AlSeli

I have a 2025 Sierra 5.3l and I'm wondering if it's normal for it to shake/vibrate at idle? It's been to the dealer 4 times and they acknowledge there is a vibration. They submitted a TAC case with GM and conducted a bunch of tests only to come back and say there is no issue with the truck. The vibration is mostly noticeable while in drive and stopped. I feel it in the floorboard, seat, and see the steering wheel shake along with drinks in the cupholder. When I put it in neutral, reverse, or park it seems to smooth out. Any insight is appreciated