Not actually air suspension. These cars have coil springs at all 4 corners, oil filled struts up front, and oil filled shocks in back. The shocks have air bladders for ride height control only.
The problem is most likely a bad ELC pump exhaust solenoid. You'll have to pull your codes. There's a "sticky" thread on how to pull DTCs at the top of the FWD Deville/Fleetwood page. Make sure to include the code definitions.
The problem is most likely a bad ELC pump exhaust solenoid. You'll have to pull your codes. There's a "sticky" thread on how to pull DTCs at the top of the FWD Deville/Fleetwood page. Make sure to include the code definitions.