Power Brake Units May Leak Fluid From Hydro-Boost Unit on Chevrolet 2500 Pickup

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: 122,333 (90,000–157,000)
11 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000
17 people reported this problem
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problem details
1999 Chevrolet 2500 Pickup 120,000 mi,
Seal leak on the hydro-boost unit. Leaking powersteering fluid badly
1999 Chevrolet 2500 Pickup 157,000 mi,
leaking power steering fluid at unit and also inside cab onto floor causing slick brake & accelerator pedals and general mess.
1995 Chevrolet 2500 Pickup 90,000 mi,
Leak in the power brake booster for 95 CK2500 suburban. Replaced the booster!