GM Service Manual Online
For 1990-2009 cars only

Object Number: 470587  Size: SH

The heater and A/C control is the vehicle operator's control point for the electronic air conditioning system. The heater and A/C control includes the following components:

    • Soft-touch buttons for the following system operating modes:
       - OFF
       - MAX A/C
       - NORM A/C
       - BI-LEVEL A/C
       - VENT
       - HEATER
       - BLEND
       - DEFROST
       - RECIRC
       - REAR DEFOGGER
    • A blower speed control lever
    • A temperature control lever

Operating mode buttons contain an LED indicator that illuminates when selected. The rear window defogger button also contains an LED indicator.

The heater and A/C control is the electronic air conditioning system's control center. The heater and A/C control sends commands to the system components that control the following functions:

    • A/C compressor operation
    • Airflow delivery
    • Air inlet operation
    • Air discharge temperature
    • Blower operation