Sheet metal provides a level of protection, this problem jeopardizes the integrity of the vehicle and should be determined a safety issue by GM. Sheet metal separation seems like a big fix which will include possibly welding, sanding, painting and interior carpentry work. I think GM conducted R&D on the problem but hoped customers wouldn't notice until they could fix the problem on subsequent models. Good on you Luvgmc, at this point you are probably the only one that loves GMC
Tahoe and Yukon are in the cross-hairs right now, Escalade may soon follow. But I think jasondenali15 may be correct, "I am starting to think this is a bigger issue for 2015". Post all the details received from GM so the other folks can fast-track the process.