Dropped off my truck today for the fuel tank replacement, right rear factory 20" rim asking for too much tape weight (3.25oz) just that one wheel, and the vibration issue at 75-80mph/ center seat counsel shaking. That's the only issue I'm having and hope they find a solution but with 711 pages of GMC/ Chevy having vibration issue I doubt it... I've read it all, tourqe converter, drive shaft replacement, rims and tire replacement, ring and pinion I believe, clamps on the leaf spring helping out, axle shaft out of specs, replacing rear end with yukon rear end, **** the list goes on and on. I like my truck a lot, and I would love to keep it for years to come but driving on a long road trip and avg 75-80mph will be a pain in the ass... One of my old friends who still works for GM, I asked him about this issue and he knows about it. He ordered a driveshaft for the customer and still had the vibration issue with no fix, he also drove a loaner vehicle which also has the same issue! Did he fig it out, sadly no. But he as a GM tech knows about the vibration issue. GM really screw up on this issue and continued to sell it with the same problem, 2014, 2015, 2016, and also read 2017 still vibrate. Hope I'm wrong but I don't think my dealer is going to figure it out and No Problem found or unable to duplicate the issue which is bs.