Look in the wiring harness just under the hydraulic pump. There should be an In-Line fuse that provides power to the Level-up control panel that may have blown.
There is a re-wiring of that line because as originally supplied there is a random blowing of that fuse. We went through a few fuses until we moved that line over to main distribution buss on the back wall of the battery compartment.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top