Auxiliary HVAC Module Removal and Installation

Auxiliary HVAC Module Removal and Installation

Removal Procedure

1. Recover the refrigerant from the air conditioning (A/C) system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

2. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Vac N Fill) Cooling System Draining and Filling (Vac N Fill).

3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

4. Remove the right rear wheelhouse liner panel. Refer to Rear Wheelhouse Panel Liner Replacement (Traverse) Rear Wheelhouse Panel Liner Replacement (Enclave) Rear Wheelhouse Panel Liner Replacement (Acadia) .




5. Disconnect the heater tubes (2, 3) from the auxiliary heater and air conditioning evaporator and blower module (HVAC) at the underside of the vehicle.

6. Remove the auxiliary air conditioning evaporator tube nut (6) from the auxiliary HVAC module stud (1).

7. Disconnect the auxiliary air conditioning evaporator tube (4, 5) from the auxiliary HVAC module at the underside of the vehicle.

8. Remove the nuts from the studs that secure the auxiliary HVAC module to the underside of the vehicle.

9. Lower the vehicle.

10. Remove the right rear quarter trim panel. Refer to Quarter Lower Rear Trim Panel Replacement (Traverse with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Traverse with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4)Quarter Lower Rear Trim Panel Replacement (Enclave with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Enclave with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4)Quarter Lower Rear Trim Panel Replacement (Acadia with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Acadia with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4).

11. Disconnect the electrical connectors from the auxiliary HVAC module.




12. Remove the upper auxiliary air conditioning air outlet duct (2). Refer to Auxiliary Air Conditioning Air Outlet Duct Replacement Auxiliary Air Conditioning Air Outlet Duct Replacement.




13. Remove the lower auxiliary heater air outlet duct (2). Refer to Auxiliary Heater Air Outlet Duct Replacement Auxiliary Heater Air Outlet Duct Replacement.




14. Remove the fasteners (3) retaining the auxiliary HVAC module to the vehicle.

15. Remove the auxiliary HVAC module (4) from the vehicle.

Installation Procedure




1. Install the auxiliary HVAC module assembly (4) to the vehicle.

Caution: Refer to Fastener Caution Fastener Caution.

2. Install the 2 bolts (3) inside the vehicle in order to retain the auxiliary HVAC module to the vehicle, and tighten to 10 Nm (89 lb in).




3. Install the upper auxiliary air conditioning air outlet duct (2). Refer to Auxiliary Air Conditioning Air Outlet Duct Replacement Auxiliary Air Conditioning Air Outlet Duct Replacement.




4. Install the lower auxiliary heater air outlet duct (2). Refer to Auxiliary Heater Air Outlet Duct Replacement Auxiliary Heater Air Outlet Duct Replacement.

5. Connect the electrical connectors to the auxiliary HVAC module.

6. Install the right rear quarter trim panel. Refer to Quarter Lower Rear Trim Panel Replacement (Traverse with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Traverse with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4)Quarter Lower Rear Trim Panel Replacement (Enclave with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Enclave with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4)Quarter Lower Rear Trim Panel Replacement (Acadia with TB5) Quarter Lower Rear Trim Panel Replacement (With TB5)Quarter Lower Rear Trim Panel Replacement (Acadia with TB4) Quarter Lower Rear Trim Panel Replacement (With TB4).




7. Raise the vehicle.

8. Install the 2 nuts that secure the auxiliary HVAC module to the vehicle, and tighten to 9 Nm (80 lb in).

9. Install the auxiliary air conditioning evaporator tube (4, 5). and the nut (6) to the auxiliary HVAC module stud (1), and tighten to 22 Nm (16 lb ft).

10. Install the auxiliary air conditioning evaporator tube nut (6) to the auxiliary HVAC module stud (1), and tighten to 22 Nm (16 lb ft).

11. Install the heater tube (2, 3) to the auxiliary HVAC module at the underside of vehicle.

12. Install the right rear wheelhouse liner panel. Refer to Rear Wheelhouse Panel Liner Replacement (Traverse) Rear Wheelhouse Panel Liner Replacement (Enclave) Rear Wheelhouse Panel Liner Replacement (Acadia) .

13. Lower the vehicle.

14. Fill the engine cooling system. Refer to Cooling System Draining and Filling (Static Fill) Cooling System Draining and Filling (Static Fill)Cooling System Draining and Filling (Vac N Fill) Cooling System Draining and Filling (Vac N Fill).

15. Recharge the air conditioning system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

16. Inspect for air conditioning system for refrigerant leaks. Refer to Leak Testing Leak Testing.