Draining Procedure
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the A/C compressor from the vehicle. Refer to Air Conditioning Compressor Replacement (LLY/LMM) , Air Conditioning Compressor Replacement (LU3) , Air Conditioning Compressor Replacement (LY2, LY5, LH6, L76, L92 and LMG) or Air Conditioning Compressor Replacement (HP2) .
- Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container.
- Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
- Inspect oil drained from the removed compressor. Refer to Air Conditioning Compressor Oil Diagnosis .
- Properly discard the used POE refrigerant oil.
NOTE:
Drain and measure as much of the refrigerant oil as possible from the removed compressor.
NOTE:
During the oil removal procedure, the condition of the oil should be evaluated. Compressor oil never breaks down unless something is wrong with the compressor or air conditioning (A/C) system. If one or more of the following conditions exist, replace the compressor and receiver dehydrator.