GM Service Manual Online
For 1990-2009 cars only

The automatic level control air compressor motor is a single piston type compressor powered by a 12 volt permanent magnet motor. The automatic level control air compressor head contains intake and exhaust ports plus a solenoid operated exhaust valve that releases air from the system when energized. Air is drawn into the automatic level control air compressor through the automatic level control air filter. The automatic level control air compressor motor attaches to the automatic level control air compressor-bracket using rubber grommets in order to reduce noise and vibration.