Power Brake Units May Leak Fluid From Hydro-Boost Unit on GMC Suburban 2500

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.

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Average mileage: 157,500 (150,000–165,000)
8 model years affected: 1992, 1993, 1994, 1995, more1996, 1997, 1998, 1999
11 people reported this problem
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problem details
1997 GMC Suburban 2500 165,000 mi,
I lost power steering and power breaks. Everything works with "Armstrong" steering and breaks, but there is no way my wife can use it this way.