TWO YEARS AGO I HAD A SEVER ACCIDENT THAT CAUSE ME TO HIT ANOTHER CAR AND SPIN AROUND. THE GMC DEALER SAID THE CAUSE WAS RUSTED OUT BRAKE LINES. TODAY IT HAPPENED, BUT I WAS LUCK ENOUGH TO BE JUST PULLING INTO MY PARKING SPOT WHEN IT HAPPENED. THE BRAKE LINE MUST HAVE RUSTED OUT AGAIN BECAUSE I PUMPED THE BRAKE AND NOTICED IT COMING OUT OF THE LEFT REAR LINE. THIS IS VERY DANGEROUS BECAUSE IT WILL LIKELY ONLY HAPPEN WHEN YOU ARE IN AN EMERGENCY SITUATION. THERE IS NO PRE WARNING. IT WILL JUST HAPPEN. PERHAPS THEY ARE MAKING THE BRAKE LINES OUT OF THINNER MATERIAL BECAUSE WE HAVE MANY VEHICLES MUCH OLDER, AND NEVER HAD THIS PROBLEM.