DURING MAJOR SNOW FALL AFTER NEW YEAR 2014, UPON ARRIVING HOME FROM WORK, WITH MY WIFE AND ANOTHER PASSENGER, I ATTEMPTED TO STOP AND MY BRAKE PEDAL SUNK TO THE FLOOR, NOTHING, NO BRAKES. I NEARLY DROVE THROUGH GARAGE DOOR. I HAD TO CUT THE WHEEL AND PUNCH THE GAS TO PERFORM A "HALF DOUGHNUT" TO AVOID HITTING MY HOUSE. HAD THERE NOT BEEN SIGNIFIGANT SNOW ON THE GROUND, THIS MANEUVER WOULD HAVE BEEN IMPOSSIBLE. THE FOLLOWING DAY WHILE NAVIGATING VEHICLE INTO GARAGE, WE HAD AN INCIDENT , CAUSING MINOR DAMAGE TO TRUCK & GARAGE. UPON INSPECTION, I DISCOVERED THE STEEL BRAKE LINES WERE EXTREMELY FRAGILE DO TO RUST. 2 LINES FROM PROPORTIONING VALVE TO ABS UNIT, & 2 LINES FROM ABS UNIT TO FRONT WHEELS DETERIORATED UNDER BODY NEAR CHASIS. ONE OF THE LINES FROM PROP VALVE TO ABS FAILED, LEAKING BRAKE FLUID. I WENT TO ABELOFF GMC WHERE I WAS INFORMED ONLY LINES FROM PROP VALVE TO ABS WHERE AVAILABLE. I PURCHASED AND CHANGED THEM. HOWEVER, AS I SUSPECTED THE FRONT LINES WOULD LEAK DUE TO THE FACT THEY WOULD BE DISTURBED WHILE CHANGING PROP V. TO ABS LINES. THEY FAILED BEFORE I GOT THE TRUCK OUT OF THE GARAGE, CAUSING A MINOR ACCIDENT IN GARAGE . I THEN FOUND A COMPANY ONLINE, CLASSIC TUBE, WHICH PROVIDED ME WITH A KIT CONTAINING ALL BRAKE LINES MADE FROM STAINLESS STEEL. SO, NOT ONLY COULD WE HAVE QUITE POSSIBLY BEEN KILLED, BUT I NOW HAVE [2] EXTRA BRAKE LINES THAT COST ME $125.00 THAT I DON'T NEED. GM COULD AT LEAST HAD THE DECENCY TO MAKE ALL THE LINES AVAILEABLE. I ALSO DISCOVERED T