I changed the pump in Jan of 08 but the pump whines. I did the proper bleed by having the front wheels up off the ground engine off and turning wheel lock to lock.
Even after doing this twice a few weeks apart with at least 75 turns of the wheels , I can still see air bubbles in the reservour when doing this. I don't have any leaks but air must be getting in somewhere , could it be the steering rack or could a line be sucking air without leaking ? maybe a bad pump?
Anyone with ideas I realy hate the way the car sounds.

I'm gonna bump this thread for you because I seem to be having the same problem. I thought it was getting better but I'm not sure anymore.
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FSM says not to turn it lock to lock when bleeding. Air bubbles are a bad sign. I'll scan some pages & post them. It might be a while.

I have the GM service manual and it says on page 3B-3 to turn the steering wheel lock to lock at least 20 times.

I should have said the 99 FSM says not to turn it lock to lock. I don't know if the pump design changed or if GM just changed the bleeding procedure. If either of you want the scans PM with an email address.