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My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
Usually this type of fault here is caused by a fault with one or more of the air matic shocks/struts themseves.It can be that one is leaking slowly or slightly causing the pump to run to try and level out the vehicle.If the vehicle dips or lowers at all at any point when sitting and takes a bit to raise back up usually this is the cause with these needing inspected for leaks and the affected component leaking replaced.
The other issue is a faulty reading level sensor to where a level sensor is sending a false vehicle level signal to the air matic ecu and the ecu is trying to get the pump to correct the level even though the level of the vehicle is o.k.
The first thing that needs done here is to have the fault codes checked/read out to see what codes are set.Then once this is done any codes set in the air matic system will need diagnosed to help locate and repair this fault here.
I suspect a strut/shock issue or a level sensor issue here needing replaced.
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