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John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience:  A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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2002 tahoe z71: put new ps pump and steering box and problem still

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I have a 2002 tahoe z71 package interminent power steering problem I have put new ps pump and steering box and problem still exists
HiCustomer Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-What year is your Chevy?
-What model is your Chevy?
-How many miles are on your Chevy?
-What type of engine is in your Chevy?
-What have you already tried?

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
Customer: replied 8 years ago.
this is a 2002 chevy tahoe 5.3 liter 120000 miles 4x4
Ok,tell me about your problem & exactly what you have done.
Customer: replied 8 years ago.
the owner of this tahoe has put 500 miles on it since i changed the pump and steering box and the problem still is there not all the time but especialy at low speeds and slow turns
Ok,exactly WHATis the problem ?
Customer: replied 8 years ago.
steering gets hard to turn needs two strong hands to try and steer
Does this vehicle have over sized tires or lift kit ?
Customer: replied 8 years ago.
no this is a stock tahoe
Check the power steering lines for internal separation that will restrict pressure flow.If you suspect this ,replace the hose.If no problem found here you will need a power steering pressure tester.pressure should be around 1500 psi when wheel turned to lock.This problem is usually a spool valve in the gear box ,but can be a low pressure situation.
John and 6 other Chevy Specialists are ready to help you
I hope this helps,good luck.