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

RepairPal Verified
Average mileage: 96,754 (44,000–160,000)
6 model years affected: 2007, 2008, 2009, 2010, more2011, 2012
34 people reported this problem
25 people shared problem details
2009 GMC Acadia78,000
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!
2009 GMC Acadia92,300
"Stabilitrak off, service brake system" with Brake warning light and skidding vehicle light both on.
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 Acadia67,000
leaking internal brake master cylinder to the booster
2009 GMC Acadia112,000
Stabilitrak off and service brakes light on and leaking under the truck. Wife backing out driveway and brakes go to the floor...
2008 GMC Acadia110,000
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.
2011 GMC Acadia86,000
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.
2008 GMC Acadia84,000
service break system light comes on. dinging sound .stability off, parking break on
2008 GMC Acadia108,000
Brake warning lights with stabilitrack light off indicates a brake booster failure due to internal leak in master cylinder.
2007 GMC Acadia155,000
"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!!
2008 GMC Acadia107,000
Haven't noticed any apparent leaking on garage floor but after getting transmission problems fixed, which was a dealer flaw, they discovered that my master brake cylinder and brake booster needs to be replaced.
2007 GMC Acadia135,000
stabilitrack off and service brake system light coming on leaking on garage floor from the rear of vechicle.
2008 GMC Acadia58,600
problem with brake booster full of braks fluid from master cylinder leak $1200.00 repair talked to GM found no satisfaction on repairs even service rep said it is a problem he has seen a lot no help from GM. not buying another GM toyota looking better all the time
2011 GMC Acadia44,000
At such low mileage it is extremely disappointing to have this same problem (at the tune of $1000), which naturally started just after the warranty period expired. I am also experiencing the steering wheel noise problem($1400)and noises from worn out lower control arm bushings($800). My recommendation is either not buy a GM (government motors)vehicle or unload it before the end of the warranty period. You can also get the 2 year extended warranty for about $3500. I will never buy another GM vehicle again.
2008 GMC Acadia150,000
Same problem stability light and traction control light. Said master cylinder leaked into booster and both have to be replaced $1100.
Service stability light comes on
Related Items:
I puchased my 2007 GMC Acadia as a second vehicle from a local dealer in October 2010. When I first test drove it, it made a crazy whinning sound that the dealer said was due to low power steering ...
I picked up my Acadia today and they found, after 25000 miles, that it needed new front brake p...
I am leaving in Bahrain and I am an owner of GMC Acadia (model 2010) since April 2011. I bought...
What is the size of the Brake Rotor Retention Nut on the rotors for 2008 Acadia?

Related Content