GM Service Manual Online
For 1990-2009 cars only

Notice: R-134a is the only approved refrigerant for use in this vehicle. The use of any other refrigerant may result in poor system performance or component failure.

The heating, ventilation and air conditioning (HVAC) system is designed to provide a comfortable environment inside the vehicle, regardless of the weather conditions. The HVAC system can be broken down into 4 major functional systems:

    • Air distribution system
    • Temperature control system
    • Refrigeration system
    • Heater system