Auxiliary Heater Core Replacement w/ Rubber Spacing Design

1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



3. Disconnect the auxiliary heater hoses from the auxiliary heater core pipes.
4. Lower the vehicle.
5. Remove the left rear quarter trim panel. Refer to Rear Quarter Lower Trim Panel Replacement in Interior Trim.



6. Remove the auxiliary heater pipe clamp screw.
7. Remove the auxiliary heater pipe clamp.
8. Disconnect the auxiliary inlet heater hose clamps.

Slide the hose clamps up onto the heater core pipe.

9. Loosen the auxiliary inlet heater hose at the heater core.

Slide the heater hose and pipe extension downward.

10. Disconnect the auxiliary outlet heater hose clamps.

Slide the hose clamps up onto the heater core pipe.

11. Loosen the auxiliary outlet heater hose at the heater core.

Slide the heater hose and pipe extension downward.




12. Remove the auxiliary heater core mounting screws.
13. Remove the auxiliary heater core from the HVAC module assembly.



14. Remove the heater core mounting bracket from the auxiliary heater core.

1. Install the heater core mounting bracket to the auxiliary heater core.



2. Install the auxiliary heater core to the HVAC module assembly.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the auxiliary heater core mounting screws.

Tighten
Tighten the screws to 1.6 N·m (14 lb in).




4. Install the hose clamps to the auxiliary heater core pipes.
5. Install the outlet heater hose to the auxiliary heater core.
6. Install the inlet heater hose to the auxiliary heater core.

Important: Align the inlet and outlet pipes to allow for the heater pipe clamp installation.

7. Install the auxiliary heater pipe clamp.
8. Install the auxiliary heater pipe clamp screw.

Tighten
Tighten the screw to 1.6 N·m (14 lb in).

9. Connect the auxiliary outlet heater hose clamps.
10. Connect the auxiliary inlet heater hose clamps.
11. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
12. Connect the auxiliary heater hoses to the heater core pipes.
13. Lower the vehicle.
14. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
15. Install the left rear quarter trim panel. Refer to Rear Quarter Lower Trim Panel Replacement in Interior Trim.

Auxiliary Heater Core Replacement w/ Solid Heater Core Pipe Design

1. Remove the auxiliary HVAC module. Refer to Auxiliary HVAC Module Replacement .



2. Remove the auxiliary heater pipe clamp screw.



3. Remove the auxiliary heater core mounting screws.
4. Remove the auxiliary heater core from the HVAC module assembly.



5. Remove the pipe seal from the auxiliary heater core.
6. Remove the heater core mounting bracket from the auxiliary heater core.

1. Install the heater core mounting bracket to the auxiliary heater core.
2. Install a new pipe seal onto the auxiliary heater core.



3. Install the auxiliary heater core into the HVAC module assembly.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the auxiliary heater core mounting screws.

Tighten
Tighten the screws to 1.6 N·m (14 lb in).




5. Install the auxiliary heater pipe clamp screw.

Tighten
Tighten the screw to 1.6 N·m (14 lb in).

6. Install the auxiliary HVAC module. Refer to Auxiliary HVAC Module Replacement .