I have had my 2019 Silverado for a few months now. I bought it new at the end of last year.
I have taken it to a local dealership and they don't hear anything and blame it on a "slushy" sound from differential and said it was normal. I just shook my head.
Every time the truck has sat for about 24 hours or so and get in and drive off, a rubbing sound is heard from the rear-end. I have had my wife drive slow and walk next to it several times an tried to isolate he noise.
Problem is that after driving it for a few miles the noise goes away.
I saw a post about the leaf springs. I have not looked yet, but curious if other have had a similar thing happen and if so, what did you do to fix it?