Does Cat fuel priming pump fit on a Winnebago Journey?

I'm sure Cat will let you bring it back if it will not fit although I THINK it will. Since you are in CO I'd park it on a steep hill with a full fuel tank... nose up. I'd prefill the filter and just change it quickly. If you needed to change it in SE Fla it would be hard to find a hill that gets the fuel in the tank as high as the filter. Another option is to put a valve in the fuel line at the engine so the fuel cannot suck air into the line. You still have to prefill the filter with clean fuel.