I have a 2020 2500 HD with this tailgate. I also have used Ford’s which works with a hitch. Might be the most epic Engineering SNAFU ever. Trailer hitch is used for more than towing, it protects your truck from folks running into it and backing into stuff. It’s also very difficult to install/remove the hitch with the sleeve needed for a standard hitch. GM should fire the designers, For this totally useless option. And to boot, everyone want to see it in action, so I get to explain this error about once a week. GM needs to design a hitch that works with it and send it to their owners free of charge.