Vibration when in V-4 mode only

[Cha0s13]

I took my 2016 in for the rumble, booming, and drone while in v4, service techs noticed it when driving. They pulled up a bulletin that said Gm engineers are aware of the issue and working on it, no TSB. So still no fix ;(

 

[Cha0s13]

One other strange thing I noticed is the drone, rumble, and booming are worse if your in v4 with your foot on the gas peddle. If my tahoe is in v4 while in cruise control (no foot on the gas peddle) the drone and rumble are barely there.