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

Switches


Object Number: 2080600  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Passenger Compartment Lights
Fuse Block - Underhood Bussing
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
G301
G302 (2 of 2)
G202, and G204
G202, and G204
Figure 2:

Passenger Compartment Lights


Object Number: 2080603  Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Switches
Fuse Block - Underhood Bussing
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
Release Systems Schematics
G200
G301
G301