2012 Nissan Armada Brakes

VERY LIGHT BRAKE PEDAL, PEDAL GOES ALL THE WAY TO THE FLOOR BEFORE THE TRUCK STARTS TO SLOW DOWN. THE BRAKE AND VDC LIGHTS COME AND THE BRAKES SKIP AND TRUCK SLIDES. TOOK TO NISSAN DEALERSHIP THEY SAID IT WAS MY BRAKE BOOSTER AND MASTER CYLINDER CAUSING THE ISSUE, I HAD ITEMS REPLACED AND THE PROBLEM IS STILL THERE.

ON OR ABOUT 1/14/2015 I PULLED INTO MY MOTHER'S DRIVEWAY TO DROP OFF MY CHILD FOR DAYCARE. I PUT MY VEHICLE IN PARK, APPLIED THE EMERGENCY BRAKE BECAUSE THE DRIVEWAY SITS UP HIGH, AND TURNED OFF THE ARMADA. UPON EXITING MY MOTHER'S HOUSE I OBSERVED MY VEHICLE ROLLING OFF THE DRIVEWAY ON IT'S OWN. IT DIDN'T STOP UNTIL IT HIT THE CURB ACROSS THE STREET. THIS COULD HAVE LEAD TO A CRASH OR WORSE IF I HAD BEEN UNLOADING MY CHILD FROM HIS CARSEAT WHEN THE INCIDENT OCCURRED. I HATE TO THINK WHAT WOULD HAVE OCCURRED IF ONE OF MY OTHER CHILDREN WAS STANDING BEHIND THE VEHICLE WHEN THE VEHICLE ROLLED OFF THE DRIVEWAY. *TR