2001 Chevy Cavalier metal on metal squeak

I've got a metal to metal squeak that's been worring me. I've checked all the brakes and they're all in good shape. It sounds like it's comming from the front end. Serpintine belt is still in good condition. The part that worries me is it comes and goes. Sometimes it'll squeak on turns, sometimes it won't. Same thing for straight aways, bumps, and when braking. It's simply not consistant. Any ideas on where else to look at would be great.