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  1. #1

    Default 2004 Yukon XL 2500 8.1L -- Hydroboost Failure

    While making a sharp turn at low speed, the power steering and brakes went out. After a little research, I am sure the Hydroboost pump failed. There was no noise, no leaking fluid, no warning at all. I called GMC and they told me that my vehicle was not covered in the recall for this part. Any suggestions? I live on an island in rural Alaska. The nearest GMC dealership is 800 miles away, and the only way to get there is by a 3-day ferry trip. I am having trouble finding the part on-line.

  2. #2
    Jr. Engineer Jamm3r's Avatar
    Join Date
    Dec 2012
    Minneapolis area


    You mean the power steering pump? Rock auto's got your choice of Atsco or AC Delco for around $100. It takes a special tool to move the pulley from the old pump to the new pump without breaking it so be sure you have that angle covered, something like this:
    Minneapolis area - 1997 K2500 regular cab long bed + 8.5' Western Unimount plow + modified transmission + 2nd battery + modified camper charge circuit + 1971 Cayo camper -and- 2004 4x4 Suburban 2500 8.1 + Maxbrake controller + 2nd battery + modified trailer charge circuit + Reese receiver, pulls 30' Airstream trailer

  3. #3
    Sr. Engineer
    Join Date
    Feb 2012
    Western Maryland/Wyoming


    Welcome to The Club. Buying online would seem like your best bet. Keep us informed, I have the same vehicle.

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