Brake Fluid Leak problems of the 2004 GMC Sierra 2500

Brake lines rusted through. All brake fluid leaked out. No brake system including emergency brake failed. Had to stop vehicle against curb system.

Leaving work I pulled out from the parking lot and drove about 500 yards. Went to apply brakes and pedal went to the floor. I was able to make it back to my work parking lot and stopped the truck. Noticed that brake fluid was pouring from under the truck in two places. One leak was under the drivers area and the other was in front of the left rear wheel. The place I work has a car lift. Put the truck on the lift and the brake lines were rusted through. The truck has enormous amounts of rust on the frame, suspension, and axles. This truck is not my daily driver. I do not live near the ocean nor do I push snow with it. I have never seen brake lines rust out like this. Gm stated that I had to take it to a dealer for inspection. After reading up on the topic I know gm won't do anything about the lines. I already ordered stainless steel brake lines for the truck and will install them. Hopefully gm will reimburse owner for this expense.

I own a 2004 GMC Sierra 2500hd 4wd truck. It has 90,500 miles on it. Multiple brake lines under the driver side door have rusted and are leaking brake fluid. The vehicle is unsafe to drive at this point unless repairs are made costing me over $1000. I cannot drive the truck until repairs are made. It appears after doing some online reseach that there is already a NHTSA investigation concerning premature brake line rusting/failure on gm trucks. I have driven cars that are over 30 years old and they do not have the kind of rust I have on my GMC sierra that is only 7 years old!!! please make gm do a recall on this design failure. They are endangering the lives of their customers!.

While towing 4000# boat, approached traffic signal and applied brakes while moving at approx 10 mph, the brakes applied and the pedal then bottomed out on the floor. The vehicle veered left and came to a stop after much continued braking effort. The vehicle was driven off the highway at the first safe intersection and examined. Inspection under the drivers side of the frame revealed rusted through steel brake line from master cylinder and leaking brake fluid onto the street. Vehicle and boat were towed, later inspection revealed four of five steel brake lines at the proportioning valve were rusted to point that replacement was necessary.

Wife and child driving truck, brake pedal wnt to the floor and service brake indicator came on while on interstate. Stopped at a gas station and filled master cylinder reservoir with fluid. Drove vehicle 8 more miles and traded with me, when I got to the vehicle, I found brake fluid leaking onto ground, found lines corroded beyond belief on driver side frame around wheel well. Drove truck home using emergency brake, low speed, and down shifting. No repairs have been performed due to strong belief this is a manufacturer defect.

Lost brakes while driving 35 mph was able to stop and noticed brake fluid dripping from above gas tank just forward of rear axle on drivers side. New brake line was installed at GMC dealer in July 2010 after it burst going 45 mph same problem as in July 2010 that caused an accident with property damage to my vehicle and others property after sudden complete brake failure. New line is severely corroded at each green plastic clip after only 7 months.

When coming to a stop the pedal went to floor and had no brakes. Luckily I was able to swerve and miss the vehicle in from of me. But had to run through the four way stop and was blessed to have no other vehicles in way. The brake fluid was leaking from under the driver side about where the seat is. Upon investigation, the lines are all corroded and rusting. Obviously it only takes one to leak but all need to be replaced. This is such a surprise because this truck sits in the garage most of the time and has very few miles on it.