1993 GMC Sierra Power Steering intermittent after hot

1993 GMC SIERRA
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DIGGS112
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Steering problem
1993 GMC Sierra V8 Four Wheel Drive Automatic

Power steering will work fine first thing but once I drive for awhile it goes in and out. Will be really hard to turn then all of a sudden it goes back to normal (frees up all of a sudden). Checked the fluid and is all topped up, is this likely the power steering pump?
Apr 14, 2010 at 9:28 PM
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BMRFIXIT
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Few to check and do
Start by flushing the system
Check steering shaft U joints
Check steering box
Apr 19, 2010 at 6:41 AM