Chevrolet Light Duty Truck 1973 Service Manual page 42

1A-16 HEATER A N D AIR C O N D IT IO N IN G
C O M P O N E N T REPLACEMENT A N D REPAIRS
Since a detailed list of installation instructions is
included with the auxiliary heater unit, replacement
procedures will not be repeated in this section.
G Models-- When replacing heater
CAUTION:
hoses, maintain a 1-1/4" minimum clearance
Fig. 19--Control and Resistor Mountings
between the auxiliary heater core lines and the
exhaust pipe. Observe minimum clearances as
shown in Figure 20.
All Models-Draw hoses tight to prevent sag or
rub against other components. Be sure to route
hoses through all clamps as originally installed.
LIGHT DUTY TRUCK SERVICE MANUAL