I have been fighting this for a while and it is driving me crazy. It does it every time i make a sharp left hand turn and sometimes while braking. It is on the drivers side but i can't tell if it is the front or back. So far I have replaced the front rotors and pads and repacked the wheel brarings. On the rears, I have replaced the pads and pulled the axles to check the wheel bearings which were fine. I at a loss. It stops and steers fine. I greatly apriciate any and all help.

 

I don't know what the problem could be but here is a bump, better late then never........

 

sounds like the belt is getting old and hard..its starting to slip on the pulleys when under PSI...it could also be the sping in the tension pully getting weak and letting the belt slip..id try a new belt first..

 

Ahh, why didn't I think about that! Would make sense that when you turn the wheel, the power steering pump pushes against the belt just a bit more then causes it to slip and make noise.
I know my belt is starting to go bad as it is making noise when running but nothing that can't be put up with for a while. At least until it starts to squeak like crazy.
It'll get louder over time but at the moment mine isn't to bad.

So give what Ron's Power Stroke said and se what happens. worth a shot.

Does your rig have to be moving to squeak or can you make it squeak while sitting in one place? If so have someone turn the wheel while you listen for where the noise is coming from.

 

It doesn't sound like it is comming from the engine compartment. It is more of a metal on metal squeak.

 

The only thing that I can think of that would cause that sort of behaviour is a sloppy wheel bearing. Rotor floats between the caliper supports OK as long as you are going straight down the road.
Make a turn and it puts a side load on the wheel which will push it against the cage and make that rubbing noise.
Look for a scarring line on the outer edge of one of your rotors.

 

Could the dust shield be rubbing the rotor?

 

A distinct possibility and something that happens a lot when working on the front axle. Don't ask me how I know.
Simple fix, roll under the truck and pull it away from the rotor a bit, and test drive.

 

Soon as a baby sitter gits here, i'm trying it. I really need a cheap fix lol