Just noticed over the weekend that when trying to pull out of a parking spot where alot of little rice burners boxed me in...that I could barely turn the steering wheel when the truck was not moving...but once started to roll, became much easier.
Seems like I should be able to turn the wheel at least with a little force applied.

I'm afraid that's normal. 2 things that make it worse are (1) oversized tires like you have, and (2) using the brakes at the same time.

I have stock size tires (265's) and trying to turn too when barely moving, especially with the brakes on, is often met with a sudden stop of turning the steering wheel. I don't know of anything that can be done except to gently try again, let up on the brakes if you can, be moving slightly (it's better for the tires anyway).

A steering stabilizer may help you some.

Could be a couple of things, tire size as mentioned, power steering pump worne out, power steering fluid needs changing, or your hydro-booster could be on its way out.

I'm affraid to ask how much a hydro-booster runs?
Well, my puncuation says it all...

I have been looking into this and about to pull the
trigger.........http://www.pscmotorsports.com/images/large/Pumps/SP-1304-sm_LRG.jpg




http://www.pscmotorsports.com/sp1404-high-performance-hydroboost-p-pump-p-736.html



Mainly out of annoyance not need....:rolleyes: