GM Service Manual Online
For 1990-2009 cars only

The air conditioning compressor is a belt-driven six cylinder swash plate type. There are three double end positions that form six pumping chambers.

Refrigerant-134a flow is controlled by a reed valve and internal passages.

Front and rear cylinder heads hold the valve and plates to the main body and are secured by six bolts.

Compressor oil mixed with refrigerant lubricates the A/C compressor. Compressor cycling is determined by an electrically actuated armature and other controls.