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

Forward Overhead


Object Number: 1508891  Size: LF
(1)Courtesy/Reading Lamp - LF
(2)Cellular Microphone (UE1)
(3)Sunroof Switch (CF5/C3Y)
(4)Courtesy/Reading Lamp - RF
(5)Dome/Reading Lamp (w/o C3Y)
(6)Sunroof (CF5/C3Y)
(7)Vanity Mirror Lamp - Right (DH6)
(8)Inside Rearview Mirror
(9)OnStar Keypad (UE1)
(10)Vanity Mirror Lamp - Left (DH6)
Figure 2:

Inside of the Left C-Pillar - Sedan


Object Number: 1265823  Size: MF
(1)Inflatable Restraint Roof Rail Module - Left
(2)C351 (UE1)
(3)Rear Window Defogger Grid - C1
Figure 3:

At the Right Rear Window Pillar (Sedan/Hardtop)


Object Number: 1265829  Size: MF
(1)Rear Window Defogger Grid, C2
(2)G301
(3)Inflatable Restraint Roof Rail Module - Right