Do anyone have any instruction on how to replace.

REMOVAL

Remove the evaporator core housing. For additional information, refer to Evaporator Core Housing.

NOTE: If a leak is suspected, the heater core must be leak tested in the vehicle before removal.

Remove the evaporator core housing to air inlet housing screws.

Disengage the clip and separate the evaporator core housing from the air inlet housing.

Remove the gasket.

Remove the nine screws, disengage the clip and separate the evaporator core housing from the air inlet housing.
Disconnect the bypass door connector and position the harness aside.

Remove the screws.

Remove the heater core.
Remove the heater core tube gasket.

INSTALLATION

To install, reverse the removal procedure.