squealing noise

With the engine off check that the belt tension is correct, make sure the belt is not contaminated, cracked or failing due to wear. Check the Power Steering Fluid level. If these are OK perhaps the pump has a problem but most likely a belt issue.

I had the same problem. Horrible noise. If the first answer didn't help use some Dupont Silicone Spray Lubricant on the pulley. Worked like a charm. Have to reapply once per year. Doesn't seem to affect performance.