On my 2009 Dynasty has the same window regulator looking mechanism for the step cover.
I believe there are 4 or 6 bolts that you can access from underneath that hold the whole thing in place, on the top are welded in nutserts.
I have never had mine out but looks like that is how it is held in and not sure you have room to get it out please keep us updated.
Mine seems to come out against the door before raising and then leaves a gap at the floor and step cover, I would like to see some more picture to see if I am missing some kind of stop or something or if this is just how Monaco built them.
The picture circled in red is the nutsert on the top plate.
On my 2009 Dynasty with the CCM the air solenoid and pressure regulator are on the right side (passenger side) of the generator a blue supply hose and a yellow hose exiting the pressure regulator. Mine will work without the ignition being turned on and I can hear the solenoid clicking by pushing the horn button when there isn't any air in the system.
