You can't without a special power steering pulley remover/installer.
Best left to shop.
How to change power steering pump 1995 olds cutlass supreme SL 3.1 ?
after you remove the belt you will notice holes in the pully the 3 bolts that hold the pump on are behind the pully so you have to line the holes up with the bolts and use a small ext and a 10 socket and remove the 3 bolts from the pump then remove the lines
