the a/s owners manual is pretty good on the essential M issues...
supplemented by the specific manuals for EACH major appliance (furnace, fridge, ac, water heater)
tires, brakes, running gear, hitch, safe chains/breakaway, all exterior bulbs and so on...
again the owners manual is pretty good.
and issues vary from era2era and by model.
it the simplest terms, OPEN everything that can be opened and clean, inspect.
seal everything that's supposed to be sealed.
top off everything that has an essential fluid (batteries/brakes/tires)
UNclog anything that's supposed to be open (vents, drains)
lube anything that has grease inside (hubs, stab jacks, tongue jack)
deal with rust or cosmetic issues on the exterior AND inside.
tighten screws, silicone the window gaskets, drawers, doors and so on.
basically all of the appliances need to be inspected, things like gas/carbon at the fridge/heater/water heater and stove...
then inspected/clean out the dust bunnies from the breaker box/fuses and so on...
then look at all of the obvious plumbing for TINY water leaks, or signs of leaking...
then check all the sealants and window seams and so on...
including roof top.
then thing about rotating the tires (front/back) same side
air conditioning is important, so it's useful to pull OFF the main cover (4-6 screws) and inspect/clean the coils, looking for wasp nests or crud...
the owners manual does talk about inspecting the drum brakes and servicing the bearings
((the warranty is actually VOIDED if the bearings are NOT serviced in the first year))
the main owners manual has a pretty good list of 'maintenance stuff'
still if you search the M word, many dozens of threads will appear...
on things like the brakes, batteries, tires and more globallllly, da'stream.
here are just 2...