Thanks. I figured it out yesterday. I looked at my other door to see where the nut was. You have to loosen the door handle housing then put the nut in place and screw in.
I bought this truck a few months ago. Seems they did not put a screw in on the rear door handle to keep it from falling off. Which it did. I ordere the handle housing that has the screw and nut. Ordered new door handle. The issue is the screw won’t tighten up. I also don’t know how to install the nut for the screw. Does anyone know how to install the nut? Thanks