Just FYI. If you notice that the door doesn't line up with the trim line on the door panel, there is an adjustment immediately under a trim panel on the end of the dash. I had that problem and it took three years before a conscientious tech called Chevy. It appears there was a secret bulletin that addressing it,. My problem was on the driver's side. The tech told me he popped the panel, pushed down on the dash, and tightened the bolt.