GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon - 4WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning Evaporator Thermal Expansion Valve Screen Replacement

Tools Required

J 39400-A Halogen Leak Detector

Important: The A/C refrigerant filter installation procedure applies to vehicles with an auxiliary system only.

The A/C refrigerant filter must be installed to the A/C evaporator tube (liquid line) between the condenser and evaporator. The installation of this A/C refrigerant filter eliminates the need for flushing.

  1. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement for the 4.8L, 5.3L, 6.0L engine.

    2. Object Number: 719845 Size: SH
  2. Remove the evaporator tube (2) from the vehicle. Refer to Evaporator Tube Replacement .
  3. Measure 45 mm (1.75 in) from the bend on the condenser end of the evaporator tube (2) and mark the location.
  4. Measure 45 mm (1.75 in) from the mark on the evaporator tube (2) towards the evaporator from the previous step.

    5. Important: Do not allow metal burrs to enter the evaporator tube (2) during cutting or when removing the burrs.

  5. Using a tubing cutter, cut the marked section of the evaporator tube (2).
  6. Remove the burrs from the evaporator tube (2).

    7. Object Number: 718864 Size: SH
  7. Remove the nuts (4), the ferrules (3), and the O-rings (2) from the A/C refrigerant filter (1).

    8. Important: Do Not install the O-rings (2) in this step.

  8. Push the proper size nuts (4) and ferrules (3) over each of the evaporator tube halves.
  9. Install the ferrules (3) with the small end toward the nut (4).

    10. Object Number: 719845 Size: SH
  10. Install the A/C refrigerant filter (3) to the evaporator tube (2) with the flow arrow pointing towards the evaporator.

    11. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 718864 Size: SH
  11. While holding the evaporator tube in the A/C refrigerant filter (1), tighten the nuts (4) to the A/C refrigerant filter (1).

    12. Tighten
    Tighten the nuts to 34 N·m (25 lb ft).

  12. Remove the nuts (4) from the A/C refrigerant filter (1).
  13. Install the O-rings (2) to the evaporator tube halves. Refer to O-Ring Replacement .
  14. Install the nuts (4) to the A/C refrigerant filter (1).

    15. Tighten
    Tighten the nuts to 34 N·m (25 lb ft).


    Object Number: 719845 Size: SH
  15. Install the evaporator tube (2) to the vehicle. Refer to Evaporator Tube Replacement .
  16. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .
  17. Leak test the fittings of the component using the J 39400-A .
  18. Install the air cleaner. Refer to Air Cleaner Assembly Replacement for the 4.8L, 5.3L, 6.0L engine.