Heater - A/C Housing Removal and Installation
REMOVAL
WARNING: IF EQUIPPED WITH AIR CONDITIONING, THE REFRIGERATION SYSTEM MUST BE COMPLETELY EMPTY BEFORE PROCEEDING.
1. Set parking brake.
2. Disconnect battery negative cable.
A/C Service Ports:

3. Using a refrigerant recovery machine, remove refrigerant from the A/C system. Refer to: "Testing and Inspection" Testing and Inspection
4. Remove Wiper module. Refer to: "Wiper and Washer Systems : Wiper Control Module : Service and Repair" Service and Repair
5. Pinch off rear heater lines if equipped.
Heater Hoses:

6. Drain engine coolant. Remove heater hoses at the heater core. Plug coolant lines. Refer to: "Engine, Cooling and Exhaust : Cooling System : Service and Repair" Service and Repair
Expansion Valve Plate:

7. Remove suction and liquid lines at the expansion valve.
8. Remove the Instrument Panel Assembly. Refer to: "Body and Frame : Interior Trim : Dashboard / Instrument Panel : Service and Repair".Service and Repair
9. Remove heater ducts.
10. Disconnect the two upper mounts from the upper reinforcement and the lower mount from the tunnel.
HVAC Bolt Up:

11. Remove the (3) nuts (in the engine compartment) securing the unit to the dash panel.
12 Disconnect the HVAC housing wiring harness.
13 Pull the entire unit rearward until the studs on the unit clear the dash panel. Drop the unit down. Pull it rearward to remove it from vehicle.
INSTALLATION
1. For installation of the assembly, reverse the above procedures. Install new O-rings on plumbing inlets
2. Evacuate and recharge the A/C system.
3. Perform HVAC control Calibration Diagnostic and Cool-down test. Refer to: "Testing and Inspection" Testing and Inspection