if its squealing and hard to turn, its over johnny! hes the how to http://www.grandprixforums.net/power_steering_pump.php

edit: i just re read and you say you replaced it already and its squealing, it may be a bad pump, how long ago did you buy it and was there a warranty?

hard to the left usually means its time for a rack and pinion, my pump and rack both went out at the same time it would seem.