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General Motors

CAUTION: Flushing with ACR 2000 is not intended to remove metal from A/C system.
CAUTION: If vehicle is equipped with rear A/C, flush auxiliary A/C system separately.
NOTE: Tools Required:
  • ACR 2000 Air Conditioning Service Center (J-43600)
  • Flush Adapter Kit (J-45268)
  • Leak Detection Dye (J-41447)
  • Leak Detection Dye Injector (J-41459)
  • Universal 12 Volt Leak Detection Lamp (J-42220)
  1. Flushing is intended to remove contaminated PAG oil, desiccant (following a desiccant bag failure), overcharge of PAG oil and refrigerant contamination.
    2. NOTE: Warmer engine or ambient temperature decreases refrigerant recovery time during A/C flush procedure.
  2. Recover refrigerant. See GENERAL MOTORS  under REFRIGERANT RECOVERY/EVACUATION & RECHARGING.
  3. Remove orifice tube. See ORIFICE under REMOVAL & INSTALLATION in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
  4. Connect A/C lines with orifice tube removed.
  5. Remove A/C compressor. See COMPRESSOR under REMOVAL & INSTALLATION in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
  6. Install flush adapter to A/C compressor hose assembly.
    7. NOTE: Filter inside flush adapter is serviceable. Remove and discard check valve from filter.
  7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure:
    1. Service filter with AC Delco Part No. GF 470, before each flush. Connect flush filter to suction port of flush adapter.
    2. Connect Blue hose from ACR 2000 to flush filter adapter.
    3. Connect Red hose from ACR 2000 to flush adapter.
    8. NOTE: Filter inside flush adapter is serviceable. Remove and discard check valve from filter.
  8. Reverse flow refrigerant flushing is recommended for desiccant bag failure only. Perform the following procedure and replace accumulator when flush is complete:
    1. Service filter with AC Delco Part No. GF 470, before each flush. Connect flush filter to discharge port of flush adapter.
    2. Connect Blue hose from ACR 2000 to flush filter adapter.
    3. Connect Red hose from ACR 2000 to suction port of flush adapter.
  9. Flush A/C system. Follow instructions supplied with ACR 2000. Close valve on external refrigerant tank, before starting flush process.
  10. Remove flush adapter from A/C compressor hose assembly.
  11. Remove A/C compressor drain plug. See COMPRESSOR under REMOVAL & INSTALLATION in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
  12. Install A/C compressor drain plug.
  13. If replacing A/C compressor after flushing system, perform the following:
    1. Determine if NEW service compressor is shipped with PAG oil.
    2. If service compressor is shipped with PAG oil, DO NOT DRAIN NEW PAG oil from compressor.
    3. Deduct amount of PAG oil shipped with service compressor from specified amount of PAG oil. See SPECIFICATIONS in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article. Add calculated amount to compressor, as needed.
    4. If service compressor is shipped dry, no calculation is required. Add total system capacity of PAG oil to compressor. See SPECIFICATIONS in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
  14. Install A/C compressor. See COMPRESSOR under REMOVAL & INSTALLATION in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
  15. Inspect orifice tube for debris. Clean or replace as needed.
  16. Install orifice tube. See ORIFICE under REMOVAL & INSTALLATION in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
    17. NOTE: Flushing will remove all PAG oil from A/C system.
  17. Evacuate and recharge A/C system. See GENERAL MOTORS  under REFRIGERANT RECOVERY/EVACUATION & RECHARGING.
  18. Add total system capacity of PAG oil to A/C system. See SPECIFICATIONS in appropriate MANUAL A/C HEATER SYSTEMS or AUTOMATIC A/C HEATER SYSTEMS article.
    19. NOTE: Flushing will remove fluorescent leak detection dye from A/C system.
  19. Add one bottle of leak detection dye using leak detection dye injector.
  20. Leak test fittings using universal 12 volt leak detection lamp.
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