Tools Required

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

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 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

Fig 1: Filter Cap
Courtesy of GENERAL MOTORS CORP.

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

Recover the refrigerant. Refer to REFRIGERANT RECOVERY AND RECHARGING .
Remove the orifice tube. Refer to EXPANSION (ORIFICE) TUBE REPLACEMENT .
Connect the A/C lines with the orifice tube removed.
Remove the A/C compressor. Refer to COMPRESSOR REPLACEMENT (2.2L) or COMPRESSOR REPLACEMENT (4.3L) .
Install the J 45268-3 to the A/C compressor hose assembly.
Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.
Perform the following procedure:

Important: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.
1. 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.
2. 6.2 Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
3. 6.3 Connect the red hose from the J 43600 to the J 45268-3.
Reverse flow refrigerant flushing is recommended for desiccant bag failure only.
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.
1. 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.
2. 7.2 Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
3. 7.3 Connect the red hose from the J 43600 to the suction port of the J 45268-3.
Flush the A/C system. Follow the instructions supplied with the J 43600 .
Close the valve on the external refrigerant tank, before starting the flush process.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Remove the J 45268-3 from the A/C compressor hose assembly.
- 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 20 N.m (15 Ib. ft).
If replacing the A/C compressor after flushing the system, perform the following:
- Determine if the new service compressor is shipped with PAG oil. Refer to REFRIGERANT SYSTEM CAPACITIES .
- If the service compressor is shipped with PAG oil, DO NOT drain the new PAG oil from the compressor.
- Deduct the amount of PAG oil shipped with the service compressor from the amount of PAG oil listed in the capacities table. Refer to REFRIGERANT SYSTEM CAPACITIES . Add the calculated amount to the compressor, as needed.
- If the service compressor is shipped dry, no calculation is required. Add the total system capacity of PAG oil to the compressor. Refer to REFRIGERANT SYSTEM CAPACITIES .
Install the A/C compressor. Refer to COMPRESSOR REPLACEMENT (2.2L) or COMPRESSOR REPLACEMENT (4.3L) .
Inspect the orifice tube for debris. Clean or replace as needed.
Install the orifice tube. Refer to EXPANSION (ORIFICE) TUBE REPLACEMENT .
Evacuate and recharge the A/C system. Refer to REFRIGERANT RECOVERY AND RECHARGING .
Important: Flushing will remove all the PAG oil from the A/C system.
Add the total system capacity of PAG oil to the A/C system. Refer to REFRIGERANT SYSTEM CAPACITIES .
Important: Flushing will remove the fluorescent leak detection dye from the A/C system.
Add one bottle of J 41447 using the J 41459 .
Leak test the fittings using the J 42220 .