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No issues here with either buffetting or vibration at highway speeds.Tahoe LT with 20's no sunroof. I do notice the roof above the front seats deflects easily when washing the truck.
Oh yeahHighway speeds being above 75 right?
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I don't feel it when in v8. It does suffer when in v4.
Comical to see some of the misinformation in here. Someone thinks that people are making these issues up so they can dump the truck? Makes perfect sense. I picked up my 2016 Yukon XL Denali on 9/15/15. My dealer has been fantastic but ultimately ran out of things to try to fix both issues. I've driven 12+ Yukons (Short and XL), Tahoes and Suburbans and EVERY SINGLE ONE had the buffeting issue and only ONE didn't have the vibration issue. Someone also mentioned that folks aren't used to the cabin pressure in a large SUV. Really? Give that a rest, please. Going into a submarine or ascending in an airplane, ok. I'll give you the cabin pressure thing. A car that people spend hours a day in? No. It's not normal. No other large SUV has it. No other car I have ever driven has had it. I ALMOST went with a black one today but felt like I was settling on the color since the vibrations didn't exist. I pulled back and my dealer is bringing in the one I want by end of week. If you get a chance, take a look at my Facebook group. It's small but there are some interesting folks joining (who aren't just owners). www.facebook.com/groups/GMissues
Check out the article on autoguide.com. They were the ones that took my information and ran with it. Now, all of the rags have latched on including a story tonight from a station in Detroit. I emailed that reporter with my specific history and he said, "man, I wish I had spoken to you prior to my story airing."
If you don't have the issue(s), go enjoy your ride. You are one of the lucky ones. You have a great truck. If I didn't love the redesign and our lifestyle needs hadn't coincided with the redesign I wouldn't have put up with this for a week. Fact is, I LOVE the Yukon Denali's and want to find a truck that operates as it should. Good luck, everyone.