With A/C

1. Disconnect battery ground cable, then drain cooling system.
2. Disconnect inlet and outlet hoses from heater.
3. Proceed as follows:
a. Remove auxiliary housing lower cover attaching screws, then the heater core tube seal and cover plate.
b. Remove heater core support bracket attaching screws, then the support bracket.
c. Remove heater core from housing.
4. Reverse procedure to install.