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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1443 (HVAC SYSTEMS - GENERAL SERVICING)REPAIR INSTRUCTIONSCOMPRESSOR OIL BALANCINGBALANCING PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Balancing Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Balancing Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The refrigerant oil in the A/C system must be balanced during compressor replacement.
  1. The replacement compressor is shipped with 240 ml (8.0 oz) of refrigerant oil.
    2. Fig 1: Draining A/C Refrigerant Oil From Compressor
    GM821777Courtesy of GENERAL MOTORS CORP.
  2. Before installing the compressor, the refrigerant oil will have to be partially drained:
    1. Refer to the amount of refrigerant oil recorded during the compressor removal.
    2. Subtract the amount recorded from the total system capacity. Refer to Refrigerant System Capacities .

      The difference between the total system capacity and the recorded amount is the calculated amount to be drained from the replacement compressor.

  3. Drain the calculated amount of refrigerant oil from the replacement compressor.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.