Problems with 2004 GMC Sierra 2500 SERVICE BRAKES, HYDRAULIC

Both front hydraulic brake lines corroded on drivers side, with loss of braking, on chassis top rear of front wheel. it appears that there is a large wiring loom (1 1/2" o.d.) clipped on top of hydraulic lines, one to lf and rf wheels. corrosion on both lines are at the contact of the loom and lines. vibration may have caused the loom and lines to rub and allowed moisture to corrode the brake lines. *tr

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. *tt

Tl*the contact owns a 2004 gmc sierra 2500. while the contact attempted to move the vehicle, the brakes failed. he inspected the vehicle and found a leak, and noticed that the brake lines were corroded and leaking brake fluid. the vehicle was towed to the dealership who stated that the main brake lines were also corroded. the vehicle was repaired. the manufacturer will be contacted. the failure and current mileages were 50,000. updated 03/16/11*jb

Dt: the contact stated when applying brake pressure at 5 mph or less there was a loss of power steering. when brake pressure was released, the power steering returned. he took the vehicle to the dealer, who stated the same pump activated the power steering and the power assist brakes;. he replaced a valve on the pump. the problem persisted, and he returned to the dealer. the dealer performed a diagnostic test that produced normal codes. there was technical service bulletin pit3310 , and the contact felt this was related to the ongoing problem. no further repairs have been made. *ak