Brake Hoses, Lines/piping, And Fittings problems of the 1999 GMC Sierra 1500 - part 1

During normal straight stop from 50 mph on rural county road, intersection with 70 mph crossing 4-lane divided state highway, pedal went to floor and braking ability was minimal. Emergency brake needed to complete the stop before entering crossing high-speed traffic. Upon inspection, discovered brake line ruptured due to rust with massive instantaneous fluid loss.

Brake line failer do to poor routing from factory and substandard material used on oem lines (bare steel) . Always replace oem lines with powder coated aftermarket or stainless "only" inspect "all lines & hardware & clips to frame ect for corrosion". Brake failer occured while towing another auto with trailer attached no warning.

I am the original owner of a 1999 GMC sierra that just had brake line failure on 7/14/16 on the interstate that caused an acccident. I had complete loss of brakes, pedal to the floor. I used low gear and park brake to minimize damage but still made contact. It is currently at patriot Buick GMC in williamsburg va for repair where I bought it new. I feel me having to pay $1000+ for the brake line repair and now a court date and insurance issues that are not my fault. We need to discuss GMC making some restitution as there is no rust anywhere else and this truck has only been in va. I have other gm cars from the 60's, 70s and 2000s that have no rust issue. Fuel line was leaking as well and some needed replacment. Gm service request 8-2250924255 I also had the ps rear brake rotor shield come off and scrape moving parts last year. Turned itnto dealership as a problem. This truck was TSB'd years ago for line inspection.

While operating the vehicle at approximately 45 mph, I was approaching an intersection when I applied the brakes to slow the vehicle. One of the rear brake lines bursted causing me to have to abruptly pump the brake pedal to stop the vehicle. Very dangerous situation as a marked sheriff's vehicle with its emergency lights and siren activated was traveling at a high rate of speed on the intersecting highway that I was approaching. This is a known and prevalent problem that exists with gm trucks and gm is well aware of the issue but denies faulty parts.

Brake lines leaking from corrosion leading to no braking.

I was backing out of my driveway when my brakes went to the floor, always noticed how rusty the truck is underneath, and the outside looks like new. What had happen is a whole in my brake line . I done some research and noticed about 6 million other people have had the same issue. . Definitely think gm should pay for new brake lines, why would they build a vehicle that's not safe for at least 15 years. . Don't think I'll ever own another gm product.

I was in a driveway and attempted to stop to turn onto the main road, when I pressed the brakes they went to the floor. I used the park brake to stop and returned home. I found the leak, it is on the brake line where a group of four lines run along the frame under the drivers seat.

Put vehicle in gear , no brake pedal . . . . Brake lines were rusted and failed. . . . . . . . . Had all 5 lines replaced. . . . . . . . .

Brake pedal went to floor due to premature brake line failure. Was able to down shift and curb the vehicle to stop in time.

Stopped in my driveway to get newspaper and mail. I got back into the truck and applied the brake to shift into drive. The brake pedal went to the floor. I coasted up the driveway and was able to stop. When I got out of the truck there was a trail of brake fluid. The leak was coming from under the driver's seat area, where the brake line attached to the abs pump. My mechanic had to replace all of the brake lines.

The contact owns a 1999 GMC Sierra 1500. While driving at an unknown speed, the brakes failed as the brake warning indicator illuminated. The vehicle was taken to a mechanic, who stated that the brake lines failed and were rusted. The vehicle was not repaired and the manufacturer was notified. The failure mileage was 60,000.

While driving highway speed (70 mph) my grandson pressed on the brake to slow down at an exit and lost all but 1/2 in of brake pedle. No accident but barely stopped before an accident occurred. And he is only 17 yrs old and was badly scared. . Repair shop changed the rear brake line from the abs module to the rear brake connection due to being rusted through. Cost was $451. 00. It was also noted that the other 5 brake lines at the abs module were badly rusted and needed replacement.

While I driving my 1999 GMC Sierra 1500 pickup,the brake acted very soft when I was coming to a stop on the roadway. I thought at first that I was low on brake fluid. But was able to drive the truck to my mechanic and he checked it out and found the brake lines had corrosion and a small hole opened up throw brake fluid all under the undercarriage in the rear drivers side of the truck. He told me that this isn't the only truck he has seen this problem. I feel that something needs to addressed soon, before people get hurt or killed because of the loss of there brakes. I was just lucky that I was driving down a hill and the normal speed limit. I think this problem has been occurring and needs to be addressed to GMC to do a recall on all there 1999 GMC trucks.

The brake lines under the drivers door on the frame are all rusted and have started to leak from excessive corrosion. Just noticed the leak as the truck was parked outside our house.

The contact owns a 1999 GMC Sierra 1500. When the contact attempted to stop the vehicle, the brake pedal extended to the floorboard. The contact shifted into second gear and was able to stop the vehicle. The contact inspected the vehicle and saw that the brake lines were corroded and separated. The contact called the manufacturer who stated that there were no related recalls. The contact planned to have the vehicle repaired. The current and failure mileages were approximately 30,000.

Upon applying the brakes on to a 1999 GMC sierra the brake line ruptured, spewing brake fluid onto pavement and causing near immediate loss of all stopping ability. The brakes were not applied with excessive pressure and the speed was less than 15 mph. Could there be a defect with the placing of the lines that causes these brake lines to rupture? upon checking with friends and the internet it has become apparent that this is not a rare occurrence with the GMC sierras/silverados. The repair was quoted at $1900 dollars to repair the ruptured brake line as well as other assorted brake parts. This vehicle has always seemed to have some type of problem with the brakes and for some reason it seems to be common knowledge within the automotive repair industry that this specific vehicle will develop problems with its brakes. If I were using any speed with this rupture occurred, I am sure the outcome would have been more serious.

The contact owns a 1999 GMC Sierra 1500. The contact stated that upon starting the vehicle, the brake warning light was illuminated. The vehicle was shut off and restarted several times yet the warning light remained illuminated. The vehicle was taken to an authorized dealer where the dealer advised the contact that brake fluid was leaking due to rust of the brake line. She stated that all of the brake lines were replaced by a local mechanic. The failure mileage was 94,542 and the current mileage was 94,636. Updated 12/30/10. Updated 04/07/11.

I used my truck Monday and Tuesday went to back out of my driveway and brake pedal went to the floor, nobody hurt ! I found that the brake lines had rusted out. Still waiting for repair and not sure I can afford it.

Applied brake at a stop light and the pedal went to the floor. The brake line above the drivers side rear wheel is all corroded and blew out. I've gotten a c quote of up to $1,200. The truck will sit until I can afford this repair.

The contact owns a 1999 GMC Sierra 1500. The contact stated that while braking from unknown speeds, the brakes would not engage. The contact had to utilize the emergency brake and proceeded up an incline to stop the vehicle. The vehicle was towed to the contacts residence. The contact stated the brake line exploded due to corrosion. The dealer advised the contact to bring the vehicle in for repairs. The manufacturer would not assist. The failure and current mileages were approximately 150,000.

I was parked in front of my home. I was getting ready to leave for work and I pressed the brake pedal down to start the truck and the brake pedal went to the floor. I had the window down so everytime I pressed the brake pedal I heard the pressure of the brake fluid being pushed out the broken brake line. It cost 350. 00 just to get repaired plus a tow. My mechanic said it was caused by the brake line being corroted. It was only one of the four brake lines on my truck but the mechanic said the other ones look pretty bad also and dont have the money to replace all of them.

Brake line let go when brakes were applied and fluid started to leak from under the drivers side under door/ truck is not operable since / currently waiting to be able to afford to have fixed as was advised that could cost up to 500 hundred dollars as all lines would need to be repaired as they all are corroded to point of more breakage.

1999. 5 GMC Sierra 1500 4wd ext cab, shortbed. May 2005 front brake line burst while applying brakes due to slowed traffic on 65mph interstate in upstate NY. Used shoulder to avoid hitting vehicles in front of me, however rear brakes only on a 6k pound pickup truck, unloaded, do not result in effective braking. I had to downshift my automatic to use engine braking as well as the parking brake (which also is poorly designed and ineffective). Truck was towed to gm dealer where front brake lines were replaced as all were rusted/rotted to unsafe levels, with one fracturing causing the loss of pressure and fluid. April 2009 upon doing an oil changed, myself, I discover the all of the brake lines, including the front as well as the rear are in very bad shape due to rust. After speaking to my mechanic I have learned that the gm brake like from the late 90s to 2004 were not properly designed to deal with the weather and resist corrosion. He said at least once a week he has to replace sections of gm brake line from these trucks and suvs. I cannot currently afford to replace these yet as its a $1700 job due to the labor involved and the fact that replacing with gm's brake lines will just rust again in 2-3 years. So I need aftermarket lines, probably stainless steel or at least something with a proper amount of nickel in it (which gm has skimped on!) which hopefully I can put on in the next few months before I get killed or someone else killed. April 2010.

The contact owns a 1999 GMC Sierra 1500 extended cab truck. The contact was braking from approximately 30 mph when the brake pedal abnormally fell into the floorboard. The contact had to downshift in order to get the vehicle to stop. The vehicle was taken to a local repair facility where the mechanic replaced three quarters of the brake line. The approximate failure mileage was 155,000 and the current mileage was 159,000. Updated 9/22/10 the consumer stated the brake lines had rusted. Updated 09/24/10.

Brake line failure due to extreme rust. After accident I checked several other trucks of the same vintage where I worked and all had similar problem.

As I was approaching a stoplight, my brake pedal went to the floor. I limped it around the corner and found a hole in a hard brake line. I had it repaired by a certified mechanic. Now a second rupture has occurred. This seems to be a result of corrosion.

Brakes failed due to brake line bursting because of corrosion on 1999 GMC truck.

Brake lines on a 99 GMC completely rusted through causing complete loss of braking ability.

While starting to drive away, applied brakes and could not stop. No warning able to stop vehicle and have towed to repair to a local gm dealer repair facility repaired section of rusted out brake line. Second incident occurred on August 2010 traveling approximately 35 mph. Applying brakes for a turn no brakes no warning, was able to avoid rear end collision by going straight and using emergency brake. Vehicle was towed to local repair center and had to replace 3 ft of brake line and again was a rusted out section of break line I am sending information because of the reports that this has been a ongoing problem for gm trucks.

Brake failure due to rusted brake line. A panic stop was attempted to avoid a merging vehicle. The brake pedal went to the floor when the line broke. I was able to avoid the vehicle the remaining fluid and slow speed stopped my vehicle. I have had other problems in the past with the brake pedal being soft and able to go to the floor. But it rebounded and stopped the truck. There is also abs quirks as well. Vehicle is a 1999 GMC sierra extended cab 3 door 4x4 5. 3l 78,000 miles. I found the leak it was inside the frame under the drivers door in a cluster of brake lines attaching to the abs pump. All of the brake lines in the area were seriously rusted and have to be replaced. The lines aprox. 1 foot from the abs pump are in good shape. The brake lines seem to be rusted however the frame, underbody floor and other equipment located in the same area are not showing a rust problem. This rust problem should be checked and inspected regularly. I think a stainless steel or other rust resistant material should used in this location.

Brake line running along frame to rear wheels ruptured when shifting from park to drive. Shift interlock requires brake depressed to shift from park to drive. Brake lines running from firewall to rear of vehicle along inside of frame rail are corroded and soft so badly as to need replacing. Like vehicle in shop for identical issue. When brake line ruptured, there are no brakes on vehicle at all due to a single reservoir vice twin reservoirs on most vehicles to separate front and rear brake systems. Brake line possibly made of material unsuitable for long term usage. Brakes lines also are place in an area that will collect corrosive material from roadway from vehicle tires. No crash, but $600 required in repairs. If moving when brake line ruptured, there is high probability of severe crash.

The contact owns a 1999 GMC Sierra 1500. While driving approximately 45 mph the contact applied the brakes and the left front and right rear wheel exploded. He stated that the brake pedal extended to the floor. He carefully drove the vehicle to his residence. The vehicle was towed to the mechanic where it was purchased. The mechanic replaced the both brake lines to the master cylinder and the abs unit. The failure mileage was 79,686 and the current mileage was 80,058. Updated 08/27/10. Updated 08/30/jb.

The contact owns a 1999 GMC Sierra 1500. While driving 40 mph, the vehicle failed to stop when the brakes were depressed. The vehicle came to a stop approximately 200 feet after the brakes were applied. The mechanic stated that the front brake lines were rusted and he replaced the brake lines. There have been no other failures since the repair. The failure mileage was 16,850 and current mileage was 16,900.

: the contact stated while driving 25 mph, the brake pedal was mushy when depressed, and the stopping distance was extended. This was accompanied by a clacking noise in the front end. Upon inspection, it was noted that brake fluid was leaking from the underside of the vehicle below the driver's seat. The vehicle was not seen by a dealer for this incident, however the vehicle had previously been taken to a private repair shop, where they noted that the caliper fittings around the brake shoes were corroded. The brake line fittings were replaced, which corrected the corrosion. The manufacturer was also notified. There was a NHTSA recall# 00v345000, which pertains to the piping and fittings on the service brakes. The vehicle was not included in the recall due to the VIN.

Fax from (FL) re defective brakes on his 1999 GMC Sierra 1500 pickup truck, ES has no record of previous ltr. The steel brake line tube to the front brakes ruptured.