sticky steering on 1994 Buick LeSabre

have noticed my power steering has been stiff or sticky what may cause this

Asked by for the 1994 Buick LeSabre
Varying degrees of steering can likely be found in this set of charts. Good Luck with this one. iT seems like they all need a rack and pump just to get it right.
1 more answer
Steering rack bore scored, needs a new one with a flush. See front end shop for price!