General Motors W/6 Cylinder Compressor: Notes

The standard A/C system with the 6 cylinder compressor is fully charged with 10.5 ounces of refrigerant oil while models equipped with optional overhead A/C system are fully charged with 13 ounces of refrigerant oil. Adding additional oil is not normally required unless a definite oil loss has occurred due to a ruptured line, leaking compressor seal, replacement of system component, compressor overhaul, or loss due to collision.