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

HVAC Control Module


Object Number: 606200  Size: FS
Heater Blower Controls Components
HVAC Air Delivery/Temperature Control Circuit Description
A/C Compressor Clutch Relay
BRAKE and HTR-A/C Fuses
BRAKE and HTR-A/C Fuses
A/C Compressor Clutch Relay
Front Ventilation Controls (1 of 2)
Handling ESD Sensitive Parts Notice
G103 and G104
G104 Diesel
A/C Compressor Clutch Relay
G200 (4 of 4)
G200 (1 of 4)
G103 and G104
Figure 2:

A/C Compressor Clutch Relay


Object Number: 606202  Size: FS
Heater Blower Controls Components
HVAC Air Delivery/Temperature Control Circuit Description
HVAC Control Module
ECM-B, HORN and A/C COMP Fuses
ECM-B, HORN and A/C COMP Fuses
IGN E Fuse
IGN E Fuse
IGN E Fuse
HVAC Control Module
HVAC Control Module