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

Cellular Communication Components (UE1)


Object Number: 1631942  Size: LF
(1)Inside Rearview Mirror (ISRVM)
(2)Automatic Dimming Photo Cell
(3)OnStar Indicator Light
(4)Emergency Button
(5)OnStar Button
(6)Cellular Microphone
(7)Call Button
(8)Electrochromatic Mirror Button
(9)Electrochromatic On Indicator
(10)Antenna Assembly (Navagation, Ostar, Digital Anetenna )
(11) Coax Connector
(12)Rear Defogger Connector C2
(13)Splice S309
(14)Ground G304
(15)Vehicle Communication Interface Module (VCIM)
(16)Onstar GPS Coax Connector
(17)VCIM Connectors
(18)Cellular Antenna Coax Connector
Figure 2:

Cellular Antenna


Object Number: 1631743  Size: LF
(1)Antenna Assembly (Navagation, Digital Radio, and Cellular) (UE1/U2K)
(2)Rear Window