Thanks for the reply, Steve. I was unable to get the step to extend, since I was unaware of the underlying architecture. I knocked out an access plate (shown in pictures). Then, I was able to get tools and flashlight under the stuck step to see what to do. The step uses two scissor jacks to raise it and the left one was not engaging. I removed two crush nuts and a bolt, which freed the step from the stuck jack. Then, I was able to guide it up using the good side's power.
The problem was a cable had sheared off on one side. I called Atwood, since they were the manufacturer of the motor, but they had sold all of their RV line to Lippert. Called Lippert, and they could not sell me parts, since they had discontinued all the Atwood step products. I went to google, and found this site for power sofa recliner parts - CPC PARTS: Conversion Parts Center; Conversion Parts for Glaval, Mark III, Coachmen and more..... Conversion Parts Center. PARTS LOCATORS. LET US DO THE LEG WORK FOR YOU.
. This part was a dead ringer for it -> W-424237 at $27.50 each. I reached out to them, but received no response. I called Total Value RV and was quoted a price of $110 each. Once I finally got in contact with CPC Parts, I ordered 2 of them and installed them. Dry lubed up and complete.
I took pictures of the broken underside for examples for anyone else who has the same motor and jacks under the step.