What year you have? I think that all the rears are the same no matter what year and this is how i got mine off.
pre 98 front.
1. jack up car
2. remove remove rear wheels(if nessecary, some people can squeeze in there) and fender linings
3. there are two screws on both side where the bumper meets the fender, remove them.
4. remove the bottom support bracket on each side.
5. between the headlights in the grille area is two push screws that hold the bumper to the healight bar thing-a-ma-jigger(black piece that the headlight housings sit in)
rear bumper:
1. jack up car
2. either 10 or 13mm socket, short not deep well
3. there are two nuts^^ of the left side of the bumper reinforcement and two on the right, loosen them but dont take fully off yet
4. remove rear wheels(if nessecary, some people can squeeze in there) and fender linings, at the corner of the bumper where it meets the fender area is one torx(well it was on mine, but not always the case with others) screw that need to be removed, repeat on other side
5. remove the nuts from the bumper reinforcement and slide bumper back.
I cant remember if the corners slide onto a hook or they are just screwed in on the side like explained above.
may be a lil comfusing but i think i covered it
oh and disconnect foglights if you have them. and time should be about 25 to 45 minutes max per bumper.