Balancing Procedure with Service Compressor Replacement (Flushing Not Required)

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.

NOTE: The refrigerant oil in the A/C system must be balanced during compressor replacement.
The replacement compressor is shipped with 74 ml (2.5 oz.) of refrigerant oil.

Fig 1: Illustrating Refrigeration Oil Replenishing

Courtesy of GENERAL MOTORS CORP.

Before installing the compressor, calculate the total amount of oil drained from the compressor and collected by the recovery equipment.
If the amount drained and recorded is:
- LESS THAN 74 ml (2.5 ounces), leave 74 ml (2.5 ounces) in the replacement compressor. Do not drain the oil from the replacement compressor.
- MORE THAN 74 ml (2.5 ounces), calculate the difference between the amount that was drained and recorded. ADD the calculated difference to the A/C system by filling the A/C compressor or using J 45037: injector along with GE 48997: adapter.