Air Flow Control Box - Heater

Heater Plenum Assembly

Removal

1. Disconnect the battery ground cable(s).
2. Remove heater hoses from core tubes and plug hoses. Please refer to Heating and Air Conditioning/Heater Core/Service and Repair/ Service and Repair
3. Remove the heater blower assembly. Please refer to Heating and Air Conditioning/Blower Motor/Servie and Repair/Service and Repair
4. Remove the remaining nuts which secure the plenum to the dash panel on the engine side of the panel.
5. In the passenger compartment, remove the instrument panel. Please refer to Body and Frame/Interior Trim/Dash Board/Service and Repair/ Service and Repair
6. Pull plenum rearward from the dash panel and remove from the vehicle.






Installation

1. Position the plenum to the dash panel, aligning the studs with the holes in the panel.
2. Install the nuts on the plenum studs at the dash panel in the engine compartment (one stud is located below heater core tubes and one is located at the bottom of the plenum).
3. Install heater blower assembly. Please refer to Heating and Air Conditioning/Blower Motor/Servie and Repair/Service and Repair
4. Install the heater hoses on the heater core tubes. Please refer to Heating and Air Conditioning/Heater Core/Service and Repair/ Service and Repair
5. Install the instrument panel. Please refer to Body and Frame/Interior Trim/Dash Board/Service and Repair/ Service and Repair
6. Connect the battery ground cable(s). Check the system for proper operation.

NOTE: On vehicles equipped with EEC, when the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the EEC processor relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.