Guess I will add my truck to the list, sadly. Picked up a new 2017 crew cab, short bed LT Z71 last Saturday, could only test drive to 60mph and that was pushing it bad in that area. I hit interstate yesterday and the shakes start around 65 mph and by 70-72 it's BAD. I called the dealer, largest volume dealer in TN and the guy said to bring it in after I got 500 miles on it but he's never seen one truck with my problem, hard to believe. I go this Sat and already requested a loaner until mine is fixed, my dealer is an hour away so it's a pain.