Here's a post from a previous thread. Possibly it will help.j I'm considering replacing the speaker in my '98 LE also, so let us know how the job goes.
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======== Just remember the speaker covers are attached to the rear shelf tray, not the speakers themselves, and you'll damage something if you try to remove them.
You need to remove the whole rear shelf tray itself to access the bolts that hold down the speakers
Start by removing the rear seat cushion--just pull up firmly at the front edge where the cushion meets the floor on the left and right side. Next, you may need to also remove the C pillar trim panels on either side of the rear window.
Then unbolt the two side bolsters for the seat back and fold down the seatback halves. Remove the center mount stoplight (instructions are in the bulb replacement section of your owner's manual). Pull the tray toward the front of the car, leave the shoulder harnesses alone.
You won't be able to remove it completely but should have enough slack in the belts so you can get it out of the way of the speakers. I'm sure your '97 is the same as my '99 and there should be 3 screws holding down the OEM speakers. If you go with after market 6x9s you will have to drill four new holes. It's no big deal if you have a 90 degree angle drill, because the rear window makes it tight. But if you don't I'm sure you can manage with a regular drill. Then you would reverse the procedure to reinstall everything. ========
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