red2mb

So I have this vibration. Bought the truck with 21 miles on it,and now have 6000. I brought it In for the oil change, and told them about the vibration. Thinking it would be a balance problem. They had it for 2 days with no fix. I have to bring it back on Monday for the to check out the rear end. Everything I have been reading there is no fix, so some dealers say it's normal other have no idea and have to bring in GM engineers. After paying so much money for a truck and GM getting so many complaints, from what I read starting in 2103 about the same issue. Why wasn't something done or said about the issue, before they keep selling a vehicle with this issue, and no fix. (From what I have been reading)