Heater System

The heater system provides heating, ram air, power ventilation, and windshield defrosting. Outside air is drawn from the plenum at the base of the windshield into the heater module by the blower fan. Additional outside air, called ram air, is forced into the heater module by the forward movement of the vehicle. Within the heater module, the air is heated as required, and then routed through ducts to the proper outlets for discharge into the passenger compartment. A control assembly in the instrument panel allows the operator to control blower speed, mode of operation and temperature of the air coming from the heater system.

Auxiliary Heater (C36)

An auxiliary heater provides additional heating capacity for the rear of the Suburban model.

This unit operates independently of the standard heater and is regulated through its own controls in the instrument panel (Aux. Heater Models) or roof panel (Aux. Heater and A/C Models). This system consists of a separate heater core and blower fan unit mounted in the rear of the vehicle.

Blower Motor Control Switch

The auxiliary heater blower switch is located in the instrument panel to the right of the steering column (Aux. Heater Models) or the roof panel (Aux. Heater and A/C Models).