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

Heater-A/C and Rear Defogger Control Assembly


Object Number: 801477  Size: FS
HVAC Components
HVAC Compressor Controls Circuit Description
A/C Compressor Clutch Relay
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Power Distribution Schematics
Ground Distribution Schematics
HVAC Blower Control Schematics
Data Link Connector Schematics
Figure 2:

A/C Compressor Clutch Relay


Object Number: 284938  Size: FS
Heater-A/C and Rear Defogger Control Assembly
HVAC Components
HVAC Compressor Controls Circuit Description
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Power Distribution Schematics