2002 Alero Strange Noise

I have had my car for a year now. 48,000 km's I am now noticing a strange noise when I am turning left, not sure what it is. We just changed the bearing on the right side. This noise is driving me nuts, its not a grinding noise hard to discribe, any suggestions out there...please help before i spend a fortune trying to figure out....

Is speed a factor? Does it make it when going fast, slow, both?
When you push down on the body (front driver/passenger) do you hear any noise?
Does it make noise if you turn the wheel while not moving at all?