Chevrolet Light Duty Truck 1973 Service Manual page 90

1A -64 HEATER A N D AIR C O N D IT IO N IN G
The Overhead System is used in conjunction with the
Four-Season System. Since replacement of Four-Season
System components has been covered previously, only
those components peculiar to the Overhead System will
be covered in this section.
REAR DUCT
This duct covers the blower-evaporator assembly, at the
rear of the vehicle, and incorporates four adjustable air
outlets (fig. 70).
Replacement
1. Disconnect the battery ground cable.
2. Disconnect the drain tube from the rear duct.
3. Remove the screws securing the duct to the roof
panel.
4. Remove the duct from the side and rear retaining
flanges and remove the duct.
5. To install, reverse Steps 1-4 above.
BLOWER MOTOR RESISTOR
The blower motor resistor is located on the cover side of
C O M P O N E N T PART REPLACEMENT
OVERHEAD SYSTEM-C-K MODELS
LIGHT DUTY TRUCK SERVICE MANUAL