What could be the squeaking noise on drivers side front end on saturn vue?

A salvage yard would be a likely source of interchangeability information.

does the screeching noise only happen when you put your foot on the brake-if so then you need to replace the brake pads-when you step on the brakes with a warped rotor you can feel the brakes pulsating-if you had a lower ball joint going bad it would make a rusty hinge sound-you should check at a shop that does front end alignments they can tell you for sure if its a ball joint-I would have them replace both sides and get an alignment done-cheers Denny p s they could check your brake pads too-

Worn control arm bushings, worn stabilizer bar end links or bushings. Worn strut mounts. Worn ball joints, worn tie rod ends (less likely)

I have a clunking noise in the front of my 06 saturn vue , all front end parts are ok

If it is not your brakes, or your rear shoes, being so they have been replaced, you may have a wheel bearing bad in the rear, or you may have a caliper that is not releasing pressure on the slides causing the brake to drag just a little. I think sense it is coming from the rear of the vehicle i am going to lean towards it being a wheel bearing. One more thing you can try, push the emergency or parking brake on half way when you hear the squeak not enough to lock up the brakes but enough so the brakes touch the drum. If the squeak stops then your parking brakes are you culprit!

There is a TSB for your complaint from Saturn: Here's the jist of it.

Condition: Some customers may comment on a squeak or squeal noise coming from the base of the steering column while turning vehicle.
Cause: The squeak or squeal noise may be caused by insufficient lubrication of the intermediate steering shaft-to rubberboot- contact area.
you may be able to get it warrantied through saturn. this is the TSB #
#03-02-34-002

thee are shims that cme on the car new if these are not there it will click when brakes are applied

that sounds like the squeler fo the brakes and you might want to check to see if they need to be changed and/or have you had them changed yet?