Brake Master Cylinder Problems of GMC Yukon

Driving the 2015 GMC Yukon, tried to apply brakes, brakes went to floor and no braking available. Had to jump a median in the road to get car stopped. Called dealership, they were aware and said drive it there, almost wrecked again pulling into parking ot at dealership. You cannot drive the car like this, very dangerous. Being told its a common problem that GMC knows about but will only fix if its 70,000 or 6 years. Not ok, fix the problem my car is still under warranty until 100,000 miles! vacuum pump, vacuum pump belt, brake booster, master cylinder and vacuum pipe all need replacing!!!!!! make a recall before more people are hurt!!!!.

See all problems of the 2015 GMC Yukon 🔎.

Started car in the morning to go to work. As I do every day. Foot on brake as usual, shift to drive, to begin a turn in my driveway, in making the left turn, which is a downward grade, applied brake, which went to floor. No resistance whatsoever, complete failure of brakes. Kept foot on brake and steered up the grade, then put car into park. Got out, opened hood. Checked master cylinder- no fluid visible at usual line. Checked under vehicle, brake fluid trailing on driveway under path of vehicle, and slow drip from under forward front driver side . Brake lines and connector completely corroded and rusted. Had I been on the road I would have been unable to stop, vehicle is driven by my son as well. Our lives and those of others in the vehicle as well as others that mead been in our path were clearly in danger. This problem should not occur, and is completely unacceptable.

See all problems of the 2005 GMC Yukon 🔎.

Brakes lines rusted which led to catastrophic failure of brake system. Repair cost $1,000. There are multiple thousands of complaints regarding this type of brake failure in this make, model, & year. This should be a mandatory factory recall. Someone is going to die because gm is not being forced to fix their faulty equipment. My vehicle was in motion and when I depressed the brake pedal the pedal went completely to the floorboard. I was driving straight ahead in moderate city traffic & narrowly missed striking the vehicle in front of me on a city street. My master cylinder was completely empty of brake fluid when examined. I was traveling 25 mph and my vehicle has 110,000 miles. (the next page wouldn't allow me to enter the speed & mileage information where it was requested).

See all problems of the 2003 GMC Yukon 🔎.

I let my freind take vehicle and she said when she braked the pedal went to floor. She was half mile away and made it back . I looked at level in master cylinder and had to put fluid in. Noticed brake fluid on the undercarrige which led me to rusted brake line up front.

The brake lines have rusted and at least 1 has ruptured leaving vehicle without any brakes. Brake petal goes directly to the floor and no brake fluid was found in the master cylinder reservoir. I have read that many other similar vehicles have had the same issue.

See all problems of the 2001 GMC Yukon 🔎.

Brake line failure from abs to master cylinder due to corrosion. Upon inspection both lines needed replacement with corrosion present on the other lines, too.

I was exiting the freeway and started to brake and then the pedal went to the floor. I had the stand on it to slow down enough to keep from hitting the car in front of me. Upon examination of the vehicle I found a ruptured brake line. Further review found all 4 lines 8 inches below the master cylinder and lower seriously corroded. Fluid reservoir was still full of fluid. The line broke out under the carriage, front driver side, just behind the front wheel well. Pictures are available of the corroded lines.

See all problems of the 2002 GMC Yukon 🔎.

Was backing up into parking space and applied brakes to stop. Brake pedal went all the way to the floor with no braking capability. Had vehicle towed to service facility and they reported that the front brake lines had rusted through causing fluid to be pushed out. I thought that these vehicles had a dual brake cylinder so that there would be braking capability on the rear brakes but that did not happen. Fortunately was going slow and applied emergency brake to stop. Paid repair facility to replace front brake lines. Second incident occurred on November, 2013 where I applied brakes prior to moving transmission from park to drive while on a hill. When I applied brakes the pedal went all the way to the floor with no braking capability. I determined that the left rear brake line is spewing fluid. Again, no braking capability in the front brake system. Had vehicle towed to a repair facility. I assume that the rear brake lines have also rusted through. I have read numerous incidents on internet about GMC brake lines rusting. This is a serious problem as there is no braking ability at all except for the emergency brake if one of the brake lines rusts. First, these lines should be made of materials that do not rust. I have multiple 60's and 70's vehicles where the brake lines are not rusted. Second, there is a problem in the dual master cylinder of these vehicles where they fail to work when either the front or the rear lines fail.

Rear brake line opened up causing the rear brakes to fail and empty master cylinder. Front brakes barely work. Estimated cost from local firestone dealer to be about 600. 00.

On several occasions when appying brakes to stop the Yukon it fails to stop and then abs kicks in causing brake pedal to vibrate and loss of pressure in brake pedal then truck does not stop it slides. I have replaced master cylinder did not help, truck needs all new brake lines due to rust. I have quickly move around cars to prevent a accident, due to this brake failure. Since I am in south florida gm won't fix this known manufacture defect because sf is not a "salt belt" state, but I live on the beach and the salt water has started to have a major impact just like the northern states on these faulty brake lines. The break lines are covered in rust and this is a major safety concern and gm should fix all vehicles with this known defect not just some. This 2002 Yukon is sle with a 5. 3l VIN z.

All of the break lines are completely rusted out. My wife had a complete break failure while driving my daughter to school. Break line over frame leading front to back failed and completely emptied the master cylinder of brake fluid, result car would not stop. This must be made into a recall, as the possibility of a major accident and loss of life is very probable.

Slow speed stop approaching a locked gate. Brake pedal was applied. Pedal dropped to the floor with complete loss of brake pressure. Brake pedal was pumped twice with the final application locking one rear wheel. The above vehicle stopped within 2 feet of striking a metal security gate. Brake fluid was observed dripping from under the drivers side compartment on to the ground. Vehicle was towed to my mechanic. Mechanic found that there was excessive rust on all metal brake tubing. One of the metal brake lines from the master cylinder to the abs pump completely rusted through causing loss of all brake pressure and brake failure. All metal brake lines had to be replaced. Before and after the incident there were no warning indicator lights that were activated on the dash.

We purchased the 2002 Yukon from mcguire dealership in NJ its been cared for taken to the dealership faithfully driven by my 50 year old father, when first driving he noticed the pedal vibrating rapidly during normal brake applications. The abs control valve was the culprit along with a rusty wheel sensor. It was replaced at the dealer and after 5 years the frame of the truck is rusting and rotting along with suspension parts and most of all the brakes. We came close to crashing one day when the pedal went straight to the floor, we take it to the local firestone and they tell us all the brake lines are rusted out along with the master cylinder. We replaced the lines and master cylinder with a hefty price tag. We get the car back 3 days later pedal goes to the floor again, back at the mechanic both rear calipers are rusted and leaking. We replaced all 4 calipers and the problem stopped but now the frame is rusting and the abs is still vibrating badly. Long story short gm needs to be held accountable for selling such cheap crappy trucks, we came close a few times to crashing, and I feel sorry for the people that have lost their lives due to the neglegence of the employees of gm.

: the contact stated while traveling 15 mph, the vehicle's brakes failed and the contact had to use the emergency brake to stop the vehicle. The service dealer replaced the master cylinder, but this had not corrected the issue. The brakes had failed on two other occasions, but the dealer could not find the problem.

No crash. Vehicle had not been driven for approximately 6 weeks prior to July 15, 2006. Vehicle was used for a short trip about 2 miles total. When brakes were applied the pedal went to the floor and longer than normal distance was required to stop. Brakes were very spongy. Fluid level checked found to be within normal range, normal color and no apparent leaks. Vehicle had approximately 27,000 miles at the time. Vehicle taken to dealership for repair of brakes (while there had 30,000 mile service done as well). Dealer advised that the master cylinder was bad (interior failure) new part was ordered and placed on the vehicle. Upon vehicle being returned the vehicle appeared to still have a very spongy pedal and the pedal traveled excessive distance (approximately 4") before feeling some pressure. Travel distance appears to still be longer than before problem was discovered. Tried driving the vehicle a few miles maybe 100 to see if anything changed with brakes. Brakes remained the same. Returned the vehicle to the dealership service manager agreed with me after testing that the brakes appeared spongy. Attempt to fix by the dealership advised they "found air in the lines, bled brake system seems to be working in proper order". I picked up the vehicle and the brakes still feel the same, spongy pedal travels approximately 4" before any noticeable braking function, stopping distance still appears to be a little excessive. Contacted GMC service online and advised of the problem and that I am in the process of contacting a different dealer to attempt service repairs. They gave me the name of another dealership to try. At this point problem is not resolved.

Hydraulic brake system. Vehicle was sitting in driveway without use for a few weeks. When used brakes were very spongy, long pedal travel before reaction then extended stopping distance. Fluid level ok, clear appeared normal, no apparent leaks, normal temperature. Drove to dealer carefully, service manager when moving vehicle said he almost ran through the back otf the building. Vehicle not in any accidents, service maintenance conducted at normal intervals according to service recommendations. Approximately 27000 miles on vehicle. Driven by myself 50 years old and my wife 47 years old safe drivers speed limit speeds large amount of stopping distance for braking not jamming on brakes at last minute. I scheduled vehicle for service at win kelly Chevrolet where purchased for brake check and 30,000 mile checkup. While there they advised it was interior failure of master cylinder and they replaced it under warranty. The brakes feel a little better but the pedal still moves approximately 4" before applying any pressure. I feel this is still a problem and will be taking it back to the dealer again. I believe they have a problem with the system like they had on previous s10 models in late 90's with the slow speed braking recall. Just want to send a complaint for you to be aware of in case you receive more complaints. I emailed a letter to gm while it was in the shop with the same comments and the reference to the previous for the smaller versions in the late 90's and have yet to receive a response. If this is the same problem then they may have a valve design, operation or part assemble/install defect with the system.

: the contact stated there is an NHTSA recall, 05v379000 concerning the abs, however the recall did not correct the problem. The vehicle is having the same problems again. Prior to the manufacturer's recall, the vehicle was repaired twice regarding this brake problems. The vehicle had difficulties stopping at low speeds. The first time the master cylinder was replaced. The second time the front brakes were replaced. The last time the recall work was performed the front and rear brakes were replaced. The dealer has agreed to inspect the vehicle again.

See all problems of the 2000 GMC Yukon 🔎.

While applying the emergency brakes. The brake failed to hold. The driver noticed while driving,the brake light appeared on the dashboard and remained on. The consumer drove to the dealer for am inspection. The mechanic informed the consumer that the sensor for the emergency brake, and the master cylinder needed to be replacemed. Please fill in additional information.

I have a 2002 GMC Yukon xl. I bought the vehicle brand new in June of 2002. At 376 miles my brake system locked up. I have continued to have this problem ever since. As your driving the brakes apply and you loose control of your steering. This problem does not occur all the time, but does happen. They have replaced my master cylinder, power booster, and all 4 rotors. This problem is still not fixed and because the dealership can not get it to duplicate the problem while they are driving it, they say there is nothing else they can do. I am filing this complaint because I fear for my safety. The last time it happened on 9/11/03 it was towed to the nearest dealership, they have informed me there is nothing they can do. I have left the vehicle there because I fear driving it. Last thing I heard was they were shipping it to the dealership where I bought it because it was there problem. Please if you know anything I can do please let me know. I would like to add that there has been evidence of defect because the rotors have shown damage due to defect.

The brake line (a metal rod, not hose) broke off, on an ice mountain road on December 23, 2002. The car was brand new with 9800 miles on it and there my three children ages 3, 3, and 5 were in the car. We were towed down the mountain for 60 miles. General motors fixed the brake line and took over two months to get back to me with a $55. 00 reimbursement for the car rental. This could have been catastrophic for my family. The car could not stop at all.

Any recall on this vehicle? no safety defect listed.

See all problems of the 1999 GMC Yukon 🔎.

No summary.

See all problems of the 1997 GMC Yukon 🔎.

Master cylinder was replaced on two different occasions. Vehicle has been taken to dealer on six different occasions for brake problems. Dealer has provided repairs under warranty until last time. Consumer has had another mechanic to inspect brakes, and mechanic found that rotors were wearing out unevenly, causing other parts to damage. The brakes were poor and not safe.

Dealer stated master cylinder was defective - master cylinder replaced.

No summary listed for this vehicle.

Master cylinder leaked all the brake fluid causing the pedal to go to the floor and the brakes to completely fail.

Major brake failure, in snow, on hill, brake pedal went to the floor after a loud rumble from the rear of the truck. Had master cylinder replaced, and 10 days later the exact samething happened, dealer installed another master cylinder. Test drove, blew that cylinder, then replaced the abs modulator along with another master cylinder, and sent us on our way. It is now two weeks later and brake failure is being noticed again, truck is sitting currently at dealership. Also, the steering went very loose around September 1998, had that checked and repaired, at this time the steering is again getting loose.

Brake piston failed.

See all problems of the 1996 GMC Yukon 🔎.