This is coming from me, an ex Tundra owner.
Look man, I am not trying to slight anybody that has a vibration issue but if you think that Ford/Dodge/Toyota is immune from this problem then I have an amazing bridge I would love to sell you.
This is going back some years but before dealerships had the large service departments they had now they used to farm out a lot of the work. During that time Ford had a terrible vibration problem in a few of their models. The "fix" was to swap out the customers Firestone tires for Michelins. For the majority of the vehicles this fixed the problem or masked it, for some others it did not. My family's shop made a killing swapping out tires on these vehicles. Sound Familiar ??
Yes, my 2014 Silverado had a vibration issue at 73-80 mph. Yes, my problem was made better by tires. I am sorry for others that have not had their vibration issues solved with tires. That being said, I knew I would have tire problems as soon as I saw the truck had Goodyears tires on it. I literally cringed when I saw it. Low and behold, they were so out of round that 2 of them got thrown in the dumpster for new ones. As a common saying in the tire business goes, Goodyear has never had one good year, ever.
The percentage of people that have a vibration is very small. The only ones you hear about are from the people on here who make up a fraction of the Silverado owners. There are thousands and thousands of owners driving around vibration free. In fact we had three 2014/15 Silverados in the shop today for oil changes and I asked every single one and they all had the same answer, their ride was smooth as glass.