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

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.

RepairPal Verified
Average mileage: 138,000 (125,000–151,000)
9 model years affected: 1992, 1993, 1994, 1995, more1996, 1997, 1998, 1999, 2003
10 people reported this problem
1 person shared problem details
2003 GMC Yukon125,000
Leaks power steering fluid between the hydro-boost unit and master cylinder. Have not fixed yet, just add power steering fluid when needed.
Related Items:
Units with 4 wheel disk brakes may develop at situation where the park brake does not hold as...
I replaced the fuel pump 3 months ago per instructions, now fuel guage does not read correctly....
I have checked the hoses in and out from the rear unit, ian all of it's functions work, but it...
It has been checked. (1st) they thought it was the unit. Ordered a new one, replaced it, stil...

Related Content