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

Heater A/C Control Assembly


Object Number: 473437  Size: FS
HVAC Components
HVAC Compressor Controls Circuit Description
A/C Compressor Clutch
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Tail/Stop Lamps
Interior Lights Dimming Schematics
Air Temperature Control
Figure 2:

A/C Compressor Clutch


Object Number: 473440  Size: FS
HVAC Components
HVAC Compressor Controls Circuit Description
Heater A/C Control Assembly
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice