Let me try again. I see that GS uses Power Gear & Liftco for slides & slide accesories. I couldn't find any reference to gen slides in GS's literature, but lo & behold, Power Gear list a 12 volt motor/pump & manuals at:
The actual manual is:
Hopefully this last link downloads & opens it for you. If not, at the top link, drill thru manual > slideout > power gear > Gen-Slide hydraulic slide out. They also have other Gulf Stream application manuals listed.
If this leads nowhere, we'll go in & see what can be found about Liftco.
I forgot to ask, is your gen slide only electric, or electric driving a hydraulic pump? Don't forget, there has to be a switch of some sort in around the mechanism. Maybe proximity switches if you can't find a mechanical switch? My coach levelers use proximity switches. Once you identify the exact model you have, the manufacturer will be able to guide you to fixing it.