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HEATER AND AIR CONDITIONING 1A-67
Fig. 94—Camaro Four-Season Ducts
Heater and Air Distributor Assembly
Removal
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1. Disconnect battery ground cable.
2. Drain radiator (do not purge refrigerant system).
3. Disconnect all connectors attached to the Comfortron
wiring harness which are on the engine side of the
firewall. Push the wiring harness grommet through
the firewall to the rear.
4. Disconnect the four vacuum hoses coming from the
underdash through the large firewall grommet. Push
the hose grommet through the firewall to the rear.
5. Remove the nuts from the heater and air distributor
case studs which project through the firewall from
the dash side.
6. Disconnect the heater hoses from the core tubes.
Under Dash
1. Remove glove box assembly.
2. Remove the dash center face plate, ash tray assem-
bly, and any radio and/or tape equipment.
3. Remove the Comfortron control assembly mounting
screws and lower the control unit.
4. Remove the vacuum line from the kick pad valve
diaphragm.
5. Disconnect all harness connectors between the Com-
fortron harness and the rest of the dash wiring.
6. Remove the air distributor duct which supplies the
dash outlets.
7. Remove the screws attaching the heater and air
distributor to the firewall.
8. Pull the assembly rearward then down to remove
from the dash. Pull the Comfortron wiring harness
and vacuum hose assembly through the firewall.
Installation
1. Place the entire case assembly with wiring, vacuum
hoses, and control assembly into the car on the floor.
2. Pass the underhood wiring harness and vacuum hose
harness as far as possible through the appropriate
firewall holes.
3. Lift the assembly up into position and pass the case
studs through the firewall mounting holes. Attach
the case to the firewall with the mounting screws.
4. Mount the dash outlet air distributor duct to the face
of the case.
CHEVROLET CHASSIS SERVICE MANUAL
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