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

Rear Fascia Lighting


Object Number: 1631748  Size: LF
(1)Defogger Grid C2
(2)Center High Mounted Stop Lamp (CHMSL)
(3)Tail/Stop and Turn Signal Lamp - Right
(4)Backup Lamp - Right
(5)License Lamp
(6)Backup Lamp - Left
(7)Tail/Stop and Turn Signal Lamp - Left
(8)Defogger Grid C1
Figure 2:

Cellular Communication Components


Object Number: 1631577  Size: LF
(1)Cellular Microphone (UE1)
(2)Inside Rearview Mirror
(3)Onstar Button Assembly (UE1)
(4)Inside Rearview Mirror Lamps
(5)Antenna
(6)Cellular and Navigational Antenna (UE1/U2K)
(7)Remote Control Door Lock Receiver (RCDLR)(UE1)
(8)Vehicle Communication Interface Module (VCIM)(UE1)