Why are you replacing your PS pump? Is it bad? If not, you should leave it be.
Yes, the whole steering unit and everything is shot.
My 1997 Grand Prix GTP progress build thread! Mods At The Moment: 160+ Amps Alternator. Mods I Will Be Doing In 2015: Speed Daddy Headers, 3.4" Modular Pulley System, Open Air Intake, BillBoost Tune, TransGo SK® 4T65E Transmission Shift Kit, 180* Thermostat