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

Audio Amplifier


Object Number: 825552  Size: LF
(1)C355
(2)Body Harness
(3)Audio Amplifier
(4)Audio Amplifier Connectors
Figure 2:

Noise Cancellation Microphone


Object Number: 857322  Size: LF
(1)Garage Door Opener
(2)Noise Cancellation Microphone
(3)Overhead Console
Figure 3:

Radio


Object Number: 819865  Size: MF
(1)Radio
(2)HVAC Control Module
(3)HVAC Control Module-C1
(4)HVAC Control Module-C2
(5)Radio-C3-Not Used
(6)Radio-C1
(7)Radio-C2
Figure 4:

Radio Antenna


Object Number: 869378  Size: MF
(1)Radio Antenna
(2)Radio Antenna Bracket
(3)Coax Antenna Cable
Figure 5:

Rear Seat Audio (RSA) Controller


Object Number: 828480  Size: MF
(1)RSA Controller
(2)Heated Seat Switch-RR
(3)Accessory Power Outlet-RR
(4)Accessory Power Outlet-LR
(5)Heated Seat Switch-LR
Figure 6:

Speaker-Front Subwoofer


Object Number: 819984  Size: LF
(1)I/P Harness
(2)Speaker-Front Subwoofer Connector
(3)Speaker-Front Subwoofer
Figure 7:

Speaker-Left A Pillar Tweeter


Object Number: 819968  Size: LF
(1)Windshield Side Garnish Molding
(2)Speaker-Left A Pillar Tweeter Connector
(3)Speaker-Left A Pillar Tweeter Connector-I/P Harness Side
Figure 8:

Speaker-Left D Pillar Twiddler


Object Number: 825870  Size: MF
(1)Speaker-Left D Pillar Twiddler Connector
(2)Speaker-Left D Pillar Twiddler
(3)Body Harness
Figure 9:

Speaker-LR Door


Object Number: 827740  Size: MF
(1)Speaker-LR Door
(2)Speaker-LR Door Connector
Figure 10:

Speaker-RF Door


Object Number: 827338  Size: MF
(1)Speaker-RF Door
(2)RF Door Harness
Figure 11:

Steering Wheel Controls


Object Number: 851228  Size: MF
(1)Horn Switch
(2)Steering Wheel Controls
(3)Turn Signal/MultiFunction Switch