Power Steering on 2002 Cadillac Escalade EXT

Having trouble turning left. Have replaced Power Pump already. Right turning is good. What part should I be looking for? Power Steering Gear? Next:I unplugged the Steering Column bottom adapter and reinstalled..Did not work. ALso, did put vehicle on jacks but no difference. When the car is stationary and engine on, I turn left and the car starts whinning and stiffen up..Infact, sometimes it locks up. When I am stationary and engine on, I can turn left easier when I push in the Gas in and it actually helps move the Steering wheel. Can it be the Power Steering Gear Box? How about the Hydro Booster system?

by in Renton, WA on September 24, 2009
2 answers 1 comment
ANSWER by on September 24, 2009
With the front of the vehicle jacked up and off the ground, does the steering require the same effort to turn full left to full right and back? Now start the engine and do the same test. Is there any unusual tire wear on either front tire?. Could it be as simple as an alignment problem? Too much toe set or camber, castor issue? Prior t o replacing parts I would have the vehicle examined and get a professional opinion.
ANSWER by on September 24, 2009
Check to see if you have electronically variable steering. If there is a connector with wires on the pump and one on the bottom of the steering column you do. Unplug them & see if it changes. Just a shot. Sometimes they do weird things.
COMMENT by on September 24, 2009
Just had it fixed. It was a Faulty Power Steering Gear Box. Replaced it and now working. JR
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your advise to another was to replace rack & pinion, my truck has 76000 miles and sets a lot. would lucas product help me. the problem just started and not severe yet.
what is a hydro booster?