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

Overhead Console Components (C3U)


Object Number: 1867858  Size: LF
(1)Courtesy/Reading Lamp - Front
(2)Sunroof Shade Switch (C3U)
(3)Console Flood Lamp
(4)Garage Door Opener (UG1)
(5)Sunroof Switch (C3U)
Figure 2:

Sunroof Modules (C3U)


Object Number: 1863148  Size: LF
(1)Sunroof Shade Module
(2)Windshield
(3)Sunroof Control Module