You running stock size tires?
Im looking at dropping my AWD as well, but these vibration issues scare me, let us know what you can figure out, beautiful truck btw.

 

Yes, stock tire, 275/55/20.
Thanks.

 

Sharp truck. Only exterior changes I'd make would be demolding and throw a lot of tint on that bad boy.

 

It will be going in for tint before summer. I forgot how hot a black interior gets here (previous Tahoe had tan interior). Molding will likely stay since it is my daily and people around here dgaf about other people's stuff in parking lots. I try to park away from everyone else but sometimes that's not an option.

 

Clean truck buddy.

 

I think I may have found my high speed vibration. I was doing 100K maintenance a couple weekends ago and found the front differential full of silver mud. Doing a little research, the 8.25 IFS differential eats carrier bearings due to the bearing retainer design. The AWD more so due to being engaged all the time. So it looks like I will be pulling the differential and freshen up the bearings in the near future.

 

Fingers crossed that's it. Vibrations like that drive me nuts!

 

I have done two sets of front diff carrier bearings in 80k miles. It is definitely an issue with the awd front axles.

 

Bumping this.. was this your issue afer all? Also, anyone know what can be done to prevent this from happening?

 

Ideally, but not easily, changing the angle of the differential would solve the issue.