Without Air Conditioning

Fig. 15 Heater module assembly exploded view. 1982---88 Full Size exc. Riviera & models with A/C:

REMOVE
1. Disconnect negative battery cable, resistor and blower motor wires.
2. Disconnect heater core ground strap from dash panel.
3. Drain cooling system and disconnect both heater hoses.
4. Remove seven screws attaching heater and blower case to plenum case, then remove case.

NOTICE: The heater temperature air valve can be removed at this time by disconnecting valve cable and tapping hinge pin down until it clears the upper pivot, then lift valve and hinge pin out of lower pivot.

5. Remove four screws securing heater core shroud, then shroud and core.
6. Remove core mounting screws and clamps, then separate core from shroud.

INSTALL
1. Reverse procedure to install. Replace sealer as necessary during installation to prevent air and water leaks.