Question about 2004 GMC Envoy

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2004 4.2 ltr envoy power steering stopped working - no leaking

My son did a brody, the power steering stopped working - there are not fluids leaking. Could the pump have gone out and needs to be replaced?

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  • john543 Jan 07, 2009

    That was very helpful and yes the shaft broke off deep in the power steering pump. It appears that this is a common defect with the GMC power steering pumps for the Envoy. It only took about 1.5 hrs to fix, but I had to get someone else to pull the pulley off of the broken shaft and then press it back on. One think that you should not forget to do is put the o-ring in when you put the pressurized line on the new pump.

  • Anonymous Mar 25, 2014

    Hose on racking pin has hole in it

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Most likely the power steering pump is your problem. It sounds like the shaft inside the pump has broken and it is not pumping fluid. I would install a new pump and see what happens. The other option would be the rack and pinion (steering gear). The power steering pump is the cheaper of the two and usually the problem. I hope this helps you.

Posted on Jan 06, 2009

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