If the steps are making a ratcheting sound it probably is the motor assembly. First you have to see what series your step are. Look underneath for a sticker or the series. ie. 40 series, 39 series. Also on the motor there may be a sticker with a part number. Kwikee has been bought by Lippert. Motor is not hard to replace on your own there are videos on youtube. Lippert is helpful to tell you where to find numbers or help diagnose call them at Lippert Customer Service
Email:
customerservice@lci1.com
Phone: 574-537-8900
You can buy the motors on Amazon - and many other online places when you know the series steps you have.
I have replaced my motor twice now. Seems like once a year project.