2015 GMC SIERRA 1500 Complaints

I FIRST NOTICED THE ISSUE ON THE MORNING OF SATURDAY, NOVEMBER 10TH AS I WAS BACKING INTO A PARKING SPOT. AS I WAS BACKING IN, I NOTICED ALL OF A SUDDEN THE BRAKE PEDAL WAS ON THE FLOOR AND I WAS ABOUT TO PLOW INTO A CURB AND THREW THE TRUCK IN PARK. I DIDN'T THINK ANYTHING OF IT. THE SECOND TIME IT HAPPENED WAS ONE DAY LATER AS MY FIANCE AND I HAD JUST COMPLETED A 200 MILE DRIVE HOME. I WAS PULLING INTO THE PARKING LOT AT OUR TOWNHOUSE COMPLEX AND AS I WAS PULLING FORWARD TO BACK INTO THE SPACE, I NOTICED I HAD NO BRAKING POWER WHATSOEVER. I HAD TO THROW THE TRUCK IN PARK TO KEEP IT FROM HITTING A NEIGHBORS VEHICLE. I OPENED THE HOOD WITH THE ENGINE RUNNING, AND NOTICED A TICKING NOISE I HADN'T HEARD BEFORE AND MY BRAKE PEDAL ONLY HAD ABOUT 1/4" OF TRAVEL LEFT. I COULD PULL THE PEDAL BACK TO WHERE IT IS SUPPOSED TO BE BUT IT WOULD JUST FALL BACK DOWN TO THE FLOOR. I WAS ABLE TO VERY SLOWLY AND CAREFULLY PARK THE TRUCK USING PARK AND THE PARKING BRAKE. WITH THE ENGINE STILL RUNNING AND THE VEHICLE IN PARK, I DEPRESSED WHAT WAS LEFT OF THE BRAKE PEDAL AND HELD IT TO THE FLOOR AND HEARD A MOANING NOISE COMING FROM THE AREA NEAR THE MASTER BRAKE CYLINDER AND COULD FEEL THE BRAKE PEDAL SHUDDERING UNDER MY FOOT. I FEEL UNSAFE DRIVING THIS VEHICLE AND I WAS GIVING NO WARNING OF THE BRAKE FAILURE. I AM HAVING THE VEHICLE TOWED TO SEWELL BUICK GMC IN DALLAS AND WILL UPDATE WHEN THEY FIND CAUSE. I WILL ALSO BE CALLING GM CUSTOMER SUPPORT AS I FEEL THIS IS A HUGE SAFETY HAZARD.

WHEN GOING UNDER 15MPH BRAKE PEDAL BECOMES HARD AND DOESN'T WORK. VEHICLE HAS 50K MILES. BRAKE BOOSTER DECLARED BAD BY MECHANIC. THIS ISSUE ALMOST CASUED ACCIDENT.

ISSUE WHEN BRAKING THAT CAUSES THE BRAKE PEDAL TO LOSE POWER AND CAUSES THE DRIVER TO DEPRESS THE PEDAL EXTREMELY HARD TO HAVE THE BRAKES ENGAGE. THE CAUSE APPEARS TO BE A FAULTY VACUUM PUMP THAT REQUIRES REPLACEMENT. THIS COULD BE POTENTIALLY A LARGE SAFETY ISSUE IF THE PUMP FAILS AND THE VEHICLE IS UNABLE TO BE STOPPED IN TIME TO AVOID A POSSIBLE COLLISION. THIS ISSUE HAS OCCURRED BOTH WHILE IN TRAFFIC ON A CITY STREET AND WHILE ATTEMPTING TO PARK THE VEHICLE.

THE VACUUM PUMP CONTROLLING THE BRAKES HAS FAILED. WHEN THE BRAKE IS PRESSED IN STOP/GO TRAFFIC, IT WILL FIRST STOP THE VEHICLE, BUT IF THE BRAKE IS RELEASED THEN PRESSED AGAIN, THE BRAKES WILL NOT WORK AND THE VEHICLE CONTINUES TO ROLL FORWARD. A MECHANICAL/ELECTRICAL NOISE CAN BE HEARD BEFORE THIS OCCURS. THIS IS MORE NOTICEABLE ON WET ROADS OR ROADS WITH A STEEP DECLINE.

AT LOW SPEEDS (PARKING SPEED, SCHOOL PICKUP LINES, CREEPING TRAFFIC SPEED) THE BRAKE PEDAL WILL LOSE ALL BOOST PRESSURE. THE BRAKE PEDAL BECOMES EXTREMELY STIFF AND INEFFECTIVE. THIS SITUATION OCCURRED ON A FEW OCCASIONS AND CAUSED GREAT ALARM WITH MYSELF AND MY WIFE. GREAT POTENTIAL EXISTS FOR AN ACCIDENT INVOLVING MACHINERY, ANIMALS OR HUMAN BEINGS. THE VEHICLE WAS TAKEN PROMPTLY TO THE LOCAL GMC DEALERSHIP FOR SERVICE WITH A COPY OF GM SERVICE BULLETINNO.: PIT5361B. THE DEALER KEPT THE VEHICLE FOR SEVERAL DAYS TO PERFORM AN EXISTING SAFETY RECALL FOR STEERING ANOMALIES (RECALL # 18289) AS WELL AS DIAGNOSE AND REPAIR THE BRAKE BOOST ISSUE. SERVICE BULLETIN PIT5361B WAS FOLLOWED AND THE VACUUM PUMP ASSEMBLY WAS REPLACED TO RESOLVE THE BRAKE BOOST ISSUE. THIS REPAIR OCCURRED AT 40728 MILES - JUST BEYOND WARRANTY COVERAGE TERMS. TOTAL COST OF REPAIR $686.56. THE BRAKE BOOST ISSUE HAS NOT REOCCURRED TO DATE SINCE THE REPAIR. THIS VEHICLE IS NOT ABUSED OR INVOLVED IN ANY RIGOROUS ACTIVITY. IT IS A GENERAL USE VEHICLE AND IS USED PRIMARILY FOR FAMILY ERRANDS AND ROAD TRIPS.

ALL SCREENS IN VEHICLE SHUT OFF WHILE DRIVING, ALMOST LIKE THE VEHICLE TURNED OFF. THEN I WAS GIVING A SERVICE NOTIFICATION THE THE STABILITRAK SYSTEM.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE THE VEHICLE WAS STATIONARY, THE STEERING SEIZED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC AND THE BATTERY WAS REPLACED, BUT IT DID NOT CORRECT THE FAILURE. CRAIN BUICK GMC OF CONWAY (710 SOUTH AMITY ROAD, CONWAY, ARKANSAS 72032, (501) 542-6045) WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 36,100. THE VIN WAS UNKNOWN.

WHEN BRAKES ARE APPLIED THE PEDAL IS HARD AND VEHICLE DOES NOT STOP. IT SEEMS TO HAPPEN WHEN GOING SLOW FOR EXAMPLE IN PARKING LOTS ETC. I HAVE READ OTHER ARTICLES WHERE PEOPLE ARE EXPERIENCING SAME THING AT HIGH AND LOW SPEEDS. IT DOES NOT HAPPEN ALL THE TIME, BUT IT STARTED 11/2017 AND I'VE EXPERIENCED THIS FOUR TIMES NOW AND THE WIFE AS WELL.CALLED GM THE OTHER MORNING WAS TOLD THERE WAS NO RECALL FOR THIS ISSUE PER GM SOME VEHICLES WERE AFFECTED BUT NOT MINE, EXPLAINING WHAT I'VE FOUND AND WAS TOLD TO TAKE THE VEHICLE TO DEALER FOR DIAGNOSTIC.ASKED IF IT WOULD HAVE TO BE THE DEALER CAUSE THEY WERE EXPENSIVE TO DO DIAGNOSTIC. WAS TOLD YES AND IT WOULD HAVE TO BE OUT OF POCKET.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT THE AIR CONDITIONING FAILED. THE CONTACT CALLED GAY BUICK GMC AT (832) 769-4379 (LOCATED AT 3033 GULF FWY, DICKINSON, TX 77539) AND WAS INFORMED THAT THEY WERE AWARE OF THE FAILURE, BUT THERE WERE NO RECALLS. THE VEHICLE WAS NOT TAKEN TO A DEALER. THE VEHICLE WAS LATER TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE CONDENSER WAS FRACTURED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER STATED THAT THERE WERE NO RECALLS AND PROVIDED CASE NUMBER: 8-4727896957. THE APPROXIMATE FAILURE MILEAGE WAS 44,000.

LOSES POWER WHEN TRYING TO ACCELERATE, PRESENTS A PROBLEM WHEN TRYING TO MANEUVER IN TRAFFIC AND SEMI STALLS FOR .2 SECONDS ENOUGH TO CAUSE A DELAY