how can i tell if it's my power steering pump or rack & pinion? (2000 chevy express)?

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Eric

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how can i tell if it's my power steering pump or rack & pinion? (2000 chevy express)?

got stuck in a snow pile last night, and while rocking/turning back and forth to get out, my steering stiffened up. I've had a few beaters years ago that had power steering problems, but this seems alot stiffer then those were. My pump did show some age (200k), a minor grind when turning hard all the way to one side, but not a big deal and i put conditioner in it months ago. I assumed power steering pump at first, but buddy says if it's that stiff, he thinks he may be the rack & pinion. Whats the tell tale sign to look for or how can I tell which is at fault. Pumps not leaking, i was just goin to replace it in the morning till i heard it could be the dreaded other, nor feel like spending the 5 hours and hundred bucks replacing it if it's not even the issue. Help with this is much apreciated. 2000 chevy express 1500, v6, conversion/work van.
 
If it's the rack, steering stiffness would be more pronounced in the morning. I have never seen a rack in my life that caused a "stiff steering wheel all day". Usually the rack will act up first thing in the morning and after a few minutes, the steering will free up. I would do this man, call around a few shops where you live, alot of national chain shops do free inspections on these sorts of things, therefore you are out nothing but an hour of your time.
 
If it's the rack, steering stiffness would be more pronounced in the morning. I have never seen a rack in my life that caused a "stiff steering wheel all day". Usually the rack will act up first thing in the morning and after a few minutes, the steering will free up. I would do this man, call around a few shops where you live, alot of national chain shops do free inspections on these sorts of things, therefore you are out nothing but an hour of your time.
 
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