That switch on my 3075RL also controls the outlets in the living room slide and the outlet at the rear of the coach. (And at one time, my refrigerator
until they corrected that). I don't think mine is on a GFCI circuit, but it could be since we don't have wiring diagrams to tell us otherwise. You may have to open up the switch and check it with a meter. Then try to trace the wires back to the box if no power to the switch. Also check all the wires in the breaker/fuse box to make sure they are all tight. Loose wires seems to be an all too common problem.
Or if your dealer is near by, take it back to them. They should do that kind of make-good service quickly for you since you just bought it.