Control Assembly; T Em Perature Door Cable A D Ju Stm E N T; Master Switch And/Or Blower Switch - Chevrolet 1981 Light Duty Truck Service Manual

Fig. 1B-31 --Air Inlet Valves (C-K Models)
5. Remove the actuator to valve nuts and separate the
valve and actuator.
6. To install, reverse Steps 1 th ru 5 above.
CONTROL ASSEMBLY - C-K SERIES
Removal (Fig. IB-32)
1. Disconnect the b attery ground cable.
2. Remove the radio as outlined in Section 8 of this
m anual.
3. Remove the instrum ent panel bezel.
4. Remove the control to instrum ent panel screws and
lower the control far enough to gain access to the

control assembly.

Be careful not to kink the bowden cable.
5. Disconnect the bowden cable, vacuum harness and
electrical harness at the control.
6. Remove the control.
7. If a new unit is being installed, transfer the m aster
blower switches to the new control.
8. To reinstall, reverse Steps 1 th ru 6 above. C heck
control operation.
TEMPERATURE DOOR CABLE ADJUSTMENT - C-K
MODELS
1. Remove glove box and door assembly.
2. Loosen the cable attaching screw at the selector duct
assembly.
3. M ake sure the cable is installed in the bracket on the
selector duct assembly.
4. Place tem perature lever in full CO LD position and hold
while tightening cable attaching screw.

MASTER SWITCH AND/OR BLOWER SWITCH -

C-K SERIES
The m aster switch is located on rear of the control
assembly.
Replacement
1. Disconnect the battery ground cable.
2. Remove the instrum ent panel bezel.
3. Remove the control to instrum ent panel screws and
allow control to rest on top of the radio.
4. Remove the switch to control screws, disconnect the
electrical harness (and vacuum harness on m aster
switch) at the switch and remove the switch assembly.
5. To install a new switch, reverse Steps 1 thru 4 above.
VACUUM TANK
The vacuum tank is m ounted to the engine side of the
dash panel above the blower assembly (Fig. IB-33).
AIR CONDITIONING IB-41
LIG H T T R U C K SERVICE M A N U A L