Brake Master Cylinder problems of the 2004 Chevrolet Silverado 2500

Brakes failed under hard stop (highway, in motion) to avoid a collision with deer. Master cylinder to abs module steel brake line failed in a mode of rupture due to corrosion. All other steel lines were corroded and contacted gm. 2 other silverado line vehicles owned also failed this year due to corrosion. Gm response was that no recall existed. Replaced all steel brake lines in vehicle with stainless aftermarket lines. After multiple contacts with gm customer service, I was told to save my receipts for repairs. This is an incorrect material specification, latent defect and gm needs to be held accountable. 3 vehicles that I own with the same repair in 8 months. Inexcusable!.

I got in the truck to leave my house. After starting the truck and putting my foot on the brake pedal I shifted into reverse to leave my driveway. At that time the brake pedal went all the way to the floor. I was able to shift back to park as I had not release the parking brake yet. I opened the hood and the master cylinder was empty. After looking under the truck, drivers side inside frame rail, I discovered a burst brake line where it leads into the abs module. All of the brake lines were extremely corroded and had to be replaced with stainless steel at a chevy dealer. I had the dealer perform other routine maintenance items at that time as well. They discovered that I needed to replace a chain guide in my transfer case, and repair a hole that the loose chain had caused. I find it hard to believe that chevy used stainless steel for the exhaust system, which looks great after almost 10 years, yet they used plain steel for the brake lines. I was lucky this occurred in my driveway, and not while I was towing my boat on the highway. The transfer case problem also seems like an engineering failure.

While driving at slow speed in a very congested area, the brake pedal suddenly got very soft and went all the way to the floor. Braking became extremely limited. With the drivers window open there was the smell of brake fluid. If this failure had occurred 5 minutes earlier while braking from highway speed it would have certainly resulted in a serious accident. Once stopped, a trail of brake fluid was apparent and a puddle had formed on the ground under where the driver sits. Closer inspection showed one of the brake lines that runs from the master cylinder on the firewall to the abs control unit mounted to the inside of the frame rail on the driver's side had ruptured. This brake line, as well as the adjacent line to the abs controller, and the line from the abs controller to the rear axle showed signs of severe corrosion. The surface was red and large chunks of corroded brake line material were falling off. The abs controller, fuel lines in the area, and the frame rail itself showed very limited signs of corrosion typical of a 7 year old vehicle in a salt belt state. 8 months prior the vehicle was serviced by the dealer it was purchased and a report was submitted stating the brake lines were in good condition.

While pulling up to a drive up window at a food store, the brakes went all the way to the floor. I heard the pressure releasing underneath. Discovered that the left side brake line from the master cylinder to the abs module had burst from rusting through. There is heavy rust on sections of all of the lines. Luckily, I was only going very slowly when is burst.

A brake line burst during testing after the master cylinder failed and was replaced. The tech said all lines were badly corroded and need to be replaced. The master cylinder failed in heavy traffic at freeway speed and would have caused a serious accident if weren't for the brakes on the trailer I was pulling.

When coming to a stop sign with my 2004 chevy pickup the brake pedal went to the floor, but I was able to stop. After getting out I saw brake fluid coming down at about the drivers door along the frame. I took it to a garage to be repaired and was told that I need new brake lines. Especially the ones from the master cylinder and the front brakes to the abs controller. Were these lines meet the frame there is a plastic clip and at that point the lines were rotted. At this time all the brake lines need to be replaced. Also in the pass I had to replace all the rotors on the truck because they were rotten. This is the first time I ever seen a rotor that was rotten.

The contact owns a 2004 Chevrolet Silverado 2500 hd. While driving 60 mph, the brake pedal extended to the floor when depressed. As of September 10, 2007, the dealer had not inspected the vehicle. The failure and current mileages were 24,194. *updated 12/12/2007 the consumer stated replaced the master cylinder fix problem. Updated 12/12/07.