GM Service Manual Online
For 1990-2009 cars only

Handling Air Conditioning (A/C) Compressor for Chevrolet Chevy P52 RV/Van Chassis 1997

Do not strike, drop, or turn the compressor upside down. If the compressor is knocked over or turned upside down, rotate the compressor's magnetic clutch 5-6 times by hand to circulate the oil which has settled in the cylinder. Sudden rotating with oil in the cylinder can cause valve damage and adversely affect durability.