Gmjunky

In my case as far as the booming goes, it depends how you, or at what point you catch the engine/chasi/wheels I don't know what. At the same exact stop sign, accelerating to get on the freeway every other time or so, it will boom like a mother and nothing will make it stop, slowing down, accelerating more, nothing, it just keeps booming until a complete stop is made. Weird man, weird. Hope they fix it on the 2017s cos I'm gone to start going back in for another buy back.

Both, the 2015 (that got bought back) and the new 2016 both have the 20 and both have the same issues, booming and vibrating. Wheel size doesn't have anything to do with the issues. So what does? GM

Ok here it is; They did the roof thing, twice, they did the 2 tire replacement thing, they did the shock thing they did the rear end thing, they could not figure out the picoscope thing, they washed it with recycled water, they vacuumed with a straw and they replaced it with a 2016. There is no fix for this thing, or at least there is no fix that they are willing to do. Here is my process for getting a buyback http://www.gm-trucks.com/forums/topic/175222-2015-gm-suvs-buffeting-ear-pressure-noise-in-cabin/

Hold on there? I washed my SUV and it fixed the problem, it goes faster too. My SA apparently spoke with GM and they told him they are working on the 6th gear via software update. Post the information please, who, where, how? Thank you,

Going in today for the noise in cabin issue, and loose driver seat, and vibration at speed, and disintegrated rear passenger headrest, and who knows what else.

Ok, I'm not crazy. I will stop going to the shrink and start going to the dealer, again, for yet another issue. Great, I can't wait. Yes, I have the same issue and it is driving me crazy, so I apologize in advance for my rants, my car made me do it. I take it there is no fix for this yet, and will have to endure the parts changing stage at the dealer.

Guess I can't post pic's Ohhh well

Here goes

Subscribed as well. I'm interested to know if I can do this on 2014 Sierra.