GMC Acadia Problem Report
GMC Acadia Brake booster failure due to internally leaking brake master cylinder
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! - Visitor
Internal brake fluid leak. Master cylinder and brake booster to be replaced at a very high price! - jtwaddell
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. - Autohaus Lake Norman
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. - bawhalen
leaking internal brake master cylinder to the booster - Visitor
Brake fluid leaking toMaster cylinder Alarms stabilitrak off & service brake system - Brenb
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. - Visitor
stabilitrack off and service brake system light coming on leaking on garage floor from the rear of vechicle. - Visitor
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 - Visitor
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. - Visitor
Same problem stability light and traction control light. Said master cylinder leaked into booster and both have to be replaced $1100. - Visitor
Service stability light comes on - Visitor
Brake cylinder $500 - Visitor
Stabilitrac message light came on - Master Cylinder and brake booster replacement required. - Visitor
No noticeable problem but cant pass inspection due to leak on master cylinder into booster pump. Cost by dealership. $615. - Visitor
$1989.00 LATER. - Visitor
Brake works fine sometimes, but just started failing last week. I apply the breaks and it goes all the way down but car does not stop. Need to pump brake and then it stops. It freaks me out! Diagnosis is to replace booster and master cylinder for $714 at dealership. Not fun since just replaced the transmission at 101K mi for same Acadia for $3,300. What's next? - Visitor
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need e-brake adjuster
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