I would have to say ball joints or tie rod ends while turning, could also be pitman arm or idler arm. Balljoints would be your most likely suspect though. If it squeeks while going over bumps, also I would suspect sway bar frame bushings, if you remove them, clean them, and grease them with a good quality litmium grease, it should take care of it. Or for a more permanent fix install bushings and brackets that are greaseable, I am sure you have noticed none of your front end components are. | 
