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GMC 1500 Pickup Problems

Power Brake Units May Leak Fluid From Hydro-Boost Unit on GMC 1500 Pickup

Problem Description and Possible Solution

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.

(11 people reported this problem)

GMC 1500 Pickup Vehicles With This Problem

RepairPal Verified
Average mileage: 120,000 (120,000–120,000)
10 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999
Not Your GMC 1500 Pickup Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
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