castronova

I read through most of this. Has anyone determined the solution? Its NOT the tires. Been in the closet on this issue because I lowered my 2014 sle crew cab 6ft bed using Mcgaughy's kit professionally installed and 22" replica wheels. I had the driveline raised to eliminate driveline vibration and all was good for a few months. Then the day I picked the truck up from scheduled service at my gmc dealer it vibrated from 65-75 in what felt like the rh rear. Thinking the dealer rotated the tires, I went down the tire path. Yes, balancing, force balancing rotating, replacing tires and replacing wheel. Nada ladies. Its not tires or wheels. So I thought I was stuck, no way the dealer was going to help resolve a vibration after I lowered the truck. Then I read this post. Somewhere in the middle a member says it happened after he picked it up from the dealer and thought it was an update. Sounds familiar but other than that I have nothing. I do have a cool looking gmc shake weight.