General information about the electronic level control system (Chevrolet Lumina 1)

Some vehicles are equipped with an electronic level control system that adjusts the height of the vehicle as the vehicle load changes. The system consists of an air compressor (see illustration), moisture separator, exhaust solenoid valve, compressor relay, altitude sensor (see illustration), shock absorbers with adjustable air pressure height (see illustration 9.3) and pipelines between the various parts of this system.

When the ignition is turned on and the weight of the vehicle changes, the compressor is automatically turned on; when the ignition is turned off or the weight is changed, the solenoid valve, which is connected to the positive terminal of the battery, is activated, releasing the pressure in the system. A solenoid located in the compressor assembly acts as a pressure relief valve, limiting the maximum pressure to approximately 180 psi.

14.1a. Compressor (the plastic casing has been removed): 1 - compressor head, 2 - compressor moisture separator, 3 - compressor electric motor

14.1b. Height sensor: 1 - height sensor, 2 - sensor lever, 3 - sensor rod

(The article is reprinted from the website «chevyman»)