I have a 1982 Buick riviera drivers door is sagging it seems upper hinge has play how would I replace the bushing and pin .any help would be appreciated. I have a Buick repair manual but says nothing about door adjustment .

 

If the pin and bushings are worn, some places like NAPA sell pin and bushing kits. I don't know of any places that sell the bushings individually. Maybe you might have some luck with a local body shop that has the kit and will sell you the individual pieces..

A small "C" clamp and a few spacers would help to remove the worn pieces.