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For 1990-2009 cars only
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Figure 1:

Power, Ground, and Blower Motor Control
Object Number: 1888346 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
A/C Compressor Controls
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
BATT 4, ABS MTR1, ABS MTR2, AIR PUMP, AIR SOL, AUX PWR, Radio Fuses, and PWR/WNDW Circuit Breaker
HDLP MDL, DISPLAY, LT SPOT, and RT SPOT Fuses
ECM IGN, TRANS, PWR DROP/CRNK, AIRBAG/DISPLAY, STRTR, FUEL/PUMP, and HORN Fuses
Power, Ground, and Low Speed GMLAN Serial Data
Radio, HVAC Control Module, Driver Information Center (DIC) Switch, and Steering Wheel Controls
G201
G202, and G204
G200
Figure 2:

A/C Compressor Controls
Object Number: 1888349 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Air Temperature Controls
Power, Ground, and Blower Motor Control
Fuse Block - Underhood Bussing
Fuse Block - Underhood Bussing
EMISSIONS 1, EMISSIONS 2, A/C CMPRSR Fuses, and A/C CMPRSR, FAN 1, FAN 2, and FAN 3 Relays
Power, Ground, and Low Speed GMLAN Serial Data
Power, Ground, and Low Speed GMLAN Serial Data
G113, and G115
Figure 3:

Mode and Air Temperature Controls
Object Number: 1888351 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Compressor Controls