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

Module Power, Ground, Serial Data and Blower Controls


Object Number: 1915390  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Temperature Controls
Figure 2:

Mode and Temperature Controls


Object Number: 1915392  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
A/C Compressor Controls (C67)
Module Power, Ground, Serial Data and Blower Controls
Figure 3:

A/C Compressor Controls (C67)


Object Number: 1915397  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Mode and Temperature Controls