You mentioned that the Vibration started when you had the New Rims and tires put on.If it where me I would take the truck back to the shop,and have them go for a ride with The New Rims and tires so they can see there is a problem.Then have them put on your Stock rims and tires that you mention have No Problem,go for a ride and see what they said.Them telling you its the truck is Bull****!!,if they