Reading through this thread (whew!), it seems that most people got their trucks stock with GoodYear tires. I wonder if the choice of tire is a regional thing or what.
I just bought a 2015(.5 I guess) GMC Sierra SLE. It is Crew Cab, 4X4, 5.3, 1K miles so far. It came stock with Bridgestone Dueler tires. I live in the Northern California area.
So far, I have not noticed any unusal vibration at any speed (knock on wood), or V8/V4 mode. I am concerned by the extent of this vibration problem though. I only came across this forum because of a reference on the Chevy Traverse forum because I also have a 2010 Traverse that just had the timing chain TSB done (that apparently is another GM horror story). It also came with Bridgestone Dueler tires.
So, I will continue to follow this thread and hope I don't end up with the vibration problem.