1.Disconnect battery ground cable, then drain engine coolant.
2.Disconnect heater hoses from heater unit and remove grommet.
3.Remove instrument panel, refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel/Service and Repair.
4.Remove heater unit attaching nuts and bolts, then the heater unit, Fig. 1.
5.Remove heater core from heater unit.
6.Reverse procedure to install.