2015 GMC SIERRA 1500 Complaints

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.

BRAKE PEDAL GOES SOFT AND CAN HIT THE FLOOR ON OCCASION. MOSTLY HAPPENS WITH IN REVERSE. 40K MILES. ALSO TRANSMISSION SHIFTS ARE ERRATIC. RPM CAN SHOOT UP BETWEEN SHIFTS.

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.

VEHICLE WAS PARKED AT WORK. STARTED THE VEHICLE TO GO HOME AND BACKED OUT OF SPACE AND THAT IS WHEN THERE WAS NO STEERING AVAILABLE. I COULD ONLY GO BACK. SO BACKED IT INTO ANOTHER PARKING SPACE, AND HAD TO LEAVE THE VEHICLE UNTIL THE NEXT MORNING WHEN I HAD IT TOWED TO THE NEAREST GM DEALERSHIP. THEY NOW TELL ME THAT THE MODULE IS DEAD AND THAT IT WILL COST US TO REPLACE THIS. ALSO WHEN REPLACING THE MODULE, IF THEY FIND THE STEERING RACK NEEDS TO BE REPLACED, WE WILL BE RESPONSIBLE FOR THIS AS WELL, ON TOP OF LABOR CHARGES. I HAD ONLY RECENTLY PURCHASED THIS VEHICLE 7 MONTHS AGO. I AM VERY DISAPPOINTED WITH THE RESPONSE FROM GMC IN THIS MATTER.

AT SLOW SPEEDS THE BRAKE ASSIST DOES NOT WORK. REQUIRES MUCH MORE EFFORT TO STOP VEHICLE. SEEMS RELATED TO FAULTY VACUUM PUMP AS MENTIONED BY OHTERS ON INTERNET FORUMS.

WHEN APPLYING BRAKES AFTER FIRST PUSH THE PEDAL GETS HARD AND DOESN'T STOP HARDLY. DOES IT EITHER GOING FORWARD OR REVERSE. HAS HAPPENED NUMEROUS TIMES SINCE TRUCK WAS BOUGHT NEW.

HEADLIGHTS ARE POOR. LOW AND HIGH BEAMS DO NOT ILLUMINATE THE ROAD EFFECTIVELY IN RURAL AREAS

LOSS OF POWER BRAKES WHEN CREEPING AND APPLYING BRAKES SEVERAL TIMES IN A SHORT TIME. TESTED AND CHANGED VACUUM PUMP.