GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Flushing

Tools Required

    • J 43600 Air Conditioning Service Center
    • J 45268 Flush Adapter Kit
    • J 41447 Leak Detection Dye
    • J 41459 Leak Detection Dye Injector
    • J 42220 Universal 12V Leak Detection Lamp

Important: Flushing is not intended to remove metal from the A/C system.

Flushing is intended to remove the following:

    • Contaminated PAG oil
    • Desiccant, following a desiccant bag failure
    • Overcharge of PAG oil
    • Refrigerant contamination

    Important: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
  3. Connect the A/C lines with the orifice tube removed.
  4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
  5. Install the J 45268-3 to the A/C compressor hose assembly.

    6. Object Number: 787687 Size: SH
  6. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.

    7. Perform the following procedure:

            Important: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

    6.1. Service the filter with ACDelco P/N GF 470, before each flush.

    Connect the J 45268-1 flush filter to the suction port of the J 45268-3 flush adapter.

    6.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
    6.3. Connect the red hose from the J 43600 to the J 45268-3.
  7. Reverse flow refrigerant flushing is recommended for desiccant bag failure only.

    8. Perform the following procedure and replace the accumulator when the flush is complete:

            Important: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

    7.1. Service the filter with ACDelco P/N GF 470, before each flush.

    Connect the J 45268-1 flush filter to the discharge port of the J 45268 --3 flush adapter.

    7.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
    7.3. Connect the red hose from the J 43600 to the suction port of the J 45268-3.
  8. Flush the A/C system. Follow the instructions supplied with the J 43600 .

    9. Close the valve on the external refrigerant tank, before starting the flush process.

  9. Remove the J 45268-3 from the A/C compressor hose assembly.
    10. • Remove the A/C compressor drain plug.
    • Drain the PAG oil from the A/C compressor.
    • Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
    • Install the A/C compressor drain plug.

    Tighten
    Tighten the drain plug to 20N·m (15 lb ft).

  10. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
  11. Inspect the orifice tube for debris.

    12. Clean or replace as needed.

  12. Install the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
  13. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

    14. Important: Flushing will remove all the PAG oil from the A/C system.

  14. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities .

    15. Important: Flushing will remove the fluorescent leak detection dye from the A/C system.

  15. Add one bottle of J 41447 using the J 41459 .
  16. Leak test the fittings using the J 42220 .