need help
 

steering wheel will not turn while sitting still.belt and fluid are ok.thanks in advance.

Re: need help
 

Did you check to see if the power steering pump pulley was actually turning when the truck was parked and idling? A very loose belt might cause you to loose power steering at low speed. A very bad pump might do the same thing. You should still be able to muscle the steering wheel even if the power steering pump was not functioning.

Re: need help
 

You may have sheared the torsion shaft inside the pump. Use a pry bar or a screw driver and see if you can pry the pulley away from the pump housing. If it moves outward you need a new pump. You can compare the effort needed with engine running and the engine not. Not an uncommon problem. Good luck, Ron