MANUFACTURER RECALL NUMBERN192268490 NHTSA RECALL NUMBER19V645 ON AUGUST 14, 2014, I WAS DRIVING THE 2017 CHEVY SILVERADO 4X4 WORK TRUCK ON A RURAL STATE ROUTE IN HOLMES COUNTY, OHIO. I HAD PULLED OFF ON THE SIDE OF THE ROAD TO PICK UP MY TRAFFIC COUNTING EQUIPMENT. ONCE I WAS FINISHED, I PULLED INTO A DRIVEWAY TO TURN AROUND. I BEGAN TO BACK OUT OF THE DRIVE WHEN THE BRAKE PEDAL WENT ROCK HARD, I LOST ALL PEDAL AND HAD NO BRAKES. I HIT THE GUARDRAIL THAT WAS DIRECTLY BEHIND ME WHEN I COULDN'T STOP. NO DAMAGE TO THE GUARDRAIL, BUT PLENTY OF DAMAGE TO MY TRUCK. OBVIOUSLY, I DIDN'T THINK THIS WAS RIGHT SO THE VERY NEXT DAY I TOOK THE TRUCK TO PROGRESSIVE CHEVROLET. AFTER TECHS HAD A CHANCE TO LOOK OVER THE VEHICLE, THEY SAID THE VACUUM PUMP WAS DEFECTIVE AND IT WAS REPLACED AT NO COST TO ME. THAT'S ALL WELL AND GOOD, BUT HAD THE VACUUM PUMP NOT FAILED, I WOULD NOT HAVE HIT THE GUARDRAIL.