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

Right Side of Rear Roof Rail


Object Number: 491307  Size: LF
(1)Antenna Module (RPO U77)
(2)Rear Window Antenna (RPO U77) Connector
(3)C395 (Inline Antenna)
(4)Rear Window Defogger Grid Connector
(5)C399 (Inline to Body Wiring Harness)
Figure 2:

Center of Instrument Panel


Object Number: 491308  Size: LF
(1)Radio Connector
(2)Radio
Figure 3:

Rear Radio Control Module


Object Number: 624352  Size: LF
(1)Rear Radio Control Module
(2)Radio/HVAC Control Assembly -- Auxilliary
(3)Center Floor Console
Figure 4:

Rear Defogger/Radio Noise Suppressor Component View


Object Number: 623861  Size: LF
(1)Radio Noise Suppressor Wire
(2)Rear Defogger Grid Connector
(3)Bolt
Figure 5:

Lower Inside of Door


Object Number: 491303  Size: LF
(1)Tweeter (RPO UQ3)
(2)Tweeter Connector
(3)Front Door Speaker Conector
(4)Front Door Speaker
Figure 6:

Rear Package Shelf


Object Number: 491301  Size: LF
(1)Rear Speaker
(2)Rear Package Shelf
(3)Rear Speaker Connector