One problem related to brake hoses, lines/piping, and fittings has been reported for the 2003 Chevrolet 3500. The most recently reported issues are listed below.
Wife was comming home from work at night went to stop and lost brakes. I got it back home and inspected it and found that it blew a rear and fornt brake line. The brake lines were rotted so bad we replaced them all. Upon replaceing brake lines I noticed that fuel lines were also rotted severly and one was wet with diesel. The truck is used everyday and doesnt sit. These lines should not rot this bad this fast. Some thing gm should address before someone gets killed. Thank you.