Car Problem Reports

GMC Acadia Brake booster failure due to internally leaking brake master cylinder

GMC Acadia Problem
17 Reports
Me Too

Model Years Affected: 2007, 2008, 2009, 2012

Average Mileage: 84,434 mi (66,666 mi - 111,538 mi)

  • Visitor, , 78,000 mi

    I got a msg on my dash that read "stabilitrak off", then "check brakes". Took it in & they tell me the master cylinder was leaking brake fluid & it leaked right onto the brake booster (design flaw maybe?) so I had to replace both master cylinder & booster to the tune of $1100! Not too happy with it at all. Definitely won't be purchasing another GM vehicle in the future! Never had any issues with my Honda. Should've stuck with them!

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  •  Rookie

    Internal brake fluid leak. Master cylinder and brake booster to be replaced at a very high price!

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  • Profile_thumbnail

    Service brake system message, sometimes Service Stability, red brake light and TRAC OFF message.
    These are sometimes the result of low brake fluid, but no obvious leaks are noted. Due to the design of the master cylinder and brake booster, the master cylinder can leak from the rear seal and collect inside the booster, leaving no drops on the ground or obvious signs.

    You will need to replace the master cylinder and booster to correct.

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  • bawhalen, , 111,538 mi

    Same scenario stabilizer light off and check brake indicator. Master cylinder leaking in tobrake booster $900 repair bill. Obviously a design issue will not buy another GMC product.

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  • Visitor, , 67,000 mi

    leaking internal brake master cylinder to the booster

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  • Brenb, , 70,000 mi

    Brake fluid leaking toMaster cylinder
    Alarms stabilitrak off & service brake system

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  • Visitor,

    Service stability light comes on

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  • Visitor, , 100,000 mi

    Brake cylinder $500

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  • Visitor, , 88,500 mi

    Stabilitrac message light came on - Master Cylinder and brake booster replacement required.

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  • Visitor, , 80,000 mi

    No noticeable problem but cant pass inspection due to leak on master cylinder into booster pump. Cost by dealership. $615.

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