Well I tried to read most of the posts... but 202 pages is a lot. Here is what I got out of it. It can be almost anything, I have about 9000 miles and have felt the vibrations. I also sometimes get a loud clunk from somewhere in the middle of the truck when I either slow down to a complete stop or when I take off from like 3rd gear. I did rotate my tires and felt it even more then before. However, I think it was just the hype of getting a new truck that I talked myself out of it. But now.... I really feel it now... on roads that were just paved too. It does go away after turns on the high way though. I do not really notice it at low speed but when I have things in my cup holder they vibrate so much! I am going to try to put my dads 20's on off of his avalanche (Michelin tires) and see where that gets me.... if it is still there then it will go into the shop and the war will start.... For the guys that got buy backs.... did you get reimbursed completely and what happened after that? Also could you just upgrade to a 2500 diesel then?