What 639 owners told NHTSA about the 2017 GMC Acadia Denali

THIS ISSUE HAS HAPPENED 3 TIMES NOW AND IS BECOMING A SAFETY CONCERN FOR MY FAMILY AND I AND FOR OTHERS ON THE ROAD. I PURCHASED THE CAR BRAND NEW IN MAY 2017 AND THE ISSUE OCCURED FOR THE FIRST TIME ON OCTOBER 02, 2017. SECOND TIME WAS FEBRUARY 15, 2018 AND THE THIRD TIME HAPPENED AROUND EARLY APRIL 2018. WHILE DRIVING AT A SLOW SPEED (ENTERING A PARKING LOT, IN THE MIDDLE OF AN INTERSECTION WHEN I WAS ABOUT TO MAKE A LEFT TURN ON A GREEN LIGHT, AND WHILE DRIVING IN A PARKING LOT AFTER GETTING GAS) THE CAR MADE A GRINDING/CLUNKING SOUND AND WAS BROUGHT TO A VERY ABRUPT STOP. I TRIED TO PRESS THE GAS BUT THE CAR WOULD NOT MOVE. I CHANGED THE GEAR FROM DRIVE TO PARK AND THEN DRIVE AGAIN AND WOULD STILL NOT MOVE. I TURNED THE CAR OFF AND THEN BACK ON AND STILL NOTHING. I ENDED UP FIGURING IT OUT BY PRESSING THE PARKING BREAK BUTTON 1-2 TIMES AND WAS THEN ABLE TO PROCEED TO DRIVE. IT SEEMS AS THOUGH SOMETHING MAY HAVE TRIGGERED THE PARKING BRAKE BUT WHILE I WAS IN DRIVE AND WHILE THE VEHICLE WAS MOVING. I WAS ALMOST REAR ENDED WHEN THIS HAPPENED IN THE INTERSECTION AND ALSO DURING THE TIME I WAS UNABLE TO MOVE IN THE INTERSECTION, MY LIGHT HAD CHANGED TO YELLOW AND THEN RED AND ONCOMING TRAFFIC WAS HONKING BECAUSE THEY COULD NOT GO ON THEIR GREEN LIGHT DUE TO ME BEING STOPPED IN THE INTERSECTION. IT WAS VERY SCARY AND DANGEROUS AS IT ALMOST CAUSED AN ACCIDENT 2 OUT OF THE 3 TIMES IT HAS HAPPENED. I TOLD SERVICE DEPT AT THE DEALERSHIP ABOUT IT TWICE. THEY HAVE "LOOKED INTO IT" ONE TIME BUT SINCE THEY WERE NOT ABLE TO REPLICATE THE ISSUE (OBVIOUSLY), THERE IS NOTHING THEY CAN DO. I AM CONCERNED ABOUT MY FAMILIES SAFETY IF THIS CONTINUES TO HAPPEN.

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ENGINE FEELS LIKE ITS GOING TO STALL WHEN STOPPED AT STOP SIGNS OR RED LIGHTS. THE CAR LUNGES FORWARD WHEN IN PARK ON AN INCLINE.

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WHEN THE VEHICLE IS IN PARK AND YOU TRY TO TURN IT OFF WITH THE START/STOP BUTTON AN ON DASH ERROR CODE OF "SHIFT TO PARK" APPEARS EVEN THOUGH THE VEHICLE IS CLEARLY IN PARK. YOU ARE NOT ABLE TO TURN THE VEHICLE OFF. I TOOK THE VEHICLE IN FOR SERVICE ON 6/4/18 AND WAS TOLD THAT GM IS AWARE OF THE ISSUE HOWEVER THEIR ENGINEERS HAVE NOT FOUND A SOLUTION. THIS CURRENTLY IS FORCING ME RESTART THE ENGINE, PUT MY CAR IN REVERSE, SHIFT BACK IN DRIVE, TRY RE PARKING AND TURNING OFF AGAIN REPEATING THE PROCESS UNTIL IT EVENTUALLY TURNS OFF. I DO NOT KNOW IF MY CAR IS TRULY IN GEAR OR NOT. I'M AFRAID THAT IT MIGHT CAUSE A DANGEROUS SITUATION.

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I WENT TO A LOCAL DEALER AND COMPLAINED ABOUT A VIBRATION/RUMBLE WHILE DRIVING. IT HAPPENED MOSTLY AROUND 1200-1700 RPM. THE SERVICE MANAGER HEARD OF THE PROBLEM. THERE WAS A MANUFACTURERS BULLETIN OUTLINING THE PROBLEM AND SUGGESTING A FUEL MANAGEMENT SOFTWARE UPGRADE. THIS WAS DONE. THE BULLETIN ALSO APPLIED TO CADILLAC XT5, WHICH IS ON A SHARED PLATFORM WITH MY 2107 GMC ACADIA DENALI AWD. THERE ARE NOW SEVERAL NEW RPM RANGES WHEN THE VIBRATION/RUMBLE OCCURS IN ADDITION TO THE OLD 1200-1700. NOT ONLY HAS THE OLD PROBLEM RE-APPEARED BUT THERE ARE CERTAIN CONDITIONS ABOUT 1500 RPM WHEN I AM STARTING OUT FROM A STOP FOR ABOUT 50 FEET WHERE THE PROBLEM SEEMS TO ALMOST STALL OUT AND THEN WITH A BIG CLANK (LIKE DOWN SHIFTING OR TRANSMISSION IS SLIPPING AND THEN SUDDENLY ENGAGES) AND TAKES OFF. I CANNOT HELP BUT THINK THERE IS GOING TO BE A MECHANICAL BREAKDOWN OF SOMETHING DUE TO THE SUDDEN ENGAGEMENT AND CLANK OR EVEN STALLING OUT IN TRAFFIC, IF THIS PROBLEM IS NOT FIXED. I CONTACTED THE DEALER ONCE AGAIN BUT HAVE NOT HEARD BACK YET.

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A MESSAGE SHIFT TO PARK KEPT APPEARING WHEN THE CAR WAS IN PARK AND SHUT OFF. THEN I PUT THE CAR IN REVERSE AND THE ENTIRE CARE LOCKED UP. (A MESSAGE FROM GMC -GENERAL MOTORS LLC (GM) IS RECALLING CERTAIN 2018 CHEVROLET EQUINOX AND GMC TERRAIN VEHICLES AND 2017-2018 GMC ACADIA VEHICLES. THE RIGHT FRONT INTERMEDIATE DRIVESHAFT MAY FRACTURE AND SEPARATE WHILE DRIVING.)

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FRONT RIGHT DRIVESHAFT SEPARATED WHILE DRIVING CAUSING A PULL TO THE RIGHT.

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2017 GMC ACADIA DENALI AWD. WHILE ACCELERATING ON TO A HIGHWAY, AFTER MOVING FORWARD PARTIALLY INTO A LANE, MY VEHICLE LOCKED UP AND WOULD NOT MOVE FORWARD. WHEN PRESSING THE GAS PEDAL, A LOUD GRIDING NOISE WOULD OCCUR. WEEKS LATER, PROBLEM UNDIAGNOSED AND VEHICLE STILL AT GMC FOR REPAIR.

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I HAVE HAD A VIBRATION IN MY CAR WHEN YOU WOULD DRIVE ALL THE TIME TOOK IT TO THE DEALERSHIP ON A NUMBER OF OCCASIONS THEY COULDN'T FIGURE IT OUT. THEY ALL SAID IT WAS NORMAL WHY THE CAR DRIVES. I THOUGHT IT WAS THE TIRES. TOOK IT TO NTB TALK TO THEM ABOUT HE SAID IT'S TIRES MOST LIKELY. SO I CALL TIRE MANUFACTURER AND THEY GAVE ME NEW TIRES. I REQUESTED GM DO THIS THEY TOLD ME NO. I HAD THEM REPLACED BY NTB I REQUESTED TO GM THEY REIMBURSE FOR THE INSTALLATION OF THE TIRES WHICH WAS A LITTLE OVER $101.00 THEY SAID NO. I WANT TO BE HELPED WITH THIS. GM DIDN'T WANT TO DO WHAT IS RIGHT AND FIX THE ISSUE ALSO PAY ME BACK FOR WHAT SHOULD HAVE BEEN COVERED UNDER WARRANTY BUT WOULDN'T REPLACE THE TIRES SO I HAD TO DO WHAT I HAD TO TO GIVE MY WIFE AND SON A SAFE CAR TO BE IN. CAN YOU PLEASE HELP ME OUT

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THE VEHICLES BRAKES BECAME DEFECTIVE AND STOPPED WORKING WHICH CAUSED AN ACCIDENT.

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WE BOUGHT THIS VEHICLE IN LATE JANUARY 2018. THE CAR WAS A NEW 2017 GMC ACADIA. WE HAD THE CAR A FEW DAYS WHEN MY WIFE SAID THAT SHE COULD NOT GET THE HORN TO WORK. SHE SAID SHE LOOKED AT THE MANUAL AND FOUND WHERE TO PUSH BUT NOTHING. I TRIED AND COULD NOT GET THE HORN TO WORK EITHER I CALLED TO AND MADE AN APPOINTMENT FOR THE DEALER SERVICE TO LOOK AT THE CAR. THEY INFORMED ME THAT IT NEEDED A NEW CONTACT. TOLD ME THEY WOULD CALL WHEN THE PART COMES IN. I STILL HAVEN'T HEAD FROM THEM AND CALLED A COUPLE OF TIME AND WAS TOLD AGAIN, WE'LL CALL AS SOON AS THE PART COMES IN. I BELIEVE THIS IS A BIG SAFETY PROBLEM AS SEVERAL TIME WE NEED THE HORN AND COULD NOT GET IT TO WORK.

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TL* THE CONTACT OWNS A 2017 GMC ACADIA. WHILE DRIVING UNKNOWN SPEEDS, THE HEADLIGHTS FAILED TO PRODUCE ADEQUATE LIGHT. THE VEHICLE WAS TAKEN TO KING BUICK GMC (16200 FREDERICK RD, GAITHERSBURG, MD 20877), BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 8,600. *TT *JS

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HORN IS EXTREMELY DIFFICULT TO SOUND. IT TAKES STRONG PRESSURE ON ONLY ONE AREA OF THE SURFACE TO SOUND. MY WIFE HAS NEVER BEEN ABLE TO DO IT. WOULD BE ALMOST IMPOSSIBLE TO SOUND IN AN EMERGENCY. THERE ARE MANY INSTANCES OF THIS ISSUE ON LINE. ATTATCHED IS THE DEALERS STATEMENT. BOTH THE DEALER AND GMC REP SAY IT IS WORKING AS DESIGNED. IT HAS BEEN LIKE THIS SINCE NEW. (NOV. 2017)

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TL* THE CONTACT OWNS A 2017 GMC ACADIA. WHILE DRIVING AT VARIOUS SPEEDS, THE HORN DID NOT WORK. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO MAXON BUICK GMC (2301 U.S. 22, UNION, NJ 07083, (908) 964-1900). THE DEALER DUPLICATED THE FAILURE AND CONSULTED WITH THE CHIEF ENGINEER OF THE GMC MANUFACTURER WHO RECOMMENDED THAT THE STEERING WHEEL BE REPLACED WITH A CUSTOM-MADE STEERING WHEEL. THE FAILURE RECURRED AFTER THE REPLACEMENT OF THE STEERING WHEEL. THE VEHICLE WAS TAKEN BACK TO THE SAME DEALER AND THE TECHNICIAN DIAGNOSED THAT THE AIR BAG NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND THE CONTACT WAITED FOR FEEDBACK. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 500.

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PANORAMIC ROOF EXPLODED.CLEAR DAY, NO OVERHEAD TREES WIRES ETC. 2 LANE ROAD IN NC.

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HORN IS ALMOST IMPOSSIBLE USE ESPECIALLY IN AN EMERGENCY SITUATION. VERY HARD TO ACTIVATE AND TAKES 2 HANDS TO GET IT TO WORK. DEALER CLAIMS NO FIX BUT MULTIPLE COMPLAINTS. THIS IS ONGOING SINCE VEHICLE WAS PURCHASED IN JULY 2017

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2017 GMC ACADIA DENALI. CONSUMER WRITES IN REGARDS TO MECHANICAL ISSUES. *LD THE CONSUMER STATED THE VEHICLE WAS RUNNING VERY LOUD AND ROUGH UPON INITIAL START UP. THE CHECK ENGINE AND SERVICE ELECTRIC PARKING BRAKE LIGHT ILLUMINATED. SERVICE PARKING BRAKE APPEARED ON THE DIC, A MESSAGE STATING AWD OFF APPEARED IN THE DIC. AND A NOTIFICATION FOR AN ISSUE WITH THE EMISSIONS SYSTEM ALSO APPEARED. *JS

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HEADLIGHTS ARE DIM TO THE POINT OF BEING DANGEROUS. DEALER CONFIRMS THAT ALL 2017 ACADIA ARE LIKE THIS. THIS IS BY NO MEANS THE FIRST COMPLAINT ABOUT THIS ISSUE. AN ACCIDENT WAITING TO HAPPEN.

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THE ADAPTIVE CRUISE CONTROL (ACC) IN MY 2017 ACADIA DENALI WILL SHUT OFF AND EVEN CAUSE THE VEHICLE TO BREAK FOR NO REASON. THIS HAS HAPPENED NUMEROUS TIMES, EVEN WITH NO OTHER VEHICLE ON THE ROAD OR OBSTACLES IN THE ROAD. WHEN IT HAPPENS THE ACC WILL SHUT OFF, YOU WILL HEAR TWO DISTINCT CHIMES AND YOU WILL SEE A MESSAGE SAYING, 'ADAPTIVE CRUISE CONTROL DISENGAGED'. AFTER THIS HAPPENS YOU WILL NOT BE ABLE TO REENGAGE THE ACC AND IF YOU TRY THE VEHICLE WILL DISPLAY A MESSAGE THAT SAYS 'TEMPORARILY UNAVAILABLE.' I HAVE HAD IT TO THE DEALERSHIP NUMEROUS TIMES AND THEY HAVE STATED THEY DON'T KNOW WHY IT WOULD HAPPEN, AND CANNOT DO ANYTHING UNLESS THEY CAN DUPLICATE IT. IT HAPPENS A LOT BUT THE DEALERSHIP AND GMC SAY THERE IS NO PROBLEM. THE FIRST TIME THIS HAPPENED IT ALMOST CAUSED MY WIFE TO WRECK, SINCE THE ACC SHUT OFF AND APPLIED BRAKES WITH NO OTHER CAR ON THE ROAD, BADLY STARTLING HER, AND SHE THOUGHT SHE HAD HIT SOMETHING. I EVEN HAVE A VIDEO OF THE ACC SHOWING 'TEMPORARILY UNAVAILABLE' AFTER ONE OCCASION IT SHUT OFF AND SLOWED THE VEHICLE. IN THIS INSTANCE THERE WERE NO CAR IN FRONT OF ME OR ON EITHER SIDE, BUT THERE WAS ONE BEHIND ME WHO I AM SURE WAS NOT HAPPY WHEN THE VEHICLE IN FRONT OF HIM BRAKED FOR NO REASON. A GMC REPRESENTATIVE TOLD ME I CAN HAVE ALL THE VIDEO I WANT, BUT IT 'DOESN'T MATTER AND WON'T CHANGE ANYTHING'. THE DEALERSHIP DID DO A COMPLETE DIAGNOSTIC ON ONE OCCASION AND FOUND EVIDENCE THAT THE ACC HAD SHUT OFF, BUT THE CODE DID NOT SAY WHY IT SHUT OFF. THIS HAS HAPPENED AT DIFFERENT SPEEDS RANGE FROM 55 TO 75 MPH. WE HAVE HAD IT HAPPEN THREE TIMES IN A 30 MINUTE PERIOD AND DROVE FOR A MONTH WITHOUT IT HAPPENING. THIS CAUSES AN UNSAFE DRIVING EXPERIENCE AND SHOULD BE FIXED OR THE VEHICLE REPLACED. I HAVE FOUND OTHER PEOPLE ONLINE WHO HAVE EXPERIENCED THIS, BUT THERE ARE NOT ENOUGH OF US TO WARRANT GMC DOING ANYTHING.

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AFTER RELEASING ELECTRONIC PARKING BRAKE, THE SERVICE PARKING BRAKE LIGHT COMES ON AND THE PARKING BRAKE LIGHT FLASHES. PARKING BRAKE IS NO LONGER OPERATIONAL.

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HIGH HORN EFFORT - HORN DOES NOT ACTIVATE WHEN PRESSED ON. DRIVER HAS BEEN UNABLE TO NOTIFY OTHER CARS COMING INTO THEIR LANE. CONCERNED THAT THEY WILL BE UNABLE TO AVOID AN ACCIDENT. TOOK DELIVERY OF VEHICLE ON 01SEP2017 WITH THIS AS A KNOWN ISSUE. HAVE NOT HAD ANY RESOLUTION UNTIL VEHICLE WENT INTO SERVICE AROUND 09JAN18. BULLETIN ISSUED TO REPLACE WIRE HARNESS. THIS NEW WIRE HARNESS DID NOT IMPROVE THE CONDITION AT ALL - MAY EVEN BE WORSE THAN BEFORE. THIS IS A SAFETY ISSUE - GM NEEDS TO ADDRESS THIS IMMEDIATELY. THIS IS EITHER DUE TO THE DRIVER AIRBAG CUSHION PACK HEIGHT OR WIRE HARNESS LIMITING HORN TRAVEL.

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AS MUCH AS I LOVE THE VEHICLE AS A WHOLE, IT UNFORTUNATELY HAS THE WORST HEADLIGHTS I HAVE EXPERIENCED IN ANY VEHICLE THAT I HAVE EVER DRIVEN. AS SOMEONE WHO HAS PERFECT VISION, I OFTEN FIND MYSELF SQUINTING TO SEE THE ROAD AHEAD OF ME AND VARIOUS SIGNS. IT HAS GOTTEN TO THE POINT WHERE I HAVE RESORTED TO DRIVING WITH MY HIGH BEAMS ON, JUST SO I CAN SEE WHERE I'M GOING IN CITY STREETS, HIGHWAY DRIVING, AND MAKING TURNS. I'VE NEVER HAD THIS ISSUE WITH ANY OTHER VEHICLE THAT I HAVE DRIVEN AND THE UNFORTUNATE THING IS THAT MY FATHER HAS NEARLY THE SAME IDENTICAL VEHICLE AS ME AND IS EQUALLY DISSATISFIED WITH THE HEADLIGHTS. I WOULD CONSIDER THESE AS DANGEROUS AS ANYTHING TO DRIVER, PEDESTRIAN, AND PROPERTY RELATED SAFETY. I WOULD STRONGLY URGE THAT IF GM DOES NOT STEP UP AND CORRECT THIS DANGEROUS OBSTACLE TO MY LIFE, THEN I WOULD STRONGLY URGE AN INVESTIGATION AND AN IMMEDIATE RECALL OF THIS VEHICLE BY THIS ORGANIZATION.

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THE HEADLIGHT HIGH BEAM LIGHT PATTERN IS A VERY DIM AND NARROW FOCUSED BEAM AND DOES NOT ALLOW ENOUGH SIDE TO SIDE ILLUMINATION. THE LEFT AND RIGHT SIDE LIGHTING IS VIRTUALLY NON-EXISTENT ON WET ROADS WHEN THE HIGH BEAMS ARE ON. THE HIGH BEAMS ALSO CONVERGE TO A SMALL NARROW SPOT ON THE ROADWAY. THE LACK OF EFFECTIVE LEFT AND RIGHT SIDE ROAD LIGHTING IS A SAFETY ISSUE AS IT IS EXTREMELY DIFFICULT TO SEE PEOPLE OR OBJECTS.ON THE SIDE OF THE ROAD. ALSO, THE LOW BEAMS LACK SUFFICIENT.BRIGHTNESS ALTHOUGH THE LEFT AND RIGHT SIDE LIGHT PATTERN IS SUFFICIENT. ALTHOUGH MY COMPLAINT WAS ESCALATED TO A GMC SENIOR ADVISOR, NO ACTION WAS TAKEN BY GMC. THE ADVISOR STATED, "WORKS AS DESIGNED". NO ALTERNATIVE BULB OR AFTER MARKET LIGHTING WAS RECOMMENDED BY GMC AS I WAS TOLD THIS WOULD VOID THE WARRANTY. THE SAFETY CONCERNS MY FAMILY AND I FEEL ABOUT THE VEHICLES HEADLIGHTS WERE DISMISSED BY THE COMPANY.

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THE VEHICLE SHIFTS VERY HARSHLY BETWEEN SECOND AND THIRD GEARS WHEN ACCELERATING. SOMETIMES IT IS SO HARSH THAT IT SLAMS YOU BACK IN THE SEAT. THE DEALER SAYS THAT IT IS "NORMAL". IT BEGAN AFTER OWNING THE VEHICLE FOR ONE FULL YEAR.

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2 INSTANCES WITHIN A 2 WEEK PERIOD. ON 12/13/2017 VEHICLE IS BEING DRIVEN AND ENGINE POWER IS LOST AND CAR TURNS OFF WE HAD TO PULL OVER SIDE OF THE ROAD WHEN TRYING TO RESTART THE CAR IT SPUTTERS AND WONT START.. 2ND INSTANCE ON 12/24/2017 CAR WAS ONCE CAR WAS PUT IN GEAR IT STALLED WOULD NOT RESTART OR EVEN TURN OVER. DEALER REPLACED BATTERY AND FUEL PUMP REGULATOR MODULE THE 1ST TIME. 2ND TIME DEALER DOES NOT KNOW WHAT THE PROBLEM IS.

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I WAS DRIVING FOR APPROXIMATELY 20 MILES ON A HIGHWAY WITH MY WINDSHIELD WIPERS IN THE INTERMITTENT POSTION. THERE WAS A LIGHT SNOW COMING DOWN. THE WIPERS WORKED UP TO THIS TIME. THE DRIVER SIDE WINDSHIELD WIPER STOPPED WORKING. THIS AFFECTED VIABILITY DRAMATICALLY. IT WOULD HAVE BEEN WORSE WITH HEAVIER SNOW. I TOOK IT TO THE DEALER AND THEY FOUND THE SCREW HAD LOOSENED AND THE WIPER MOTOR AND WINDSHIELD WIPER WERE DISCONNECTED.

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