Has anyone here actually spent some time working on their trucks to find the issue for the vibration? If you look at the leaf springs, GM put blocks in the rear of these trucks, I'm guessing which is why they have so much rake, and probably helps with payload. I had a Tacoma a couple years ago that I lifted, and used blocks in the rear end, but the blocks in that lift kit were angled, and they came with shims to further angle the rear axle up or down to keep the driveline in line. I know there were low speed vibes (10 or lower) with my Tacoma that were caused by the lift - the vibes were corrected by using a carrier bearing drop kit, to keep the 2 piece driveshaft straight, and not at a weird angle. Basically, I'm wondering if shims or a custom driveshaft would solve our issues. There are only so many things it could be, and I really like my truck BESIDES this frigging vibration. If I could fix it myself, I'd rather just drive out my lease instead of losing a shitload of money on trading it in, or having them mock me with their retarded buy back offers...