3500 Pickup

Power Brake Units May Leak Fluid From Hydro-Boost Unit on GMC 3500 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.

Problem Data
RepairPal Verified
Average mileage: 173,428 (125,000–278,000)
11 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000
20 people reported this problem
Viewing 1 - 4 of 4 comments
cant find booster with pushrod instaled from reman. company anywhere
leak at brake booster
not fixed yet but checked out defently leaking there
Leaking from P/S fluid from hydroboost unit, replaced unit.