LS V8-3.9L VIN A (2003)
Heater Core: Service and Repair
HEATER CORE AND EVAPORATOR CORE HOUSING, ASSEMBLY AND COMPONENTS
NOTE:
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Installation of a new receiver drier is not required when repairing the air conditioning system except when there is physical evidence of
contamination from a failed A/C compressor or damage to the receiver drier.
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New O-ring seals, lubricated in clean PAG oil, must be installed before reconnecting any A/C fitting that has been disconnected.
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If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested.
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If a heater core leak is suspected, the heater core must be leak tested before it is removed from the vehicle.
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Lubricate the coolant hoses with plain water only if needed.
REMOVAL
1. Recover the refrigerant.
2. Partially drain the cooling system.
3. Remove the instrument panel. For additional information, refer to: Dashboard/Instrument Panel. See: Body and Frame/Interior Moulding /
Trim/Dashboard / Instrument Panel/Service and Repair
4. To remove individual components, only carry out the listed steps.
