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

Overhead Console


Object Number: 1802893  Size: LF
(1)Courtesy/Map Lamp - Left
(2)Cellular Telephone Microphone (UE1)
(3)Courtesy/Map Lamp - Right
(4)Sunroof Switch (CF5)
Figure 2:

Entertainment Components


Object Number: 1804256  Size: LF
(1)Vehicle Communication Interface Module (VCIM) (UE1)
(2)Radio
(3)Antenna - Base
(4)Speaker - RF (Tweeter) (UW6 or WBM)
(5)Speaker - RF
(6)Video Display Console (U32)
(7)Speaker - RR
(8)Cellular/Navigational/Digital Antenna (UE1/U2K)
(9)Speaker - Subwoofer (WBM)
(10)Amplifier (WBM)
(11)Digital Radio Receiver (U2K)
(12)Speaker - LR
(13)Speaker - LF
(14)Speaker - LF (Tweeter) (UW6 or WBM)