How do I change out the heater core

REMOVAL AND INSTALLATION

NOTE: The evaporator case (Heater-A/C housing) must be removed from the vehicle first. See: Evaporator Case Service and Repair

Remove heater A/C unit top cover.
Remove heater core to dash panel seal from the core tubes and remove the heater core from the unit.
To install, reverse the preceding operati

REMOVAL AND INSTALLATION

From inside the engine compartment, disconnect battery negative cable.
Discharge A/C refrigerant and disconnect lines at unit.
Drain radiator and disconnect heater hoses at unit Tape heater tubes to keep from leaking during removal.
Remove A/C condensate drain and disconnect vacuum lines.
Inside passenger compartment perform as follows:

Remove right upper and lower underpanel silencers.
Remove steering column cover.
Remove left underpanel silencer.

Position front seat or right front seat full rear.

Remove right cowl side trim.

Remove glove box.

Remove right instrument panel reinforcement.

Remove ash receiver.
Remove center distribution and defroster adapter ducts.
Disconnect relay module.
Disconnect blower motor wire connector.

12 Disconnect demister hoses from top of unit

For NonATC, disconnect the temperature control cable flag from the bottom of the heater- A/C unit and unclip the cable from the left side of the heat distribution duct Swing the cable out of the way to the left.
For NonATC, disconnect the vacuum lines at the unit.
For ATC, disconnect the instrument panel wiring from the rear face of the ATC unit.
Disconnect right 25way connector bracket and fuse block from panel.
From engine compartment, remove 4 unit attaching nuts.
Remove unit hanger strap lower screw, and rotate strap.
Move heater-A/C unit rearward to clear mounting studs and lower.
While pulling the lower right of instrument panel rearward:
Rotate unit while pulling from under instrument panel.

To install, reverse the preceding operation.