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

Rearview Mirror. Rear Defog Switch


Object Number: 1469249  Size: MF
(1)Body Control Module (BCM)
(2)Rear Defogger Switch
(3)Inside Rearview Mirror
(4)Cruise Control Switch
(5)Cruise Control Module
Figure 2:

Rear Defog Grid


Object Number: 1469248  Size: MF
(1)Rear Window (Glass Antenna)
(2)Rear Defroster
(3)Radio Antenna Module