The drive belt is loose.
In this case, it's the 'serpentine', aka accessory drive belt.
See "Related Questions" below for more about replacing them
A power steering pumps as much as the power steering pump can pump.
Mine is 2001 Jeep Grand Cherokee and it cost me total $164 ($89 for labor + $63 for parts + tax)
Steering becomes much harder.
The output of a power steering pump is the high pressure side which goes to the steering box. It creates hydraulic pressure which makes steering much easier.
The 2010 Chevy Cobalt Power Steering costs about $400.
It depends on how much of it you have.
The 2010 Chevy Cobalt power steering wheel will cost you about $400.
A squealing noise is much more likely to be related to the serpentine belt. Change the belt its worn / loose and it's slipping.See "Related Questions" below for more
There is not much difference between power steering and transmission fluid. Many people use power steering in place of transmission fluid because it is cheaper.
I paid $ 129.99 at the GM dealership for power steering flush & fill with synthetic fluid.
about $300 to $450
about $300 to $450