2015 GMC Sierra 1500 Brakes

BREAK PEDAL AT LOW SPEEDS LOCKS UP COMPLETELY.

BRAKE VACUUM PUMP. AT SLOW SPEEDS MY BRAKES ALMOST DON'T SEEM TO WORK. I'M SURE IT'S THE SAME PROBLEM I'VE READ ABOUT.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE BACKING OUT OF A PARKING SPACE, THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT THE VEHICLE DID NOT STOP. AS A RESULT, THE CONTACT STRUCK A PARKED VEHICLE. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DETERMINED THAT THE BRAKE VACUUM PUMP WAS DAMAGED AND NEEDED REPLACEMENT. THE DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 48,499.

BRAKES FAILED TO RESER AT LOW SPEEDS, RESULTING IN NEAR COLLISION. BRAKE PEDAL BECAME STIFF AND UNRESPONSIVE. HAS ALSO HAPPENED PREVIOUSLY, WAS TOLD BRAKE VACUUM PUMP FAILURE IS THE CAUSE. WAS NOTIFIED THIS DOES NOT QUALIFY UNDER VEHICLE WARRANTY DESPITE READING OF MULTIPLE REPORTS OF FAILURE, TECHNICAL BULLETIN RELEASE, AND IMMEDIATE SAFETY ISSUES.

VEHICLE'S BRAKES BECOME STIFF AT LOW RPM CAUSING DIFFICULTIES STOPPING.

BACKING UP THE TRUCK THE BRAKE PEDAL BECAME HARD AND THE TRUCK WOULD NOT STOP LIKE I LOST POWER I ALMOST HIT MY DOG AND THE GARAGE IT WAS VERY SCARY

ON SEVERAL OCCASIONS SLOW DRIVING IN PARKING LOTS I HAVE LOST POWER ASSIST BRAKING AND ALMOST HIT A CAR PARKED IN THE SPOT IN FRONT OF ME. I HAVE READ ONLINE ABOUT THE ISSUE WITH THE BRAKE VACUUM PUMP AND AM THINKING THAT IS MY ISSUE. MY BRAKE PEDAL AFTER A FEW PUMPS WILL GET SUPER STIFF. ON EVERY OCCASION THAT THIS HAPPENED IT WAS SLOW MOVING ADJUSTING INTO A PARKING SPOT AND HAD PUMPED THE BRAKES SEVERAL TIMES. THE PEDAL THEN BECOMES STILL AND PUSHING THE BRAKE PEDAL DOES NOT GET THE BRAKING POWER AS EXPECTED.

WHILE DRIVING AT SLOW SPEEDS IF YOU TAP THE BRAKE PEDAL IT WON'T DEPRESS AND THE TRUCK WILL KEEP ROLLING. THIS HAPPENS WHEN I'M TRYING TO PARK USUALLY. I WAS BACKING IN MY DRIVEWAY AND IT DIDN'T STOP AFTER TAPING THE BRAKE PEDAL 3 TIMES. I HIT THE TELEPHONE POLE WITH REAR BUMPER WHICH BENT THE BODY OF THE LEFT REAR FENDER ENOUGH TO CAUSE THE TAILGATE TO NOT OPEN. MY GMC DEALER REPLACED THE FAULTY BOOSTER PUMP FOR $1029.35 AND I HAD TO RENT A CAR FOR 2 DAYS.

BRAKE VACUUM PUMP BOOSTER. FIRST STARTED WHEN DRIVING UNDER 5 MPH. THE BRAKES WERE HARD TO PUSH DOWN AND WOULD NOT STOP THE TRUCK PROPERLY. DID THIS FOR APPROXIMATELY 3 MONTHS. THEN DRIVING GETTING OFF THE INTERSTATE AND APPLIED BRAKES GOING 60 MPH THE BRAKES WOULD NOT WORK. COULD BARLEY STOP. SAME ISSUE HAS WHEN DRIVING SLOW. NOW THE BRAKES WILL NOT WORK AT ANY SPEED. THEY TRUCK IS UNDRIVABLE UNTIL IT GETS FIXED.

BRAKE PEDAL STIFF/HARD WHEN APPLYING BREAKS. PROBLEM OCCURS PERIODICALLY WITHIN THE CITY AND HIGHWAY.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING AT LOW SPEEDS OR WHEN THE GEAR SELECTOR WAS IN REVERSE, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD. THE CONTACT MENTIONED THAT THE FAILURE OCCURRED PERIODICALLY. THE VEHICLE WAS TAKEN TO EVERETT BUICK GMC (21115 I-30 FRONTAGE RD, BRYANT, AR 72022, (501) 303-4393) TO BE DIAGNOSED, BUT NO FAILURE WAS FOUND. THE DEALER STATED THAT THE BRAKES WERE "PERFECT". THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VIN WAS NOT PROVIDED. THE FAILURE MILEAGE WAS 45,000.

BRAKES COMPLETELY FAILED. REPLACED BRAKES ON ALL 4 WHEELS, BUT TO NO AVAIL. THEN REPLACED THE MASTER CYLINDER AND STILL NO BRAKES. MY FENCE POLE AND MAILBOX STOPPED MY VEHICLE.

HARD BRAKE PEDAL WITH INCREASED EFFORT NEEDED TO DEPRESS THE BRAKE PEDAL. FEELS LIKE TRUCK WILL NOT STOP. HAD TO HAVE TRUCK TOWED. REPORTED BACK ON 11-24-18 TO NHTSA: ( #1115347). BRAKE VACUUM PUMP WAS REPLACED @ GM DEALER ON 11-14-18, SAME SITUATION HAPPENED AGAIN ON 02-19-19. GM TSB # PIT5361D NEEDS TO BE A RECALL.

I PUSHED ON THE BRAKES WHEN SLOWLY PULLING INTO A PARKING SPOT AND THE BRAKES GOT SQUISHY AND BARELY STOPPED BEFORE I HIT ANOTHER PARKED CAR. THIS HAPPENED A FEW TIMES BEFORE I GOT THE VEHICLE HOME. THEN A MESSAGE POPPED UP THAT SAID "SERVICE BRAKE ASSIST SYSTEM". I TOOK THE TRUCK IN AND THEY SAID THEY WOULD NEED TO REPLACE THE VACUUM PUMP AND 2 BELTS.

2015 GMC SIERRA DENALI. CONSUMER WRITES IN REGARDS TO BRAKE PEDAL PIVOT BOLT SENSOR FAILURE. *LD *JS

WHEN THE TRUCK'S VACUUM PUMP FAILS, THE BRAKE PEDAL BECOMES VERY HARD TO PUSH. THE TRUCK DOES NOT STOP AT LOW SPEED WHEN THIS HAPPENS. THE FIRST TIME THIS HAPPENED, I WAS BACKING INTO A PARKING SPACE AT CHRISTMAS TREE STAND. I NEARLY BACKED INTO THE TENT AND PERSONS LOADING THE CHRISTMAS TREE IN THE TRUCK. THE SECOND TIME THIS HAPPENED, I WAS PARKING MY TRUCK IN DRIVEWAY. I ROLLED ABOUT 6' TO 8' BEFORE STOPPING. I NEARLY HIT MY HOUSE. GM ISSUES A "SPECIAL WARRANTY" BUT THEY REFUSE TO COVER THE REPAIRS BECAUSE OF THE VEHICLE MILEAGE. THIS SAME ISSUE IS WELL DOCUMENTED BY OTHER GM TRUCK OWNERS FOR 2014 TO 2018 MODEL YEARS.

BRAKES DO NOT WORK WHEN IN REVERSE OR AT LOW SPEEDS. PROBLEM WAS THERE THE DAY I PURCHASED THE VEHICLE. A COUPLE WEEKS AFTER PURCHASE I BACKED INTO VEHICLE IN A PARKING LOT. I WAS TOLD IT WAS "NORMAL" AFTER ALMOST HAVING A WRECK I DID SOME RESEARCH. HOW IS THIS NOT NATIONALLY ADVERTISED AS A RECALL YET? THIS IS A HUGE SAFETY NEGLIGENCE ON GMC'S PART. THE VACUUM PUMP IS KNOWN TO FAIL BY EVERY DEALER I HAVE CALLED. ALSO EVERYONE I KNOW WHO HAS THE SAME MODEL TRUCK ALSO LIVES WITH THIS PROBLEM.

BRAKE PEDAL BECOMES HARD AND NON EFECTIVE WHEN ATTEMPTING TO PARK OR AT LOW IDLE SPEEDS ON NUMEROUS OCCASIONS NEARLY CAUSING SERIOUS HARM TO BYSTANDERS AND PROPERTY. THIS IS A MAJOR PROBLEM WITH GM TRUCKS AND DO NOT KNOW WHY A RECALL HAS NOT BEEN ISSUED TO PROTECT THE PUBLIC FROM SERIOUS INJURY.

AT LOW SPEEDS BREAKING BECOMES EXTREMELY DIFFICULT LEADING TO LONGER STOPPING DISTANCE.

I WAS DRIVING DOWN A HILL AT ABOUT 15 MILES AN HOUR AND WHEN I WENT TO PRESS THE BRAKE PEDAL I HEARD A NOISE AND THE BRAKE PEDAL WENT TO THE FLOOR AND TRUCK WOULD NOT STOP. I HAD TO SWERVE OFF THE ROAD TO AVOID A COLLISION. AFTER, THE BRAKE PRESSURE RETURNED WHILE DRIVING, BUT WHEN STOPPED IT WOULD LOSE PEDAL FEEL AND GO BACK TO THE FLOOR. AFTER READING ARTICLES IT WAS OBVIOUS THE VACUUM PUMP WAS FAILING. I LIMPED THE TRUCK HOME AND TOOK IT TO THE DEALERSHIP AND AM WAITING TO HEAR BACK.

BRAKES FADE AT LOW SPEEDS, VEHICLE CONTINUES TO TRAVEL WHILE THE BRAKES ARE APPLIED. HARD BRAKE PEDAL PRESSURE MUST BE APPLIED TO STOP.

I WAS ON A MAJOR HIGHWAY TRAVELING WHEN THE TRAFFICE BECAME STOP AND GO. AS I WAS TRAVELING IN HEAVY TRAFFIC FOR ABOUT 5 MINUTES, MY BRAKE BECAME STIFF AND WOULD NOT ALLOW ME TO STOP AS NORMAL. I WAS ABLE TO STOP JUST SHORT OF REAR-ENDING THE VEHICLE IN FRONT OF ME, HOWEVER IT WAS MERELY BY INCHES. CONSIDERATIONS : I WAS ON A SLIGHT DECLINE AND MY VEHICLE HAS START ASSIST WHERE THE BRAKE PEDAL REMAINS STIFF WHEN IN EFFECT, IT FELT LIKE THIS ACTIVATED. I CONTINUED TO INCREASE PRESSURE THROUGH WHICH I THOUGHT I HEARD THE ABS ACTIVATE AND THE VEHICLE STOPPED.

AT LOW SPEEDS BREAK PEDAL WILL NOT DEPRESS AND I HAVE A HARD TIME STOPPING THE TRUCK. I ALMOST HIT A CAR YESTERDAY AND AFTER DOING SOME RESEARCH FOUND THAT THE VACUUM PUMP FAILURE IS A KNOWN PROBLEM. THIS IS EXTREMELY SCARY AND DANGEROUS. SOMEONE COULD EASILY HIT A PEDESTRIAN. MY TRUCK HAS LESS THAN 50,000 MILES, WHICH SEEMS TO BE THE AVERAGE FOR THIS PROBLEM.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT WHEN THE BRAKE PEDAL WAS APPLIED, THE VEHICLE FAILED TO RESPOND. THE CONTACT HAD TO APPLY FORCE TO THE BRAKE PEDAL TO STOP THE VEHICLE. LAURA BUICK GMC (903 N BLUFF RD, COLLINSVILLE, IL 62234, (618) 344-0121) DIAGNOSED THAT THE BRAKE VACUUM PUMP MAY NEED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE CONTACT WAS UNCERTAIN IF THE FAILURE WAS RELATED TO NHTSA CAMPAIGN NUMBER: 14V339000 (STEERING, SERVICE BRAKES, HYDRAULIC). THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VIN AND FAILURE MILEAGE WERE NOT AVAILABLE.

SEVERAL TIMES AT LOW SPEED MANEUVERING THE BRAKE PEDAL BECAME HARD, REQUIRED INCREASED EFFORT TO DEPRESS, AND BRAKING DISTANCES WERE INCREASED. OCCURS RANDOMLY AND WITHOUT WARNING. NO ACCIDENTS YET, BUT SEVERAL CLOSE CALLS. VEHICLE HAS ONLY 44,000 MILES.