Power Brake Units May Leak Fluid From Hydro-Boost Unit on Cadillac Escalade

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: 165,500 (138,000–195,000)
4 model years affected: 1999, 2000, 2002, 2005
7 people reported this problem
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problem details
2005 Cadillac Escalade 149,000 mi,
Slow leak, then leak is more .....hydro boost needs replacement
Hydro boost needs replacing, starts out as small leak then gets worse. Power steering fluid pours right out under the car if you don't get the leak fixed and makes a whining sound
2005 Cadillac Escalade 195,000 mi,
The Hydro-Booster is leaking all over the left front wheel well. Started out as a slow leak and now is a large leak.
2005 Cadillac Escalade 138,000 mi,
Start small leak , and gets worse I fix it by changing the hydro boost , I spend around $ 280 on part and about, 2 hours of work