Your best bet is to go register at Autozone and look at their repair manual and see if it lists the procedure. I think it will. Looking at my copy of the factory manual you have to remove the entire side panel to get at it. It says you have to remove these components first:

1. Side Door Scuff Plate (left side)
2. Rear Door Weatherstripping (left side)
3. Back Door Weathestripping (again...)
4. Back Door scuff plate

Then the trim panel has to come out, which it doesn't give in detail, but if it's like the right side, you need to:

1. Remove the seat belt bolt
2. Remove the cargo net hooks (the center part pulls out a bit to loosen the hook)
3. Remove the lamp cover that shines on the sliding door and disconnect the lamp connector
4. Start to pull out the panel. It apparently has 16 clips.

 

Thanks dandaman,
Your summary is what I needed to confirm my suspicions. That speaker is really layers of parts deep into the sequence of removal items! Got to replace/fix the driver's window system first and a regulator arrives tomorrow.. will try first without replacing motor since it will take 10 days after ordering. Then on to the radio speaker soon as next predicted rain days pass.
Thanks again.. was hoping there was a shortcut more directly to the speaker that I was overlooking.