Vibration/Shudder 2007 H3

[scotty1007]

I just bought a 07 H3 Last friday 7-20 noticed bad vibration when driving home on interstate, brought back the next day they said nothing was wrong, Brought back yesterday to have fuel door installed, tech took ride with me noticed it right away, they said it had two bad tires, changed then and still vibrating. I drove around 40 miles on different road conditions you can feel significant vibration in steering wheel.
O yea they were supposed to put chrome door handles and mirrors on for 500.00, I got there and they put this Putco Cap on there ,The handles and mirrors were supposed to be factory told them if I wanted that Chap caps I could have bought and installed myself for 150.00 at least they are going to put the factory chrome on. This concerns me about the vibration Next time will be the third time they are looking at this I have only had this Hummer one week