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

Front Center of Roof


Object Number: 1318845  Size: LF
(1)Front Windshield
(2)Right Front A-Pillar
(3)Cellular Antenna
Figure 2:

Roof/Headliner


Object Number: 1206302  Size: LF
(1)Inside Rearview Mirror
Figure 3:

Center of the I/P


Object Number: 1215122  Size: LF
(1)Cellular Antenna
(2)Vehicle Communications Interface Module (VCIM) - C1
(3)Vehicle Communications Interface Module (VCIM) - C2
(4)Vehicle Communications Interface Module (VCIM)
(5)Navigation Antenna
Figure 4:

Top Left Side of Rear Package Shelf


Object Number: 1317459  Size: LF
(1)Electronic Compass Module
(2)Navigation Antenna