Without Rear A/C

GENERAL DESCRIPTION
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 at the instrument panel.

This system consists of a separate core and fan unit mounted in the rear of the vehicle.

Heater hoses extend from the unit to the front of the vehicle where they are connected to the standard heater hoses with "tees." An "on-off" vacuum operated water valve is installed in the heater core inlet line in the engine compartment. This valve cuts off coolant flow to the auxiliary core during warm weather and eliminates radiant heat.

Two control methods are used;

WATER VALVE
When heat is desired, and the fan switch is any position except off, a vacuum operated water valve controlled by the switch, opens the water line to permit hot water circulation through the heater core. In the OFF position the valve is closed to prevent unwanted heat.

FAN SWITCH
The three speed fan switch is located in the instrument panel to the right of the steering column.