Auxiliary Air Conditioning Evaporator Tube Replacement
Auxiliary Air Conditioning Evaporator Tube Replacement
Special Tools
J 39400-A Halogen Leak Detector
Removal Procedure
1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging (HP2) (Refrigerant Recovery and Recharging)Refrigerant Recovery and Recharging (Non-HP2) (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 (Service and Repair).
5. Remove the right assist step. Refer to Assist Step Replacement (GMC Denali XL) ()Assist Step Replacement (Chevrolet HP2) ()Assist Step Replacement (Power BRS) (Assist Step Replacement (Power BRS))Assist Step Replacement (Z71) (Assist Step Replacement (Off Road Package)).
6. Remove the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side (Service and Repair).
7. Remove the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement (RPO HP2) (Service and Repair)Rear Wheelhouse Panel Liner Replacement (RPO X88 Chevrolet, RPO O88 GMC) (Service and Repair).
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
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 (Service and 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).
Caution: Refer to Fastener Caution (Fastener Caution).
3. Install the heater/A/C tubes retaining nut (4) to the stud (1) at the frame (6) and tighten to 7 Nm(62 lb in).
4. Install the auxiliary A/C evaporator tubes (2, 3) and the retaining nut to the auxiliary HVAC module and tighten to 16 Nm(12 lb ft).
5. Lower the vehicle.
6. Install the rear wheelhouse liner. Refer to Rear Wheelhouse Panel Liner Replacement (RPO HP2) (Service and Repair)Rear Wheelhouse Panel Liner Replacement (RPO X88 Chevrolet, RPO O88 GMC) (Service and Repair).
7. Install the right assist step. Refer to Assist Step Replacement (GMC Denali XL) ()Assist Step Replacement (Chevrolet HP2) ()Assist Step Replacement (Power BRS) (Assist Step Replacement (Power BRS))Assist Step Replacement (Z71) (Assist Step Replacement (Off Road Package)).
8. Install the front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Right Side (Service and Repair).
9. Install the auxiliary A/C evaporator tubes (3) to the condenser tube (2) and the accumulator (5) using the nuts and tighten to 16 Nm(12 lb ft).
10. Recharge the refrigerant to the system. Refer to Refrigerant Recovery and Recharging (HP2) (Refrigerant Recovery and Recharging)Refrigerant Recovery and Recharging (Non-HP2) (Refrigerant Recovery and Recharging).
11. Leak test the fittings of the component using the J 39400-A .