Vibration
That's killer the shop won't attempt to troubleshoot an issue until they have a TSB. Actually that's disappointing.
I don't have the vibration, 2011 model, w/20 inch wheels.
Do most of you all feel it when loaded or four or more people in it?
If so interesting that its only when the suspension is compressed some.
Putting on a lift and inspecting is only good if you look at close clearance items and see if things have actual rub marks.
Universal joints will cause vibration when traveling, not at standstill.
Does the vibration only occurs when in Gear ? Not while in Neutral ?
Never can tell, it could be a transmission cooling line that is close to the throttle linkage, if it only happens in gear. But wait, we are probably drive by wire, no linkage ? I will go look.
Is this occurring in 2wd models or 4wd only ? If its 4wd, there is a transfer case that adds complexity.
wouldn't that be wild if we figure it out on the forum here before a TSB

thanks
Parrott