Brake Master Cylinder problems of the 1999 Chevrolet Silverado

The contact owns a 1999 Chevrolet Silverado. The contact stated that while driving approximately 28 mph and approaching a red light, the vehicle would not stop or slow down when applying the brakes. The contact stated that the vehicle drove through a busy intersection nearly crashing into two oncoming vehicles. The contact was able to stop the vehicle by shifting into park. The contact inspected the vehicle and found that the brake lines under were corroded. The vehicle was not diagnosed by a dealer. The manufacturer was notified and no solution was offered. The failure mileage was 107,000. Updated 2/27/cn the consumer stated the main front and back brake system lines coming from the master cylinder were corroded and had ruptured. The consumer indicated that the car had been garage kept and was in great condition. The vehicle was repaired. The consumer saved all removed lines for investigation.

Had to replace brake lines all the way to master cylinder and fuel lines from extensive corrosion also throughout the frame and mounting brackets for shocks and leaf springs. Abnormal rust for any vehicle that was washed and taken care of accordingly.

Complete and total brake failure, without warning, from burst brake lines caused by rust in the lines from master cylinder to the junction box under driver's seat. I had this problem previously in the brake line from junction box to passenger front wheel two years ago. The previous rupture was in the same area, but not the same spot as this failure. I have kept visual checks for extensive rust on the other lines since then. However this new failure was where the line went through the cab to the frame, out of clear sight and behind inner fender liner. I had backed vehicle and a trailer down boat ramp to recover ski boat. Vehicle stopped normally at water edge and boat was loaded. Upon applying brakes to take vehicle from park to drive, brake pedal went completely to floorboard. I drove vehicle and boat up the ramp slowly into parking lot where I attempted to stop on flat ground. Vehicle rolled to a stop with brake pedal completely on floor. In order to get home, I removed fender liner and made emergency repairs with store bought brake lines and splice connectors. Only the line from the firewall side of the master cylinder originally failed, however in attempting to remove that broken line, the front line also had extensive rust and also started leaking. The break in the second line was within an inch of the other break. It appears the driver's side front wheel throws water, salt and debris on all lines where they run down frame through body cavity and along frame rails. Most extensive rust is located in plastic clips that stabilize brake lines to the frame. Brake lines are vital safety features, not wear items and should not fail for the life of the vehicle, in my opinion.

After stopping hard due to traffic, the brakes lost almost all pressure. Stopping distance increased greatly while pedal went to the floor without much resistance. Upon returning home, albeit slowly, it was discovered that there was a small leak just after the master cylinder in the steel brake lines where they enter a plastic retaining clip. All of the surrounding steel lines have corrosion on them as well.

While driving and appying the brakes vehicle will not stop. Took vehicle to dealer on the 12th of April, 2000. They replaced master cylinder/booster, and and abs brakes. But, problem still occurs.