Auxiliary Air Conditioning Evaporator Tube Replacement (Suburban XL)

AUXILIARY AIR CONDITIONING EVAPORATOR TUBE REPLACEMENT (SUBURBAN XL)

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging. 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 Vehicle Lifting.
5. Remove the right assist step.
6. Remove the front wheelhouse liner.
7. Remove the rear wheelhouse liner.




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.

INSTALLATION PROCEDURE

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).

3. NOTE: Refer to Fastener Notice.

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

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

5. Lower the vehicle.
6. Install the rear wheelhouse liner.
7. Install the right assist step.
8. Install the front wheelhouse liner.




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

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

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