Engine running to have power steering don't work?
You're replacing the wheel bearing? Idk if they're the old school spindle type or unit bearing??
If you're repacing the unit bearing, use sledge hammer on back of unit bearing's flange. Keep the nut on so it will not separates when pounding on it. This always worked for me. Although the ones I did was not 3/4-up ton trucks but they was rusted in solid. My 12v's unit bearing actually just 'fall out' when I took them off.
I think Mark is referring to a slide hammer that attaches to the wheel lugs, you use lug nuts to secure the slide hammer on.