There is a bolt at the bottom of the rear seat, one on each side. This will allow you to remove the bench cusion as a whole unit. Then you will need to remove the seat belt anchor bolts. This will allow you to remove the seat back cusion as a whole. Then I believe you will see a couple of bolts that hold in the back deck cover, if no bolts, just grab it and pull forward, it'll release.
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Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.