Eric,

Hope everything is going well with you.

Kestas describes the correct way to flush and change p/s fluid. This is even the method that is on the ASE test.

There is no need to buy your p/s fluid at the dealer. Just get the quarts marked Power Steering fluid at your favorite store, be it Wal Mart, Auto Zone, Napa or whatever.

Sucking the reservoir dry and refilling it does very little more than not changing it. This would be about the same as draining a quart of oil out of your crankcase, pouring in a quart and then thinking that you have changed the oil.

Good luck,