Thanks guys; I have 4 doors and none of them have anything on that pin. The parts manual calls up a "anti rattle spacer" or something like that, but I had never seen one.
My guy that's helping me insists that there should be a bushing or something that can be supply upwards pressure to the vent frame to keep in in place as the other two bolts appear inadequate to the task, but I told him I had my doubts and that if there was a bushing, it wouldn't have been called an "anti rattle spacer", it would have been called a bushing, spring or spacer.
sounds like that pin just provides a locate and doesn't push up on the vent frame at all.
Dave