squealing

I own a 2005 GMC Envoy XL SLT 5.3L V8 I have had a loud squealing noise for a couple weeks now. The noise sounds like a metal on metal squeal of some sort. I can not find the exact location where this noise is originating from, but it squeals loudly the worst when starting vehicle as well as...

SYMPTONS: 1.Car pulls to the left 2.Vibration/Light Growling around 40MPH 3.Shakes at 80MPH 4.Rubbing noise from Drivers side wheel well turning right or left 5.Left and right tires squeal around every turn. FIXES: A.Balanced all tires and inflated to exact tire inflation. a.No difference...