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

HVAC Control Module and Blower Controls


Object Number: 1562570  Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Air Delivery and Temperature Controls
AIR BAG, AMP, BCM 2, BCM 3, CLSTR, EPS/STR WHL CNTRL, HVAC/IP IGN, HVAC/PK3+, and WPR Fuses
AIR BAG, AMP, BCM 2, BCM 3, CLSTR, EPS/STR WHL CNTRL, HVAC/IP IGN, HVAC/PK3+, and WPR Fuses
Defogger Schematics
B+ Bus Bar - 2 of 2
G305 (1 of 2)
G305 (1 of 2)
Figure 2:

Air Delivery and Temperature Controls


Object Number: 1562573  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Compressor Controls
HVAC Control Module Power and Blower Controls
Figure 3:

A/C Compressor Controls


Object Number: 1562577  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Air Delivery and Temperature Controls
B+ Bus Bar - 1 of 2
G101 and G102
High Speed GMLAN
G101 and G102