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

Right A-Pillar-Top


Object Number: 852199  Size: LF
(1)Sunroof Opening
(2)Front Roof Panel
(3)Cellular Microphone Connector
(4)C353
Figure 2:

Right A-Pillar-Middle


Object Number: 852200  Size: LF
(1)Right A-Pillar
(2)Sunroof Relay