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Michael Posted on Jul 16, 2015
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What would cause power steering fluid to be leaking on the inside on the driver side firewall. Looks to be coming from where the brake peddle presses into the hydro boost.

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paulmacintyre

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  • GMC Master 3,218 Answers
  • Posted on Jul 16, 2015
paulmacintyre
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The power steering fluid is used to create pressure for the brakes thus elliminating the need for a vacuum brake booster. If you are experiencing a steering fluid leak it is most likely because of a defective / leaky high pressure hose usually at one of the hose crimps. Do to the high pressures involved, it is not uncommon, after time for these hoses to to become weak/worn and develop leaks. Periodically flushing the power steering fluid can add to the life expectancy of these hoses

  • 1 more comment 
  • Michael
    Michael Jul 16, 2015

    I changed that hose. But where the brake pedal pushes a rod into the hydro booster that where it's coming out of. Don't know if there's a seal in there that might be leaking

  • Michael
    Michael Jul 16, 2015

    Thank you

  •  johnny rebel
    johnny rebel Jul 17, 2015

    ohh,its your booster,yes,there is a seal,its the brake booster that needs replacement

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  • GMC Master 10,875 Answers
  • Posted on Jul 16, 2015
 johnny rebel
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Your high pressure line is rotted out,replace it

  • 3 more comments 
  • Michael
    Michael Jul 16, 2015

    Did that already

  • Michael
    Michael Jul 16, 2015

    Thank you

  •  johnny rebel
    johnny rebel Jul 16, 2015

    still leaking?

  • Michael
    Michael Jul 16, 2015

    It's leaking out of the hydro boost on the inside of the truck

  • paulmacintyre
    paulmacintyre Jul 17, 2015

    Sorry Michael for the timely reply. If fluid is leaking on the INSIDE of the firewall, it will be due to a defective seal in the hydrboost unit. I am unaware of any seal kit that may be purchased to correct this issue. The only repair I would recommend is replacing the hydroboost assembly to correct this problem

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