GM Service Manual Online
For 1990-2009 cars only

Ducts and Outlets

The mode control knob operates the air flow control doors. The doors route the heated, unheated, fresh, or recirculated air through the following ducts and outlets:

    • The right IP duct
    • The left IP duct
    • The center IP duct
    • The right side window defroster duct
    • The left side window defroster duct
    • The windshield defroster nozzle duct
    • The center floor duct
    • The right IP louver
    • The left IP louver
    • The center IP louver
    • The right side window outlet
    • The left side window outlet
    • The right windshield defroster nozzle
    • The left windshield defroster nozzle

Body Ventilation

The body ventilation system provides the passenger compartment with fresh, outside air which is routed through the same vents as the heated air.

The primary fresh air intake is located within the cowl panel. Air is drawn into the interior of the vehicle from the intake grill and is drawn out from the ventilator outlets in the body quarter panels.