If the slides work on 110, then the motors are ok. It has to be a 12-volt problem
Does every other 12-volt item work--fridge on 12? Is the 12-volt shutoff switch in the service door set to off? If the push/pull silver knob is in, the slides will not work, but the landing jacks will. Check on that.
I have an '05--the slide power is hydraulic on mine, so I am guessing you still have the push/pull knob in the area where the front jack controls are on the outside.
Hope this helps.
Joe
And, welcome to the forum.