Buick Suspension Front Springs Air Suspension System

Is this perhaps connected to the auxilliary air compressor?

pounding, banging noise from rear suspension when hitting frost cracks in the roads. air shocks have been replaced with reg. monroe matics, still same noise.  Wverything seems to be tight in the suspension

lately having a rumbling noise coming from the struts or suspension area while idling. I recently installed new shocks. is there a related problem?