GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Rendezvous - AWD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Flushing

Tools Required

    • J 43600 ACR 2000 Air Conditioning Service Center
    • J 45268 A/C Flushing Adapter Kit
    • J 41447 R-134A A/C Tracer Dye - Box of 24
    • J 42220 Universal 12V Leak Detection Lamp

Important: Flushing with the ACR 2000 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 TXV. Refer to Thermal Expansion Valve Replacement .
  3. Install the J 45268-103.
  4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
  5. Install the J 45268-5 to the discharge hose.
  6. Install the J 45268-4 to the suction hose.

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

    8. Perform the following procedure:

            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 suction port of the J 45268-4 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 J 45268-5 flush adapter.
  8. Reverse flow refrigerant flush is recommended for desiccant bag failure.

    9. Replace the receiver dehydrator when the A/C flush is complete and perform the following procedure:

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

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

    Connect J 45268-1 flush filter to the discharge port of the J 45268-5 flush adapter.

    8.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
    8.3. Connect the red hose from the J 43600 to the suction port of the J 45268-4 flush adapter.
  9. Flush the A/C system. Follow the instructions supplied with the J 43600 .

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

  10. Remove the J 45268-4 from the suction hose.
  11. Remove the J 45268-5 from the discharge hose.
  12. Remove the J 45268-1 from the J 43600 .
  13. Drain the PAG oil from the A/C compressor, through the suction and discharge ports.

    14. Rotate the compressor input shaft to assist in draining the PAG oil from the A/C compressor.

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

  14. Add one bottle of J 41447 directly to the A/C compressor.
  15. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
  16. Remove the J 45268-103.

    17. Install new seal washers.

  17. Inspect the TXV for debris.

    18. Clean or replace as needed.

  18. Install the TXV. Refer to Thermal Expansion Valve Replacement .
  19. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

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

  20. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities .
  21. Leak test the fittings using the J 42220 .