Tank Mounting problems of the 2003 Chevrolet Silverado 1500

My wife was driving our 2003 Chevrolet silverado 4x4 pickup on secondary state route. While descending an approximate 6% grade into a right hand turn at bottom she depressed the brake pedal to slow for the grade and turn and it went to the floor, the service brake message came up in the dic and the door chime sounded. She pulled over as soon as possible as she was shaken from riding out that hill and turn with minimal brakes and called me. I went out and drove the truck back to our home and put in the garage to inspect the problem. Once under the truck I found brake fluid dripping from the side of the fuel tank and frame area under the cab and bed of the truck. The service brake line from the abs block to the rear frame point where the brake hose to the rear axle mounts was corroded through and leaking. Further inspection showed all brake hard line plumbing to be in poor condition and also the fuel lines showing high corrosion. A call to a local gm parts counter revealed that gm does not make a replacement set for these lines and that a technician would need to field bend and make up each line. Later research proved this to be wrong as gm offers a deeply discounted unadvertised line set from ac delco. In researching finding parts to repair, I have found this to be a common problem with Chevrolet/GMC trucks from about 1999 up according to the various truck owner forums online. Driving the vehicle home at slow speed, braking was very minimal with the rear brake circuit out,and the knowledge of poor brake operation, so therefore it is my opinion that this is a safety issue with these vehicles with the potential of injury or even death when all the factors combine poorly, and at the least, gm should be required to notify owners of this potential problem with their vehicle, if not recall and repair those effected vehicles.