Two problems related to brake master cylinder have been reported for the 2001 Chevrolet 2500. The most recently reported issues are listed below.
While helping my son move to remove furniture from flooded illinois river home the truck I have owned since new lost brakes . Upon inspection I found the brake line going from the proportionate valve to the rear drivers side brakes had rusted through and had failed. Myself and my son replaced the line and tried to bleed brakes with partial success , could not get one bleeder loose but got vehicle functioning to get it to my home to continue working on it further. Had to replace front caliper , and upon trying to further bleed brakes another line going from the front master cylinder to the rear proportionate valve was also leaking, upon further inspection I decided both lines were rusted and needed to be replaced. This vehicle only has 67000 miles and the brake lines should not fail that quickly. All brake lines on truck are rusted and general motors has a very serious safety problem. This is going to be an expensive fix if I have to replace all lines , it has already cost me a lot and I did all the work so far.
Brake line ruptured while pulling trailer resulting in an accident. Brake line that failed was between the master cylinder and the abs box.