Envoy 2WD V8-5.3L VIN P (2004)
Housing Assembly HVAC: Service and Repair
HVAC Module Assembly Replacement
HVAC MODULE ASSEMBLY REPLACEMENT
TOOLS REQUIRED
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J 43181 Heater Line Quick Connect Release Tool
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J 39400-A Halogen Leak Detector
REMOVAL PROCEDURE
1. Drain the engine coolant. Refer to Draining and Filling Cooling System (Body Vin Code 6) Draining and Filling Cooling System (Body Vin Code
3) in Cooling System.
2. Recover the refrigerant.
3. Remove the I/P carrier. See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair/Instrument Panel (I/P)
Carrier Replacement
4. Reposition the heater hose clamps using J 43181.
5. Disconnect the heater hoses from the heater core.
6. Remove the retaining nut (3) from the accumulator (6) at the evaporator (1).
7. Disconnect the accumulator (6) from the evaporator (1).
8. Disconnect the evaporator tube (4) from the evaporator (1).
9. Disconnect all of the electrical connectors to the HVAC module assembly.
10. Remove the HVAC module assembly.
INSTALLATION PROCEDURE
1. If replacing the HVAC module assembly (8), transfer the components from the old HVAC module assembly as necessary.
2. Install the HVAC module assembly (8).
3. Connect all of the electrical connectors to the HVAC module assembly.