Car Problem Reports

GMC Yukon Power Brake Units May Leak Fluid From Hydro-Boost Unit

GMC Yukon Problem
10 Reports
Me Too

Model Years Affected: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2003

Average Mileage: 138,000 mi (125,000 mi - 151,000 mi)


Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to correct this concern.

  • Visitor, , 125,000 mi

    Leaks power steering fluid between the hydro-boost unit and master cylinder. Have not fixed yet, just add power steering fluid when needed.

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