Vacuum T A N K; Circuit Breaker; Overhead System -G Models; Blower-Evaporator S H R O U D - Chevrolet 1977 light duty truck Service Manual

3. Disconnect the electrical harness at the switch.
4. Remove the switch from the refrigerant line.
5. To install, reverse Steps 1-4 above.
N O T E: Use a new " O " ring coated with clean
regrigeration oil, when installing switch.
6. Evacuate, charge and check system opeation.
V A C U U M TA N K
Replacement (Fig. IB -61 )
1. Raise the hood.
2. Disconnect the vacuum harness at the tank.
3. Remove the tank attaching screws and remove
the tank.
4. To install, reverse Steps 1-3 above.
C IR C U IT BREAKER
T he entire air conditioning system is protected by a
45 am p circuit breaker located on the left side of the
dash, in the engine com partm ent.

OVERHEAD SYSTEM -G MODELS

This system is used in conjunction with the C60
system. Since replacement o f the C60 System C om po ­
nents has been covered previously, only those com po­
nents peculiar to the Overhead system will be covered in
this section.
BLO W ER-EVAPO RATO R SHRO UD
This shroud covers the blower-evaporator at the rear
o f the vehicle, and incorporates four air outlets.
Replacement (Fig. IB -63 )
1. Disconnect the battery ground cable.
2. Disconnect the d rain tubes at the rear corners of
the shroud.
3. Remove the screws securing the shroud to the
unit and roof panel.
Fig. IB -6 2 -C irc u it Breaker
Fig. IB-63-B low er-E vaporator Shroud (G Overhead System)
4. Remove the shroud from the side and rear
retaining flanges and remove the shroud.
5. To install, reverse Steps 1-4 above.
BLOWER M O T O R ASSEMBLIES
Removal (Fig. IB -6 4 )
1. D isconnect the
compressor clutch connector.
2. Rem ove the blow er-ev ap orato r
outlined previously.
3. Remove the blower motor ground straps at the
center connector between the motors.
4. Disconnect the blower motor lead wires.
W ARNING: Before
screws, support the lower case to prevent
damage to the case or motor assemblies.
battery gro und cable and
shroud
removing the case
as