KMan1967

I think the biggest is the multiflex tailgate. Included with Convenience I on the WT, Convenience II on the LT, Convenience I on the LTZ, and standard on the HC (at least on the Canadian Order book). Other than that just some new colours, a new 20" wheel option, and something about seatbelt loops. It is such a pain removing the current tailgate - must be a real joy removing that multiflex.

That's the one. https://static.nhtsa.gov/odi/tsbs/2021/MC-10187756-9999.pdf There is also a version on the GM upfitter site where the aspect ratio of the photos aren't messed up. https://www.gmupfitter.com/files/media/photo/1466/UI Bulletin_170.pdf

I don't have anything to suggest, but you aren't alone on this. I'm waiting on a 2021 3500HD Silverado that I'll be using for a slide-in. The first project is the 360 camera nonsense. I was hoping that they would have fixed the issue after the 2020s, but there is an updated Technical Service Bulletin that includes 2021 model year. My plan is to generally take the approach of the TSB, but to try to get some use out of the camera - either a mount around the plate area (ick) or ideally behind the access slot for the tailgate wire. FOV will be far from perfect but better than a black screen. Also curious to see on the harness if there is a separate camera connection for the hitch view camera and whether that can somehow be used for a high mounted camera on the back of the slide-in. During this whole ordeal I am hoping that the main connection can be relocated to make it easier to swap the harnesses.