THE BRAKES FAILED IN MY CAR CAUSING A REAR COLLISION WITH AN OBJECT IN MY DRIVEWAY. AFTER INSPECTION FROM A CERTIFIED GMC DEALERSHIP, THE BRAKE FAILURE WAS NOT CAUSED BY SERVICE NEGLECT OR AGE OF BRAKES, IT WAS DUE TO THE VACCUM PUMP FAILURE TO PROVIDE PRESSURE. THIS IS THE SECOND TIME IN TWO YEARS THIS PART HAS CAUSED MY BRAKES TO FAIL. THE DEALERSHIP REPLACED THE PART AT NO COST THOUGH THERE IS NOT FORMAL RECALL ON THIS PART. BOTH TIMES THIS PART FAILED THE CAR WAS IN MOTION. THE FIRST TIME IT WAS TOWED OUT OF A CITY TO BE REPAIRED AS IT WAS DANGERSOUS TO DRIVE AND THE SECOND TIME THE FAILURE CAUSED THE VEHICLE TO COLLIDE WITH A LARGE DUMPSTER IN MY DRIVEWAY CAUSING EXTENSIVE DAMAGE TO THE REAR PASSENGER SIDE OF THE CAR. THANKFULLY THERE WAS NOT PHYSICAL DAMAGE TO ANY PERSONS IN EITHER OF THESE TWO INCIDENTS WHICH BOTH WERE NO FAULT OF THE DRIVER OR OWNER OF THE CAR.