Brake Hoses, Lines/piping, And Fittings problems of the 2003 GMC Yukon - part 1

Brake failure due to leak from rusted out brake line under driver seat area and loss of brake fluid.

My brake lines are rusted out as describe in the article below. Costing me over 650. 00 to repair. Less than 115k on my car! never had to replace brake lines before. . . I lost my brake un-expectantly during a rain storm in cohasset, MA on 1/10/2017. Luckily I was on a side road coming to a stop sign and no accident occurred nor were my 3 kids in the vehicle. I saw this article below and decided to write you. . Read more...

The brakes failed while driving on a city street causing my vehicle to nearly strike a number of children at a crosswalk. After examination by a mechanic, it was determined that the brake line had corroded and burst under pressure. I have received no notice of this potential failure from GMC even though it has been investigated by the NHTSA. Shouldn't the manufacturer have an obligation to repair this potentially lethal problem? at a minimum I feel that GMC and/or the NHTSA have a moral obligation to notify owners of affected vehicles that they are driving a potentially deadly vehicle.

Total brake failure while stationary and engaging drive mode in driveway. Brake pedal went to floor. Parking brake also soft and ineffective but restored normal condition shortly thereafter. . No brake or abs system service alerts or fault warnings prior to failure. 'service brake system' alert present after failure. No obds codes present. Suspect brake line corrosion. Approximately 170,000 miles. Recent tire/brake/alignment inspection revealed no issues. This is a very clean, "new to me" used vehicle with an excellent record of service. Had just completed a trouble free 2400 mile interstate road trip.

The stability control warning has come on several times on my vehicle. The brakes do not work, as you have to push all the way to the floor and sometimes it takes time before the vehicle stops. I have had brake lines repairs and the problem still is there. We cannot use vehicle until the issue is resolved. Our mechanic advised us to file a complaint on this issue because it is an active issue with GMC denali Yukon's for years. We need assistance to have this resolved to use our vehicle.

I was towing a 17' boat and came to a stop sign. I pressed the brake pedal and it went to the floor. The Yukon did not slow at all. Fortunately, no one was coming and I rolled through the stop sign, made a right turn, and went down a steeper hill. Pumping the brakes as I went had no effect. The dash showed a 'service brake' message. I applied the parking brake and down-shifted, which slowed it enough that I was able to swing wide into the opposing traffic lane and barely make the turn at the bottom of the hill. I pulled off to the side of the road with the right-wheels on a soft shoulder before the vehicle slowly came to a stop. I refilled the brake reservoir and had my wife press the brake pedal. It went to the floor as brake fluid shot onto the hot exhaust manifold, leaking from a rusted joint where the steel brake line joined a flexible, braided line under the hood. The brake lines were horribly rusted, unlike anything I had ever seen in my 35+ years of driving and owning vehicles (including 20 cars and light trucks). This Yukon has spent its entire life registered in virginia and has less than 80k miles on it. I can't imagine what they are like in northern states. Looking online, I discovered that this was a known problem that the NHTSA had investigated. Why was I not warned? I could have been injured or killed, as could have another motorist or pedestrian! when I called my local GMC dealer (ourisman of alexandria, va), the service advisor claimed to be unaware of the problem, the gm service bulletins that had been issued on it, and the availability of the pre-bent lines as a discounted kit from gm. He estimated a four-figure labor bill to do the work, so I am doing as much of it as I can myself using nickel-copper brake line and a flaring tool. People are going to die from this if the NHTSA does not force gm to do a recall.

Brake line failure - st. Louis mo. Brakes failed while attempting to slow from 60mph speed on christmas day. Narrowly escaped accident/collision. 2 brake lines were found ruptured/split due from rust/corrosion then repaired. Other brake lines are showing corrosion & will need attention soon. Vehicle is 2003 GMC Yukon with 101,300 miles.

Lost all braking , took truck to repair shop and the brake lines had corroded and had several holes in them. I had to replace all the metal lines on the vehicle. Brakes were fine hooked up utility trailer and pulled out of my driveway. Going down hill, applied brakes and the pedal went all the way to the floor.

I lost all braking ability while traveling the interstate highway. I was able to stop the vehicle and found brake fluid flowing from the main brake line feeding the anti-lock controller.

I was driving with my 14month old baby in the car and all of a sudden I had no brakes at all. My parking brake couldn't stop me either so I put the car in neutral and then forced it into park so I didn't crash. The brake lines are completely corroded and I didn't have any notice or idea until the brakes were already gone.

Iwas driving at low speed went to stop at stop sign when brake peddle went to floor. I crashed into stop sign to stop . Truck was towed to dealer. I was told to major brake line burst. Truck is now at dealer being fixed. At a price of 2800. 00. Something has to be done. This can't go on any longer.

Rear brake line burst without warning and brake pedal went to the floor. Upon inspection the brake line is completely rusted out.

Brake line going to rear brakes was rusted out. Situation luckily happened while my wife was backing out of the driveway. No harm or injury occurred. Disabled vehicle. Further inspection shows that all brake lines are suspect and will need to be replaced.

My daughter was driving her son, our grandson, home from school in my Yukon. As she was leaving the city limits just starting to get up to legal 55 mph and the brake system completely failed without warning. She fortunately saw a body shop and managed to maneuver the vehicle in there and down shifted to stop. She was fortunate to find this location. As you leave town there is a large hill we are thankful the brakes did not fail as she was going down it. I just am upset there was no warning, and we find out the whole brake line failed. It is hard to imagine what could have happened.

Total brake failure, no brakes. Steel brake line rusted through on frame rail near gas tank causing fluid container to empty completely. No advanced warning lamp or indication of failure. To replace the line, the fuel tank must be removed. Dealer charge $800. 00 and up.

Driving home when I push the brakes, the brakes didn't work, brake service warning came on upon checking all the brake lines are rusted and when it press the brakes it appears the pressure puncture a line.

My daughter was driving and when slowing down the brakes failed to work. The vehicle was not able to stop and collided with the vehicle in front. Luckily nobody was injured in this collision. After inspection, I noticed fluid on the ground at the rear left (driver's side rear), and looked under the vehicle to see where the fluid may be coming from. I saw that there was fluid coating a large area of the underbody, and also see the brake line attached to the frame as wet and rusted. I have pictures saved as a reference.

I was driving on the highway at approx. 60 mph. . . When all of a sudden I heard a chiming noise and my "service brake system" alert came on! I then attempted to slow down and to my unfortunate discovery the brake pedal went straight to the floor. (scary) I let the vehicle coast a bit to slow down and tried pumping my brakes. . Now please keep in mind I was driving with my 2 children in the back seat. (scarier) I was able to slowly stop and pull over. I discovered the rear brake line was leaking. . Long story short my husband came and was able to drive it home. . But basically by the grace of god!!! I did some researching- calling a few different dealership and service locations and was told it would cost anywhere from $1,500 to $600. 00 to have the lines replaced,ect. I am furious that gm is trying to throw this on the consumer stating this was a "maintenance issue". . . I have read numerous stories of people (real people) having this same problem, but gm wants to say this is out fault!!?!?!? no way. . . Is there any recourse? thank god we did not have an accident. Husband had a friend of his who works on vehicles take a look and stated the lines were completely rusted and corroded!!*.

The contact owns a 2003 GMC Yukon xl 2500. While driving approximately 70 mph, the brakes failed. When the contact attempted to apply the emergency brake to slow down the vehicle, it also failed. The contact was able to downshift enough to stop the vehicle. There were no warning indicators illuminated on the instrument panel. An independent mechanic stated that the brake lines were corroded and one of the lines was severed. In addition, brake fluid was leaking from the vehicle. The vehicle was not repaired and the manufacturer was notified. The approximate failure mileage was 166,000.

The contact owns a 2003 GMC Yukon. The contact stated that the brake pedal was depressed and traveled to the floorboard. In addition, the contact stated that the was a leak coming from under the vehicle. The contact discovered that the brake lines were entirely rusted out and fractured. The vehicle was not able to be driven and was towed to the contact¿s residence. The vehicle was not diagnosed or repaired. The vehicle was not included in NHTSA campaign id number: 04v045000 (service brakes, hydraulic). The manufacturer was notified of the failure. The approximate failure mileage was 138,000.

Driving vehicle when brakes went soft and failed pulled over to side of road, towed car home replacing all brake lines due to excessive corrosion.

The problem: brakes failed while vehicle was running. After a hard brake at a stoplight and driving briefly, the brake pedal went straight to the floor barely stopping the vehicle. Brakes were extremely mushy to non-existent at times. Repair work: local GMC service department indicated the brake line had rusted out and they replaced it for close to $1,600. Per the invoice repairs included: brake system repair/labor, brake flush kit, pipe kit and fluid. (when asked about brake line issues later, the dealership stated they have never heard of any problems regarding them with Gmcs. ) how it happened: while driving with my wife and children in the vehicle, I had to break hard when I came around a bend to a red stoplight. Though the brakes worked, they felt like they were giving just a little after I finally came to a stop. We preceded another 15-miles with no incident and pulled into restaurant drive-thru. While sitting in the drive-thru lane with the vehicle in gear and my foot on the brake, all of a sudden my foot went to straight to the floor and the vehicle jumped forward. Thankfully there was enough space between my vehicle and the vehicle in front of me so that I didn¿t hit them. I immediately shifted it out of gear to stop the vehicle from moving forward. At this time I noticed a warning light had come on indicating to check brakes and that the abs was off. I tested the vehicle in a nearby empty parking lot to see if it was still drivable and the brakes appeared to have only a little bit of ¿stoppage� though the pedal was to the floor. I realized it took 50-100 yards to stop the vehicle with brake fully pressed and no gas when we were going 20-25 m/h.

I own a 2003 youkon xl went to stop hard truck took to long to stop. Went to smithtown chev says brake lines rusty and there is seepage at all fittings. Truck laid up.

Lost brakes due to rusted failure of metal brake lines. The brake pedal went to the floor and I had to drive off the road to avoid an accident.

Coming down an onramp onto the highway, I braked to yield only to have the brake pedal drop nearly to the floor. This caught me off guard and as I was forced to merge into traffic I attempt to apply the brake again only to have it drop further. So I attempted to gradually apply the emergency brake but it also ended up fully extended and having no effect. With main braking power almost gone, I used a lower transmission gear to slow the vehicle and exit the highway into a parking lot. There I discovered excessive brake fluid loss coming from the driver side rear wheel/suspension area. Dealer repair report: "found vehicle to have lost breaking ability. Found rear brake lines from abs hub rusted out causing system to loose braking. Removed and replaced rear brake lines from abs hub to master. " considering the busy highway I was entering and absolute no warning from the vehicle either by electronics or "feel", I consider it a miracle I was not in a crash or worse. An ase certified mechanic told me that the brake lines corrode, likely due to winter road salt exposure over time, and on the Yukon are in a location in the rear that makes it difficult if not impossible to inspect other than by "feel" (instead of visually).

I was driving our 2003 GMC Yukon xl home and the brakes went the floor, let me tell you this is very scary especially with such a large vehicle. Luckily I was a block away and made it home pumping the brakes. The brake lines broke just above the rear axle. Both lines come out of a connector and they were very severely rusty, it is tough to see unless you remove the spare tire. If you look at the same brake lines that run across the rear axle, they look fine. Don't let that fool you, they may be very rusty up farther where you can't see. Doesn't make sense to me, but we also lost our brakes with no warning in our 2002 GMC Yukon. This has happened with 2/2 GMC from 2002 and 2003 there must be many others and accidents from this happening, its a very fast loss of brake fluid with no warning. Gm has to do something about this if they want our business again.

I was traveling on a two lane county road located in oldham county kentucky and upon approaching a curve, I attempted to apply the brake to slow the vehicle but the brake pedal went to the floor and provided no braking action (severely rusted brake lines burst and resulted in total brake failure ). The curve was followed by an intersection with a stop sign in my lane. Luckily there were no vehicles in front of me and no opposing traffic at that moment, which enabled me, through the use of gears and the emergency brake, to get the vehicle stopped just beyond the stop sign. It was my understanding that modern vehicles were designed with redundancy in the braking system which would prevent total braking failure, but apparently that is not true with this vehicle. I have read several accounts of similar failures with this family of vehicles and I think action needs to be taken quickly as the next victim may not be as fortunate as me and my 10 year old granddaughter were this past week.

All automobiles in north-America should have stainless steel brake lines and fuel lines to prevent corrosion, it only makes sense and its not the end of the world as far as cost; brake failure is probably the most dangerous thing that can happen that can be life threatening. I am aware that auto manufacturers want us to replace components and make money down the line, but brake components such as brake lines have to be excluded from this.

Lost all braking when attempting to stop for traffic signal. Pedal went to floor- no warning . Brake line from front to back rusted thru.

My wife was driving our kids in the neighborhood for halloween. There were lots of people and small children walking from house to house. She went to put the brakes on an the truck would not stop. She was able to blow the horn and avoid hitting anyone and came to a stop after rolling through a stop sign. I inspected the brake lines. The brake line that goes above the rear driver side tire is completely rusted and failed. After further inspection all of the brake lines will need to be replaced to avoid this from happening again. This should be recalled. You can bet if someone was injured this would be a much bigger problem. Why do we have to wait for someone to be killed from poor design and poor materials?.

I was backing out of the driveway and the rear steel brake line blew out. I know the car is 10 years old, but I live in southern virginia where we very rarely get snow and they never salt the roads.

Brake lines corrosion caused total brake system failure. Fortunately, no one was injured or killed.

Brake line popped causing my 2003 Yukon xl to rear end a car stopped at a light at 30 mph glad I am not seriously injured scariest thing that ever happened in my life not being able to stop and had plenty of room. Time for a class action suit if not one already in place. This is lives people!.

After stepping on my brakes aggressively to stop for a dog crossing the road. I received a brake stability notice on my dash. Since I was in the middle of the road, I put the car into drive to get over to the side of the road. The car did not slow down after I pumped the brakes, and tried to throw the car in reverse to reduce the speed. I coasted into a parked Subaru on the side of the road and because of the rear impact the Subaru that I hit pushed into Toyota highlander in front of it. Therefore three cars affected by the accident. My children were in the car with me and that was the worst part, I would have coasted right into a busy intersection on main street had I not stopped the way that I did. After taking the truck to my mechanic he mentioned that I popped two brake lines.

While travelling at a speed of 45 mph on route 47 north of yorkville, illinois, I applied the brakes at a yellow light at the intersection of cannonball road. The pedal went all the way to the floor and I passed right through the intersection on red! the only way I could stop was to veer off of the road into the grass. The brake line that feeds the front wheels rusted through and one broke. I thought that a split system the rear would still work?.