over the years.
Seems like they took too much cost out of too many vehicles and their decisions are coming back to haunt them. Ditto for Ford and Chrysler.