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

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Average mileage: 92,608 (35,000–160,000)
6 model years affected: 2007, 2008, 2009, 2010, more2011, 2012
49 people reported this problem
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Viewing 1 - 20 of 31 problem details
2009 GMC Acadia 92,300 mi,
"Stabilitrak off, service brake system" with Brake warning light and skidding vehicle light both on.
2009 GMC Acadia 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!
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.
Internal brake fluid leak. Master cylinder and brake booster to be replaced at a very high price!
Brake fluid leaking toMaster cylinder Alarms stabilitrak off & service brake system
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.
2008 GMC Acadia 84,000 mi,
service break system light comes on. dinging sound .stability off, parking break on
2008 GMC Acadia 67,000 mi,
leaking internal brake master cylinder to the booster
2012 GMC Acadia 58,000 mi,
"Stabilitrak off, brake fluid light constantly coming on, Brake warning light and skidding vehicle light both on. After reading manual stated 1 of 2 options 1.) brake lining worn 2.) hydraulic brake leak Well it was neither so now I have to take to dealer to see if it is I guess need to replace the master cylinder and booster to correct. This will be a difficult amount to pay. Is this normal??? Should this be a recall
2009 GMC Acadia 112,000 mi,
Stabilitrak off and service brakes light on and leaking under the truck. Wife backing out driveway and brakes go to the floor...
2011 GMC Acadia 86,000 mi,
2011 Buick Enclave. Replaced brake pads and one caliper at 86K and a few days later squeak noise in brake pedal was heard. Buick dealer diagnosed as brake master cylinder leaking into booster.
2009 GMC Acadia 82,354 mi,
Fluid leaking into Brake Booster from Master Cylider
2007 GMC Acadia 54,000 mi,
2007 Saturn Outlook (but similar enough). I took it to the dealer to replace the Transmission Control Module... During vehicle checkup, it was discovered that the master cylinder is leaking into the brake booster. I will replace both items myself ( unless GM finally makes this a recall issue!)
2009 GMC Acadia 73,000 mi,
Brake booster pressure sensor!
2007 GMC Acadia 110,000 mi,
Two lights came on, the light that shows the road (I don't know if its called a road tracker or something) and brake light came on. I had to get it fixed, it cost me $812.00
2010 GMC Acadia 83,700 mi,
Have a 2010 Enclave. "Stabilitrak off" message along with "service brakes system" warning lights. Dealership says bad seal between master cylinder leaking brake fluid into brake booster. $700.00
2008 GMC Acadia 110,000 mi,
Stabilatrak light came on. Took in was told it was just a faulty read and the dealership hit the reset button on the console to have error code erased. Fast forward a few more months and no more warranty. Took to 2 different mechanics (mainly cause the dealership has done me wrong several times) and both said faulty master cylinder. Now I need a new master cylinder and brake booster. Prices range from 675 to 900.
2008 GMC Acadia 108,000 mi,
Brake warning lights with stabilitrack light off indicates a brake booster failure due to internal leak in master cylinder.
2007 GMC Acadia 155,000 mi,
"Stabilitrak off, service brake system" with Brake warning light and skidding vehicle light both on.
Internal brake fluid leak and master cylinder and brake booster to be repaired only had this vehicle for six months!!