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

Entertainment Sub-System


Object Number: 787602  Size: LF
(1)Radio
(2)Speaker - RF Tweeter
(3)Speaker - RF Door
(4)Speaker - RR Door
(5)Remote Playback Device - CD Changer
(6)Speaker - RR Subwoofer
(7)Audio Amplifier
(8)Speaker - LR Subwoofer
(9)Radio Antenna Module Connector
(10)Radio Signal Coax Cable
(11)Front Windshield FM Antenna Coax Cable
(12)Radio Antenna Module
(13)Steering Wheel Control Switch - Left
(14)Steering Wheel Control Switch - Right
Figure 2:

Digital Radio Receiver


Object Number: 869373  Size: MF
(1)Digital Radio Receiver
(2)Digital Radio Antenna
(3)S402, S403, S404, S405