WHILE DRIVING AT A SPEED OF APPROXIMATELY 20 MILES AND HOUR I HAD A COMPLETE FAILURE OF THE BRAKE SYSTEM, WHIT THE BRAKE PEDAL GOING COMPLETELY TO THE FLOOR. THIS CAUSED ME TO HAVE AN ACCIDENT AND I REAR ENDED ANOTHER PICKUP TRUCK AND WAS ONLY ABLE TO STOP THE CAR BY APPLYING THEW EMERGENCY RAKEAKE. INSPECTION BY THE INSURANCE ADJUSTER AND THE BODY SHOP SHOWED THE BRAKE LINES COMPLETELY RUSTED OUT. THE TRUCK PASSED STATE INSPECTION THE DAY BEFORE. AN INTERNET SEARCH SHOW THAT THIS WAS A SAFETY PROBLEM (RUSTING) WHICH GM CONVINCED THE NHSTA WAS NOT A DEFECT AND DID NOT NEED A RECALL. THE LEAST THAT SHOULD HAVE BEEN DONE WAS THAT OWNERS SDHOULD HAVE BEEN INFORMED. ALSO CONTRARY TOI WHAT GM SAYS IT RESULTED IN COMPLETE BRAKE LOSS...NOT PARTIAL.