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

Instrument Panel (I/P) - Right Rear


Object Number: 851791  Size: LF
(1)Instrument Panel (I/P)
(2)Vehicle Communication Interface Module (VCIM)
(3)Cellular Antenna Coax
(4)VCIM Connectors
(5)Navigation Antenna Coax
(6)Digital Radio Receiver (U2K/U2L)
Figure 2:

Antennas


Object Number: 851793  Size: LF
(1)Cellular and Navigation Antenna
(2)Cellular Antenna Connector
(3)Navigation Antenna Connector
(4)Front Roof Panel
Figure 3:

Overhead Console


Object Number: 851794  Size: LF
(1)Cellular Microphone
(2)Courtesy/Reading Lamps - Front
(3)C355
(4)Cellular Microphone Connector
(5)Overhead Console