What makes the power steering in a 2003 Chevrolet Cavalier squeak or whine?
low fluid would cause this or the pump could be going out
This is almost always caused by worn drive belts. Replace all the belts at the same time. If it has a serpentine belt, then replace it. Be sure and check the idler pulley to make sure the squeak is not coming from the idler pulley itself. Another possibility is a bad alternator, water pump, or power steering pump. Check them all.