Welcome to Justanswer
Can you offer up any suggestions?
Yes the issue is one of a few and the dealer that did the work should work with you since they did not fix the problem
There is a known issue with the engine mounts on this truck causing vibration there are new mounts that fix the problem your having
If the mounts are not the issue then I suspect failing shocks they cause cupping on the tires
Let me know if you have any questions
I will have the dealer look into this mount issue. Is this an official GM service bulletin that you have sent? Also, How can the shocks be verified good or otherwise?
They can inspect them to see if they are no longer within spec and yes its a GM bulletin
So please hit the accept button so I can receive payment for my time and effort its greatly appreciated and the only way I get paid. Thanks Danny
Today they are changing the front wheel bearings. Lets see what that does. As I sat in the passengers seat for the ride with the mechanic the vibration was much worse. I will keep you posted so you may help others if this issue should occur for anyone else.