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

Front Roof Line


Object Number: 827173  Size: LF
(1)Clearance Lamp-LF
(2)Roof Marker Lamp Harness
(3)Clearance Lamp Connector-LF
(4)Cellular and Navigation Antenna
(5)Roof Marker Lamp - Front Left
(6)Roof Marker Lamp - Front Middle
(7)Splice S345
(8)Roof Marker Lamp - Front Right
(9)Splice S303
Figure 2:

Cellular Microphone


Object Number: 874471  Size: MF
(1)Ambient Air Temperature Sensor - HVAC
(2)Cellular Microphone
(3)B-Pillar - Driver Side
Figure 3:

OnStar Button Assembly


Object Number: 869267  Size: MF
(1)OnStar Button Assembly
Figure 4:

Vehicle Communication Interface Module


Object Number: 819919  Size: MF
(1)I/P Harness
(2)Vehicle Communication Interface Module
(3)Vehicle Communication Interface Module-C3
(4)Vehicle Communication Interface Module-C2
(5)Vehicle Communication Interface Module-C1