you need a GM door spring tool to compress the door spring
and tape up your fenders and door edges to keep from scratching them up..
actually I used the garage rafters tied off to the door with 2 ratchets cords to support/hold the door
with the window rolled down !!
with the help of a floor jack while bushing were replaced
I think I used a towel on top of the floor jack ,underneath the door...
Change the bushings and PINS !!!, cause they wear out also..