Auxiliary Air Conditioning Evaporator Tube Replacement Suburban XL

Tools Required

J 39400-A Halogen Leak Detector

1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .



2. Remove the auxiliary A/C evaporator tubes (3) from the condenser tube (2) and the accumulator (5).
3. Loosen the right front wheelhouse to gain access to the clamp behind the wheelhouse.
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Remove the right assist step. Refer to Assist Step Replacement .
6. Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side .
7. Remove the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement .



8. Remove the retaining nut (2) and the auxiliary A/C evaporator tubes (3) from the auxiliary HVAC module.



9. Remove the heater/A/C tubes retaining nut (4) from the stud (1) at the frame (6).
10. Remove the auxiliary A/C evaporator tubes (3) from the clamps (5).
11. Remove the auxiliary A/C evaporator tubes from the vehicle.

Important: 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 A/C evaporator tubes to the vehicle.



2. Install the auxiliary A/C evaporator tubes (3) to the clamps (5).

Notice: Refer to Fastener Notice in the Preface section.

3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6).

Tighten
Tighten the nut to 7 N·m (62 lb in).




4. Install the auxiliary A/C evaporator tubes (2, 3) and the retaining nut to the auxiliary HVAC module.

Tighten
Tighten the nut to 16 N·m (12 lb ft).

5. Lower the vehicle.
6. Install the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement .
7. Install the right assist step. Refer to Assist Step Replacement .
8. Install the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side .



9. Install the auxiliary A/C evaporator tubes (3) to the condenser tube (2) and the accumulator (5).

Tighten
Tighten the nuts to 16 N·m (12 lb ft).

10. Recharge the refrigerant to the system. Refer to Refrigerant Recovery and Recharging .
11. Leak test the fittings of the component using the J 39400-A .