Hi everyone im new to this site and I am having trouble with my Trailblazer its an 04 I6 LS. I noticed it started shaking not to much but i can notice it and when i have the AC on it shakes a bit more and turns off on me. I took it to the dealer about a year ago and they cleaned the bodythrotle but it started up again like if the idle is not right... Any advice please...:undecided