How do you get to the back speakers in a 1994 Oldsmobile Achieva?

Start by climbing into the trunk and locating the three metal clips in the back, one in the middle and one each of the far sides. You'll need two people for this project. Have the person in the trunk use a screwdriver to lift up the clips while another person in the back seat of the car pulls the seat toward them. Once all the clips are off the frame, you can pull the seat down. Carefully lift up the thing in the back (don't know what it's called, above the seat and under the window, you'll notice it's directly above the speakers) so not to tear it. Once that is lifted you should be able to see the top of the speakers. Now's the fun part of trying to undo all the screws in a relatively tight space. Once the screws are gone, lift the speaker up and down through the hole. Then simply slip the new speaker through the same hole and fasten the new screws. Keep in mind the speaker are 6"x9" and as long as you get that size, they will fit perfectly (it's a wonderful thing!)