Two problems related to brake master cylinder have been reported for the 1999 Chevrolet Silverado 2500. The most recently reported issues are listed below.
Noticed brake pedal dropping to floor thought master cylinder was bad after mechanic checked vehicle had to replace all brake lines at the cost of $ 500. 00.
I was traveling down a steep hill on dry pavement and my vehicle was picking up speed so I applied the brakes and the pedal went straight to the floor. I started frantically pumping the brakes as I noticed the crossing guard going down on the train tracks at the bottom of the hill and still no brakes at all. . . After realizing I was completely without any brake pedal I immediately downshifted to 1st gear which slowed the vehicle down and I remembered the emergency brake and I then jammed the emergency brake pedal to the floor which stopped me 20 ft from hitting the side of a cargo train. . . As a guy who repairs mechanical systems for a living I was totally floored that the brake system could fail totally,. . . . I then took my truck to my mechanic who said the brake lines were totally rusted out and that both front brake lines had blown large holes between the master cylinder and the abs module and he told me I was lucky that my truck was not running very long before blowing the line as it could have started a fire as the brake fluid was spraying directly on the exhaust manifold. . . He recommended changing every brake line on my truck as all were severely rusted out and that it will happen again. . . He also informed me that I should check if there was a brake recall on this vehicle as he said this excess corrosion was a common problem on my model and year truck and he read last year that they were investigating it as severe safety hazard of multiple brake lines failing at once. . . My comment on this after reading many online complaints is that someone is not doing their job and they might want to warn people before someone dies. . .