Dealer is ordering new GMC Light that shines under rear tailgate to allow handsfree open. Also had them look at Water spraying in when the sunroof is opened due to wet Wind deflector. They said it was twice as big as previous models, it is bigger but that doesn't explain front passengers getting sprayed with water. I gave them the Technical Service Bulletin 20NA219 about drains needing to be extended, but that said they weren't aware of that and would check into it (I Printed the entire thing out for the repair and parts with pictures) Looks like I will have to take it in myself next time.