the sliding door fell off of my 1992 caravan. need help putting in back on. thank you.

Still need help? If so, are both tracks off?

Same thing happened to my 95 T&C. Had to replace the middle roller assembly. (The part that rolls under the side window). The part of course came unpainted or unprimed from the dealer, so I asked my body man about painting it. He said it would be fine unpainted, and you can only see it if the door is open, so I put it on like that and yes it has been fine. Hope this helps.