GMC Yukon Denali Problem Report

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

(10 reports)

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.

leak at booster from power steering -
hydroboost failure was triggering the Service Immediately lights and applying the brakes. replaced hydroboost for around $900 and it fixed it. -
Power steering pump went out and then hydro boost starting leaking -
Once the breech occurred, almost impossible to make right turns and braking is EXTREMELY difficult. -
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