i have a '15 & have had not experienced this issue.
16's & 17's still have issues, but supposedly fewer than 15's
resolution is just as varied & complicated as the GM checklist for this issue.
so from reading a few forums, some of the more common fixes have been:
-get rid of bridgestone tires for something quality
-road force balance wheels
-change out front &/or rear driveshft
-disable AFM w/ either range device or a tune
-change body mounts (this is new update on 17's)
You have heard complaints from folks with 17 model? I am hoping this is not the case re the buffeting/vibration.