2004 GMC C2500

Engine Mechanical problem
2004 GMC C2500 V8 Four Wheel Drive Automatic

This is a Duramax diesel 3/4 T. I do not have power steering. Asked a mechanic, a friend of mine, what he thought could be the problem. Said sometimes there is some kind of rod in the pump that breaks-need new pump. I had my mechanic in the shop put one?On and it did not make a difference with the power steering. Is there a fuse or some other thing I can have check?
January 5, 2010.

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