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

Blower Controls


Object Number: 1218111  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
A/C Clutch and Pressure Sensor
Battery Power to the Fuse Block, Starter, and Generator
LH HDLP,RH HDLP,HTD SEATS,BRAKE,PREM AUD, and BATT FEED Fuses
Ignition Switch
G203 and G205
Figure 2:

A/C Clutch and Pressure Sensor


Object Number: 1218110  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Actuators and the Evaporator Temperature Sensor
Blower Controls
Battery Power to the Fuse Block, Starter, and Generator
Ignition Switch
G101
Engine Data Sensors - 5 Volt References
G101
G103, G105, G107, and G207 - L81
Figure 3:

Actuators and Evaporator Temperature Sensor


Object Number: 1218681  Size: FS
Master Electrical Component List
Air Temperature Description and Operation
A/C Clutch and Pressure Sensor