GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Radio


Object Number: 817346  Size: LF
(1)Radio
Figure 2:

Rear Seat Controls


Object Number: 817533  Size: LF
(1)HVAC Control Module -- Auxiliary
(2)Rear Seat Audio (RSA) Control
Figure 3:

Video Disc Player and Rear Video/Audio HVAC Control Module


Object Number: 817618  Size: LF
(1)Rear Video/Audio HVAC Control Module
(2)Video Display Screen
Figure 4:

Rear Liftgate


Object Number: 1147390  Size: LF
(1)Speaker - LR Liftgate