Ok! I've been following this thread for a month or a couple of days after purchasing my Sierra. Yes, I have the vibration at 70mph +. I like others are (maybe) loyal to GM and have purchased many products with no issues. This is ridiculous for a 50k vehicle.
The truck has been to the dealer once and as others they did a road force balance after I referred to this forum. No dice still vibrates at HW speed. An appointment is scheduled to bring it back for further investigation.
I feel the same as most here, I want answers and don't plan on playing the game five or six times to fix the problem. Guess I need to spin up on the lemon laws. The first time the vibration started it was significant enough for me to pull over and inspect the truck, I thought the lug nuts were loose on one of the front tires.
Again I can't put into words how disappointed I am. I sold my corvette GS for this vibrating truck.
On another note is anyone else not satisfied with the Bose system, the Corvette system was great, not the same in the truck, larger cab maybe?
2014 GMC Sierra
4X4 short box crew
20" wheels
