I have a new 2021 Tahoe with the Sunroof which seems solid overall, with the exception of a Strange Metallic rattle noise at the back side of the Sunroof.. Only happens while driving down residential streets that are not as smooth as highways. I also noticed that when the shade to the sunroof is retracted its much worse.. Anyone experiencing the same issue and found a fix? I had it at the dealer the next week to have them add a trailer brake and asked they check out the rattle as well... He said that he drove it and did not hear a rattle and had never heard of this issue.. I'm sure he just drove it slowly around the lot.. Frustrated! Thx