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

Blower Controls


Object Number: 1257896  Size: FS
Master Electrical Component List
Compressor Controls (Sirius D4)
Underhood Fuse Block - ABS, BLOWER, HORN, SUNROOF, DEFOG Fuses
G202 - 2 of 3
Rear Window Defogger and Heated Mirrors
Underhood Fuse Block - IGN 2 Fuse, Ignition Switch, I/P Fuse Block - DIS INJECTOR, ECM TCM, WIPER WASHER, and HVAC BLOWER Fuses
Compressor Controls (Sirius D4)
G202 - 2 of 3
Figure 2:

Compressor Controls - Sirius D4


Object Number: 1456583  Size: FS
Master Electrical Component List
Compressor Controls (MR-140)
Blower Controls
Instrument Panel Fuse Block - ABS, ENGINE Fuse
Engine Data Sensors - Pressure and Temperature
Figure 3:

Compressor Controls - MR-140


Object Number: 1630228  Size: FS
Master Electrical Component List
Compressor Controls (HV-240)
Compressor Controls (Sirius D4)
Instrument Panel Fuse Block - ABS, ENGINE Fuse
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Pump Controls and Fuel Injectors
Fuel Controls - EVAP Controls
G104
Figure 4:

Compressor Controls - HV-240


Object Number: 1630229  Size: FS
Master Electrical Component List
Compressor Controls (MR-140)
Fuel Injectors
Controlled/Monitored Subsystem References
G104