You NEED to replace the rack and pinion steering unit.
It does not matter on that year, just make sure that it is POWER STEERING FLUID.
Their isn't one
it should be a black cylender cup thing that says power steering fluid
how do you change power steering pump for chevy express van 1998 v6
How do you remove power steering pulley on a 1990 ck truck
yes, Chevy truck brackets are the same from 1988-1995
Chevy said to us GM power steering fluid. But it does not matter as long as it is power steering fluid. There just trying to sell something.
How to change the power steering pump depends on which engine your car has.
See Ganderton's Answersearch for "How do you change power steering fluid". Hope it Helps.