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

Entertainment


Object Number: 1671290  Size: MH
(1)Radio Antenna Front Harness
(2)Radio Antenna Rear Harness
(3)Front RH Door Upper Speaker
(4)Front RH Door Lower Speaker
(5)Antenna Base Assembly
(6)Antenna Mast
(7)XM Digital Radio Reciever Antenna
(8)Rear RH Door Speaker
(9)Sub Woofer Module
(10)XM Digital Radio Reciever
(11)Audio Amplifier
(12)Voltage Inverter Assembly
(13)Rear LH Door Speaker
(14)Front LH Door Lower Speaker
(15)Front LH Door Upper Speaker
Figure 2:

OnStar


Object Number: 1488598  Size: MF
(1)Vehicle Communication Interface Module C1
(2)Vehicle Interface Unit Connector
(3)Vehicle Interface Unit
(4)Vehicle Communication Interface Module
(5)C303
(6)Vehicle Communication Interface Module C2
Figure 3:

Onstar Rearview Mirror


Object Number: 1501954  Size: SH
(1)Inside Rearview Mirror
(2)Automatic Dimming Photocell
(3)Onstar Indicator Light
(4)Emergency Call Button
(5)Onstar Button
(6)Call Button
(7)Electrochromatic mirror button
(8)Cellular Microphone