My factory instructions are: extend slides at ride height ( bags inflated), dump air, level. To leave: air up bags, raise levelers, retract slides.
It seems odd because I have to turn the ignition off for the slides to move and I have to listen to the low air alarm while leveling but that is what the manual says.
2004 Beaver Monterey Laguna IV
Cummins ISC 350HP Allison 3000 6 speed
2020 Chevy Equinox Premier 2.0t 9 speed AWD