Marie Hoysa Friers

Just bought a used 2005 uplander. Went for an oil change and was told the alc is unplugged underneath. I guess it adjusts the height of the rear suspension when driving. I am not sure how it is unplugged, but I am wondering if it is simple, just plug it back in? I do hear the compressor run for 5 seconds when I start the car. And the air compressor in the back to inflate things works fine. Apologies if I'm using the wrong terminology,

Any help would be appreciated. I would assume I would disconnect the battery before reconnecting.