The speaker is screwed in to the panel covered with the upholstery, the fabric is stapled to the panel, the panel is stapled to the end cap and the edges are covered with trim.
I carefully pried the trim off with a putty knife and screw driver, then the panel, they used a bunch of staples to hold the fabric and foam on so I pulled them out to gain access to the speaker screws. After that the only issue ws to find replacement speakers that would install to the same depth as the orignals. staple the cloth back and reinstall it back the way it came out, I put a small drop of wood glue in the staple holes and pushed the old staples back in where they were orginally. Check to make sure you match the resistance of the old speakers with the replacements.
Sounds great now!
'00 34' Classic Limited (LOVSHAC)
'12 3500HD, 4x4 LBZ D/A CC LB