Question about 2001 GMC Yukon XL

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New Power steering pump but no p/s @ low RPM

2001 5.3 yukon with no power steering. 2001 yukon with no power steering. fluid level good. belt looks good. Any thoughts? Went out while backing up with camper. Wheel was turned all the way to one side and a small thud/bump was felt in steering when it went out. More 2001 yukon with no power steering. fluid level good. belt looks good. Any thoughts? Went out while backing up with camper. Wheel was turned all the way to one side and a small thud/bump was felt in steering when it went out.
Comments: Additonal info - Jul 07, 2009 - I was in the middle of my yard which is all grass. I cannot think of anything that was hit. I had to pull in and out of the spot a couple of times due to the difficulty of where I was putting the camper (Had to weave around some trees) but no major torque / collision was put on the front wheels. Just moving from one direction to the other in grass numerous times.
Additonal info - Jul 13, 2009 - Ok. So I installed a new p/s pump and now I only have power steering when revving the truck to 4-5000 RPMs. I bleed the system as the manual stated (which states specifically not to max the steering on either side lioke the auto parts store said). I am wondering about 2 things now... 1) is the pressure sensor bad? 2) Did I get a bad reman pump? Any thoughts/comments would be a great help.

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  • jrthomas81 Jul 13, 2009

    That sucks! This pump isn't the easiest pump I have ever replaced. And on top of that, the guy that was at the counter of the auto parts store can't walk, talk and chew bubble gum at the same time. He probably won't exchange the pump either. Could the problem possibly be the belt or pully slipping?

  • Seth Quisler
    Seth Quisler May 11, 2010

    is the new pump just like the old pump, is it the same size, same shape, same demsians.

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  • GMC Master
  • 6,982 Answers

Don't think the pressure switch would do that. Sounds more like a bad pump (they have people that can't tie their own shoes building this stuff thanks to outsourcing to other countries) Failure rate on rebuilds is far higher than it used to be. Reason I believe the pump may be the problem is that it does seem to work at high rpm's...tells me that it either has an internal pressure bypass or not making enough pressure. Could be wrong, but I'd get another one first.

Posted on Jul 13, 2009

  • Richard Scordino Jul 13, 2009

    If belt was slipping etc, it would be screaming and you would know it right away...Just for laughs you could jump across the pressure switch to see if the problem changes. As for guy at parts house, nine out of ten times when I go to get a part, I have to help the guy at the counter look stuff up...If I don't, I always wind up with the wrong stuff!!!
    Used to be that my only worry was that the parts delivery guy would not get "lost" on his way to my shop...even had one deliver his lunch instead of ignition parts once!!! Now, "that guy" is allowed to work behind the counters of parts houses all over the country!!! (and next week, he'll be the manager!!)


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