2017 silverado 2wd noise and vibration

[stevenkadams74]

Hello, i need some help from everyone i have a 2017 silverado 2wd, i bought in nov. when it swiches from 4 cylinder to 8 cylinder it make a horible noise in the transmission area and it vibrates, it has been at the dealer for the past 3 months, they replaced transmission, exhaust, rear, balanced drive shaft, motor mounts, cab mounts, still does it, gm engineers came and said it was normal for this truck, last week it got so bad that it sounds like a machine gun going off under truck and when i get home i see a nice stain on driveway of trans fluid, does anybody have a 2107 crew cab with 5.3 with same issue? 

[Colossus]

If it is dropping fluid that should be a no brainier for the dealer to fix, keep pressing on that at least.. Welcome to the vibration prone 2014-2018 models