Chevrolet Light Duty Truck 1973 Service Manual page 41

EXISTING HEATER
WATER VALVE
Fig. 1 7 - W a t e r V alve In s ta lla tio n - G M o d e l S how n as
in the core inlet line). During the summer months, this
valve should be placed in the "off" position.
Fan Switch (Fig. 18)
The three speed fan switch (LOW-MED-HI) is located in
(110" W.B. WITH REAR SEATS)
CONTROL SWITCH
Fig. 1 6 -A u x ilia ry H e a te r In s ta lla tio n s (G M o d e ls )
IN S T A L L V A L V E W IT H A R R O W
P O IN T IN G A W A Y F R O M TEE.
O R IE N T V A L V E S O '■ O N '" 'O F F "
IS VISIB LE
T y p ic a l
HEATER A N D AIR C O N D IT IO N IN G
AUXILIARY HEATER
AUXILIARY HEATER
(110" W.B. WITHOUT REAR SEATS)
(ALL 125" W.B. MODELS)
Fig. 1 8 -A u x ilia r y H e a te r C o n tro l
the instrument panel, to the right of the steering column.
Fully up, the blower is inoperative; fully down the
blower is on HI.
1A-15
LIGHT DUTY TRUCK SERVICE MANUAL