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

Rear Defogger, HVAC Control Module, Window Defogger Grid, G400 and G200


Object Number: 363914  Size: FS
Rear Window Defogger Circuit Description
Cell 10: BRAKE and HTR-A/C Fuses
Cell 14: G200 (1 of 4)
Cell 14: G200 (1 of 4)
Mirrors Fuse, Heated Mirrors, Heated Mirror Relay
Cell 14: G400
Mirrors Fuse, Heated Mirrors, Heated Mirror Relay
Figure 2:

Mirrors Fuse, Heated Mirrors, Heated Mirror Relay


Object Number: 363912  Size: FS
Rear Window Defogger Circuit Description
Rear Defogger, HVAC Control Module, Window Defogger Grid, G400 andG200
Cell 14: G202 (1 of 4)
Rear Defogger, HVAC Control Module, Window Defogger Grid, G400 andG200