Well I joined the club of tailgate issue yesterday, with my 2021 Denali Black Diamond. Mine was a bit more painful. It opened on its own while parked in my garage. Came hope and pressed the opener in my other car and the tailgate and the door fought it out. Tailgate came out on the loosing end. Deep scratches as well as a hole in the top edge. I was able to get video of it doing it again yesterday. Moved it last night and of course it stops. At the dealer this morning and they look at me like I have lost my mind. Nothing in the GM system showing such an issue, etc. I gave them Bill's information and a link to this site. Dropping it off next week for them to have to take a look. Be interesting to see their response to the damages and who will pay for the repair. Pretty sure I know.