There have been so many people here with alignment problems with these trucks. I have a minor shake in my steering wheel at around 55 mph too, but haven't yet taken it in to get it checked out. The consensus here seems to be you need to make sure the tires are road forced balanced using a Hunter GSP 9700 machine with a Haweka adapter. Make sure your shop is using this machine, that it's calibrated and that the person doing the balancing is a trained tech not a part time high school kid. This guy put a good description to print and take with you.