It is likely the gear box, you may need to lay under the coach and watch and listen, be careful.

I have seen in previous forms that many of the step assemblies use a Ford windshield wiper gearbox and motor available at a parts store. Good luck

In 2015 the steps on our 2008 Bounder quit working in the 'in' position. Found a replacement motor on the internet, less than $70, but don't remember where from. I did the labor myself, the most difficult part was getting the old motor out with the steps retracted. Once I got the motor out, I cleaned it up, oiled it, and it started working again. I went ahead an installed the new motor, and have kept the old motor as a back-up. It may not work again should I need it, but you never know.