2016 GMC SIERRA DENALI Complaints

LOOSES BRAKE ASSISTANCE IN PARKING LOT AND SOMETIMES ON THE HIGHWAY,CHECK ENGINE LIGHT COMES ON WITH VARIOUS CODES THE MOST COMMON IS MISFIRE ON STARTUP IT HAPPEN IN DIFFERENT OCCASIONS.

MY 2016 GMC SIERRA 3500 DIESEL DENALI HAS BEEN IN THE SHOP 5 TIMES AND OVER 50 DAYS SINCE NOVEMBER 4, 2017 FOR AN EMISSIONS ISSUE. ON NOVEMBER 4 WHILE DRIVING, I RECEIVED A CHECK ENGINE LIGHT THAT SAID TO SERVICE THE EXHAUST SYSTEM AND A COUNTDOWN STARTED, REDUCING THE SPEED OF THE VEHICLE BY 10 MPH AFTER EVERY 50-75 MILES . THE VEHICLE HAD ABOUT 38,700 MILES AT THE TIME. THE ERROR MESSAGE THAT THE DEALERSHIP RECEIVED WAS P205B REDUCTANT TANK TEMPERATURE SENSOR PERFORMANCE. THEY REPLACED THE EMISSION REDUCTION TANK RESERVOIR AND COMPLETED A REGENERATION TEST. ON DECEMBER 11 I GOT THE SAME MESSAGE AND THEY RECEIVED A REDUCTANT HEATER CONTROL CIRCUIT LOW ERROR AND THEY REPLACED GLOW PLUG CONTROL MODULE. ON JANUARY 2 I GOT THE SAME MESSAGE AND THE DEALERSHIP REPLACED THE EMISSION REDUCTION FLUID SUPPLY PUMP MODULE. ON JANUARY 17 I GOT THE SAME ERROR AND THEY REPLACED REPLACED THE REDUCTION FLUID SUPPLY PUMP MODULE AGAIN. I GOT THE SAME SERVICE EXHAUST SYSTEM ERROR AND TOOK THE TRUCK BACK TO THE DEALERSHIP ON FEBRUARY 10. IT IS NOW FEBRUARY 27 AND THEY HAVE NOT IDENTIFIED THE PROBLEM. THERE APPEARS TO BE AN ISSUE WITH EITHER THE EMISSIONS SYSTEM OR THE COMPUTER THAT RUNS THE SYSTEM, BUT NO ONE CAN SAY FOR SURE.

THE REAR SEAT HEADRESTS ARE UNDERSIZED AND TOO SMALL TO PROPERLY PROTECT AND ACCOMMODATE TEENAGE AND ADULT PASSENGERS. ALSO, WHEN THEY ARE SET AT THEIR HIGHEST SETTING, THEY BECOME UNLOCKED WITH VERY LITTLE BACK OR SHOULDER PRESSURE AND FALL TO THE LOWEST SETTING. IN MY OPINION, THIS IS A SERIOUS SAFETY HAZARD.

THIS ISSUE STARTED A FEW MONTHS AFTER I PURCHASED THE TRUCK TOOK IT TO TWO DEALERS THEY SAY ITS NORMAL. CALLED GMC & THEY HAVE NO RECALL. WHEN DRIVING THE TRUCK & HAVE TO SLOW DOWN IN TRAFFIC THE AUTOMATIC TRANSMISSION DOWN SHIFTS & HAS A VERY NOTICABLE JERK. WILL ACTUALLY JERK THE HOLE TRUCK. PEOPLE WHO HAVE RODE WITH ME TELL ME I HAVE A TRANSMISSION PROBLEM. WHAT CAN I DO

TL* THE CONTACT OWNS A 2016 GMC SIERRA DENALI. THE CONTACT STATED THAT WHILE DRIVING AT 5 MPH, THE VEHICLE STALLED AND ROLLED BACKWARDS. THE CONTACT WAS ABLE TO RESTART THE VEHICLE BUT THE FAILURE RECURRED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 8,300. THE VIN WAS NOT AVAILABLE.