I think Oriontn is asking about replacing the carpet with vinyl flooring, not more carpeting. In that case, the only question is what does the slideout use for support as it comes in and out?
If you vacuum the carpet smooth while the slide is out, then run the slide in and out, does it leave marks in the carpet? If it does, it uses skids (probably Teflon blocks) to let it slide safely on the carpet and they may scratch a vinyl floor.
If it doesn't leave marks on the carpet, it's supported by rollers at the floor's edge and you should be able to safely replace the carpet with vinyl flooring.