So I'm a first time poster on here. Been aware of this chevy shake but just now really got the itch to get a new truck so I went out for a test drive. Hit the Chevy dealer first. 2018 CC LT Z71 with a leather interior. 10 miles on it. Transmission was clunky in the parking lot but smooth out on the road. Got it up to 70-75 mph on the highway and.....there's the vibration. I couldn't believe it. It wasn't as bad as the stuff out on youtube but it was definitely there. I was looking all over for imperfections in the road but it was smooth. It was a huge disappointment. I love the interior and the look of these trucks but I would feel like I'm gambling $40k hoping I don't get the shakes if I bought one. It's really turned me off from Chevy/GM. I had a Cruze diesel before and before I unloaded it I was making monthly trips to the dealer. They gave me a Silverado as a loaner once and I fell in love with it but after this most recent experience I am leaning more towards the F150 with the 5.0 (no ecoboost for me)