ON MAY 9, 2014 I WAS BACKING UP TO HOOK UP TO A TRAILER WITH MY TRUCK. WITH ABSOLUTELY NO WARNING SIGN OR INDICATION, MY BRAKE LINE BUSTED AND I HAD NO BRAKES WHATSOEVER. THE PEDAL WENT ALL THE WAY TO THE FLOOR. EVEN AT THIS SLOW OF SPEED IN REVERSE I COULD NOT STOP AND RAN DIRECTLY INTO THE TRAILER. MY WIFE WAS STANDING AT THE TRAILER DIRECTING ME AND LUCKILY DID NOT GET HURT BECAUSE OF THIS BRAKE FAILURE. I HAD TO USE THE EMERGENCY BRAKE TO GET STOPPED, AND EVEN THAT WAS VERY SLUGGISH TO STOP THE TRUCK. I AM NOW FINDING OUT THAT THIS IS COMMON ISSUE WITH THESE VEHICLE AND THERE IS AN OPEN INVESTIGATION INTO THIS MATTER. GM NEEDS TO DO SOMETHING ABOUT THIS AS THE IMMEDIATE FAILURE OF THE BRAKES WITH NO WARNING IS SURE TO CAUSE SERIOUS INJURY OR DEATH SHOULD IT HAPPEN WHILE DRIVING DOWN THE ROAD. *JS