you need a Gm p/s pump pulley puller to get your pulley off that shaft, then put that pulley on the new pump.
easy enough job now that you can see the 2 bolts that hold the pump on lol
you'll want to jack the front pass side up, take the wheel off, then un hook the 2 lines under the pump, have a pail to catch the fluid that will pour out. then take the pump off, swap the pulley, then put the new pump on.
the pumps runs 40 bucks or so, and the puller you can rent. dont even think about using another puller, the GM p/s pulley puller is all you can use. or you'll be looking to buy a new pulley for the pump.
