1. Drain the cooling system. Refer to Cooling System Draining and Filling.
2. Squeeze the plastic retainer tabs on the inlet hose.



3. Pull the connection apart.



4. Squeeze the plastic retainer tabs on the outlet hose.



5. Pull the connection apart.



6. Remove the auxiliary heater pipes (1, 2) from the heater inlet and outlet tees (3, 4) at the HVAC module.
7. Remove the vehicle right assist step. Refer to Assist Step Replacement.

Remove both of the right tires. Refer to Tire and Wheel Removal and Installation.

8. Remove the right rear wheelhouse panel. Refer to Rear Wheelhouse Panel Liner Replacement.
9. Remove the right front wheelhouse panel. Refer to Front Wheelhouse Liner Replacement - Right Side.



10. Remove the auxiliary heater pipes (2, 3) from the auxiliary heater core.



11. Remove the heater/A/C tubes retaining nut (4) from the stud (1) at the frame (6).
12. Remove the auxiliary heater pipes (2) from the clamps (5).
13. Remove the auxiliary heater pipes from the vehicle.

Note: The replacement A/C and heater pipes are shipped in two sections and spliced together upon installation. Refer to Auxiliary Heater and Air Conditioning Pipe Repair.

1. Install the auxiliary heater pipes to the vehicle.



2. Install the auxiliary heater pipes (2) to the clamps (5).

Caution: Refer to Fastener Caution in the Preface section.

3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6) and tighten to 7 N·m (62 lb in).



4. Install the auxiliary heater pipes (2, 3) to the auxiliary heater core.
5. Install the right front wheelhouse panel. Refer to Front Wheelhouse Liner Replacement - Right Side.
6. Install the right rear wheelhouse panel. Refer to Rear Wheelhouse Panel Liner Replacement.
7. Install the vehicle right assist step. Refer to Assist Step Replacement.



8. Install the auxiliary heater pipes (1, 2) to the heater inlet and outlet tees (3, 4).



9. Connect the outlet heater hose to the heater core.
10. Connect the inlet heater hose to the heater core.
11. Fill the cooling system. Refer to Cooling System Draining and Filling.