GM's new drop down tailgate issues. I found out the hard way you can't use the dropdown while you have a ball in the receiver. The hitch hits the tailgate just above the latch on tailgate. First time you step on it, it puts a ding in it. Worse was while at the dealer for service I showed them and asked if it might be a covered repair since it's a design flaw. I got the answer I pretty much knew -NO. The service guy stopped a salesman and ask if there was a warning or anything in the owners manual. He laughed and said no but there should be, he has seen this before. Anyway, I wanted to post something as a warning / heads-up to new GM buyer who have the new tailgate. Well and to complain a little cuz my truck with less than 4000 miles on it has a ding I have to pay to repair. If I never towed my flatbed I would have never known - so be warned & don't let it be you next time.