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:

OnStar and XM Radio Antenna


Object Number: 1686525  Size: MF
(1)Antenna Base
(2)Connector to Harness
(3)Windshield Opening
(4)A-Pillar -LH
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