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

Roof


Object Number: 305352  Size: LF
(1)C398 (Sun Roof In-Line to Body Wiring Harness)
(2)Body Wiring Harness
(3)Sun Roof Actuator and Sun Roof (Express Open) Module
(4)Sun Roof Module
(5)Sun Roof Switch Connector
Figure 2:

Sun Roof Component


Object Number: 388970  Size: LF
(1)Sun Roof Switch Connector
(2)Sun Roof Switch