2015 Yukon Denali

[rook]

Just purchased a 2015 Yukon Denali. Looking around here there seem to be things to look out for.

 

1. Stutter at specific RPMs?
2. Cabin noise

 

These two resonate with me - during my test drive I didn't notice it, but yesterday when I was driving the truck home I thought a window was opened, however no window was opened. This sounds like a pretty serious issue that popped up on 2014 on this forum. The Stutter only happened once, didnt know if it was because the truck was switching from the v8 to the 4c?

 

Are there other things to look out for?