DeltaSierra

I have brought my 21' Trail Boss in to dealerships. They have stated "Can not duplicate concern," and that they've never heard of this issue. I brought in the TSB that applies to 2020 models but they are saying until GM updates it to 21' they can't do anything. At 10,000 miles, I now have the dreaded window leak. They are replacing the window so I'm hoping that will do something to alleviate it.

Not sure if the GMC ones are different? These were the ones I got from Chevrolet Accessories.

Well, it looks like I just joined the acorn drop sound club. My May manufactured 2021 Trail Boss just started doing it. My last 19' Silverado was a repurchase due to the 8 speed, and now this one has had engine problems, noisy leafs that they can't seem to fix, and now this. The sound is annoying the hell out of me. I know if I take it to the dealer it will just be a "could not duplicate concern." Anyone have any luck with a fix?

This. I've only had the truck for days and I've already used it quite a bit. It's not perfect. It has some things that could have been designed better, but it gets used. I'd go for it.