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

Liftgate


Object Number: 1594553  Size: FS
Master Electrical Component List
Rear Hatch/Gate Ajar Indicator Description and Operation
Control Module References
Quarter Glass Windows - LWB
HVAC B, LGM/DSM, OH BATT/ONSTAR, and RADIO FUSES
HVAC B, LGM/DSM, OH BATT/ONSTAR, and RADIO FUSES
HVAC B, LGM/DSM, OH BATT/ONSTAR, and RADIO FUSES
SP205
SP306
G401, G402, and G403
Figure 2:

Quarter Glass Windows - LWB


Object Number: 1594555  Size: FS
Master Electrical Component List
Rear Quarter Window Description and Operation
Control Module References
Liftgate
Retained Accessory Power (RAP) Schematics
B+ Bus - Rear Fuse Block
G302 - 2 of 2
G302 - 1 of 2, G303, and G304
G306
Sunroof Schematics