Not specific to the 33 but here is a short checklist.
. Any delamination on the exterior walls and interior (check all cabinets)
. Exhaust manifold leaks
. Proper brake function (verify you have power brakes and power steering)
. Leveling system operational
. All appliances functional (check with more then one high volume LP appliance simultaneously)
(water heater, stove, refrigerator on LP and AC, furnaces, microwave or oven)
. Fresh water pump function and leaks (pressurize system and verify no pump restart after 20 minutes)
. Engine starts with no oil smoke and idles smooth. Road test.
. Verify Dash heat and AC
. Generator starts and produces power (switch over has a 30 second delay)
. Run both roof top AC till cold on generator (takes a few minutes for compressors to turn on so be patient)
. Check condition and age of tires.
. Open all awnings (check fabric and pull cords)
. Check air pressure to air bags using dash gauge (takes a few minutes to pump up from 0 and should settle in around 50 to 70psi. Will not inflate if leveling system has weight off TAG axle)
. Check air horn operation
. Verify keyless entry system (Enter code to open side door then press 5/6 within a few seconds to unlock lower compartments. Press both the 7/8 and 9/0 keys to lock everything)