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

Power, Ground and Blower Motor Controls


Object Number: 1457725  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
A/C Compressor Controls
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses and PKLP Relay
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses and PKLP Relay
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
ABS, TRANS, ECM IGN, AIRBAG/DISPLAY, COMPASS, HVAC Fuses and STRTR Relay
BATT 3, BATT 4, ABS MTR, ABS SOL, ECM/TCM, WSW/RVC, and AUX PWR Fuses
LS4
Data Link Communication
Interior Lamp Switch, I/P and Driver Door Lighting
G202
G200
Figure 2:

A/C Compressor Controls


Object Number: 1457727  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Air Temperature Controls
Power, Ground, and Blower Motor Controls
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Fuse Block Underhood Bussing
Data Link Communication
LS4
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
G101, G112 (L26/L32), and G113 (L26/L32)
G101, G112 (L26/L32), and G113 (L26/L32)
G112 (LS4), and G113 (LS4)
Figure 3:

Mode and Air Temperature Controls


Object Number: 1457728  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Compressor Controls