Removal
Fig. 20 Upper A/C Housing Components:
Fig. 21 Lower A/C Housing Components:
NOTE: The heater-A/C unit must be removed from the vehicle if the heater core or evaporator core must be replaced.
1. Disconnect battery negative cable.
2. Drain cooling system. Service and Repair
3. If equipped with A/C, discharge refrigerant system.
CAUTION: When removing hoses from heater core inlet or outlet nipples, DO NOT use excessive force. Damage to heater core can result.
4. Disconnect heater hoses and plug heater core nipples to avoid spilling coolant in passenger compartment.
5. Disconnect coolant level indicator switch connector and remove coolant recovery bottle. Leave hose connected and position bottle out of the way.
6. Remove coolant recovery bottle mounting bracket.
7. Disconnect heater-A/C blower motor wire connector.
8. Disconnect vacuum supply hose.
9. Disconnect refrigerant lines from A/C unit at dash panel. Cover all open lines and coupling ends with tape to avoid excessive contamination to refrigerant system.
10. Remove the four heater-A/C unit attaching nuts securing unit to dash panel.
11. Remove steering column.
12. Remove instrument panel. Service and Repair
13. Remove floor air distribution duct.
14. Remove the two heater-A/C unit attaching nuts securing unit to plenum.
15. Remove heater-A/C unit from vehicle.
16. Remove vacuum connector from Air Conditioning Module (ACM).
17. Remove electrical connectors from ACM.
18. Remove mounting screws and ACM.
19. While unlocking retaining tab, remove motor arm from door pivot arm.
20. Remove spring and (clear) vacuum line from motor.
21. Lift up and pull hose out of its hole in the housing.
22. Disengage tabs and remove heater core.
23. Remove foam gaskets.
24. Pry off retaining clip and disconnect wires from the blower motor.
25. Remove blower motor mounting screws and remove blower motor.
26. Remove screws that hold upper and lower housing halves together.
27. Remove clips that hold upper and lower halves together.
28. Separate upper and lower housing halves.
29. Remove evaporator core.