What 17 owners told NHTSA about the 2018 GMC Sierra Denali

The contact owns a 2018 GMC Sierra Denali 1500. The contact stated that on several occasions while driving at speeds over 30 MPH, the vehicle started shaking abnormally. The contact stated that the vehicle stalled while driving on three separate occasions and stalled twice while slowing down. There was no warning light illuminated. The vehicle was able to restart each time, but on one occasion, several attempts were needed to restart the vehicle. The vehicle was taken to a dealer, where it was diagnosed, and determined that the transmission, torque converter, exhaust gaskets, filter, and 8D fluid needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 87,000.

NHTSA ODI 11728807

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 107,000.

NHTSA ODI 11723657

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no assistance and advised the contact that the running board needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but provided no assistance. The failure mileage was 35,000.

NHTSA ODI 11529615

CERTAIN 2018 GMC SIERRA 1500 DENALIS WERE ISSUED A RECALL FOR THE "ELECTRONIC BRAKE CONTROL MODULE". FOR MY VIN, IT DOESN'T SHOW THAT THAT ISSUE NEEDS TO BE FIXED (I JUST PURCHASED THIS TRUCK LAST WEEK), BUT IT INDEED DOES. WHEN COASTING AT A LOW SPEED ON A SMALL HILL, BRAKES ALMOST FEEL NON EXISTENT. GMC RECALLED MANY OF THEIR VEHICLES TO GET THIS ISSUE SORTED OUT WITH A SIMPLE, "SOFTWARE UPDATE". FOR SOME ODD REASON MY GMC'S VIN WASN'T UP FOR A RECALL WHEN IT CLEARLY NEEDS ONE, IM PLEADING FOR SOME HELP; I'M WORRIED FOR MY SAFETY BECAUSE OF THIS MANUFACTURER DEFECT. ANY HELP IS APPRECIATED, THANK YOU.

NHTSA ODI 11408155

HOOD VENT FELL OFF WHILE DRIVING NORMAL SPEEDS ON THE HIGHWAY AND HIT THE CAR BEHIND ME. I FEEL THAT THE CHEAP PLASTIC IS DEFECTIVE AND COULD CAUSE A PROBLEM WITH THE PART GOING AIRBORNE AT HIGH SPEEDS AND HITTING OTHER CARS.

NHTSA ODI 11406471

DRIVING DOWN THE HIGHWAY ABOUT 65MPH IT MADE A LOUD CLUNK AND I TOOK IT IN TO SERVICE DEPARTMENT AND THEY TOLD ME I WOULD HAVE TO PAY ABOUT $400.00 TO DRAIN THE TRANSMISSION FLUID AND REPLACE IT. I TOLD THEM M PICK UP ONLY HAS LESS THAN 15,000 MILES ON IT I DON'T THINK THIS IS FAIR, THE SERVICE GU SAID THE DON'T PAY FOR IT AND OTHER GMC DENALI CUSTOMERS HAD THEIRS DONE AND PROBLEM WAS SOLVED AND I WASN'T THE ONLY CUSTOMER THAT HAD THE ISSUE AND CORY FROM ALASKA AUTO BODY SAID IT WAS SAFE TO DRIVE

NHTSA ODI 11385369

ON THE MORNING OF OCT 26, 2020 @ 845AM... I WAS HEADING SOUTH ON 287 IN MANSFIELD TX. IT WAS RAINING HARD SO I WAS ONLY GOING 60 MPH. THE CAR IN FRONT OF ME WAS GOING 55 OR SO. WHEN THE RAIN AND WIND PICKED UP, THE CAR IN FRONT OF ME ABRUPTLY HIT ITS BRAKES. THAT'S WHEN MY TRUCK BRAKES LOCKED AND I BEGAN SLIDING OR BEING PULLED TO THE RIGHT. I WAS IN THE LEFT LANE ON THE 2 LANE HIGHWAY. HAD IT NOT BEEN FOR GOD AND ME, NOT PANICKING... I WOULD HAVE CRASHED! MY TRUCK FISH TAILED TWICE WHILE I WAS TRYING TO APPLY THE BRAKES BUT... I COULDN'T STOP. I ALMOST PUT THE TRUCK GEAR IN NEUTRAL BUT IT WAS RAINING SO SOMEHOW THE TRUCK MANAGED TO SLOW DOWN GOING UP A SMALL HILL, GIVING ME CONTROL BACK. THERE WERE 2 OTHER CARS THAT SEEN THIS. I WAS A NERVOUS WRECK! I IMMEDIATELY GOT OFF THE HIGHWAY AND WENT TO THE FIRST GAS STATION I SAW AND THANKED GOD NOTHING HAPPENED. THE PROBLEM I HAVE IS, WHAT IF MY FAMILY WERE IN THE VEHICLE? HOW IS IT THAT GM IS ALLOWED TO SELL THESE VEHICLES? ALSO, I SEARCHED ALMOST EVERY WEBSITE AND INCLUDED MY VIN... BUT EVERY REPLY SAYS MY TRUCK IS OK (UNTIL TODAY). I HAVEN'T HAD THIS TRUCK FOR A YEAR YET. BUT I'M READY TO TRADE IT IN. I DON'T FEEL SAFE AT ALL. I ALMOST WANT TO GET MY TRUCK TOWED HOME. WHY PUT PEOPLE LIVES IN JEOPARDY?

NHTSA ODI 11366524

I NEARLY DIED WHEN MY BRAKES FAILED ON MY 2018 GMC DENALI THIS MORNING. I WAS ONLY GOING 60 MPH WHEN ANOTHER DRIVER CUT IN FRONT OF ME, AND HIT THEIR BRAKES BUT WHEN I TRIED TO STOP, I COULD NOT! I THEN BEGAN SWERVING FROM LANE TO LANE BECAUSE IT WAS RAINING. THANK GOD I DIDN'T DIE AND THAT THE PERSON ON THE RIGHT SLOWED DOWN AND MOVED OUT THE WAY. THE TRUCK SEEMED TO BE PULLING ME TO THE RIGHT. WHY I HAVE NO IDEA. BUT WHY IS GM PUTTING PEOPLE LIVES AT RISK LIKE THIS? WHY ARE WE HAVING TO SUFFER OR PUT OUR FAMILIES IN JEOPARDY. THIS MAKES NO SENSE. MY CHEST STARTED HURTING REALLY BAD AFTERWARDS, BECAUSE I WAS SO SCARED. I WAS ON A 2 LANE HIGHWAY GOING STRAIGHT BUT EVEN THAT DOESN'T CAUSE A VEHICLE NOT TO RESPOND LIKE IT DID.

NHTSA ODI 11366569

WHILE DRIVING HIGHWAY SPEED (75MPH) THE STEERING WENT OUT AS I WAS TRYING TO GO THRU A CURVE., I HAD TO USE BOTH HANDS AND FORCE THE WHEEL TO TURN TO EXIT HIGHWAY. LUCKILY IT WAS ONLY A SLIGHT TURN I WAS TRYING TO NAVIGATE! IT THREW SERVICE CODE'C0475, THEY SAY IT'S THE STEERING GEAR! $2700 FIX I BELIEVE IT'S ELECTRONIC ERROR.

NHTSA ODI 11337730

WHILE GETTING MY TRUCK INSPECTED THE SHOP OWNER TOLD ME ABOUT A BULGE ON RIGHT FRONT TIRE. HE ASKED ME IF THEY SOLD THAT TO ME LIKE THAT I PROCEEDED TO TELL HIM YES. HE SAID IT SHOULD BE REPORTED SO THAT IS WHAT I'M DOING. I'M NOT SURE IF THIS IS COVERED. I CONSIDERED IT A SAFETY WHEN VEHICLE WAS PURCHASED IN TENNESSEE AND GOING TO UPSTATE NY, AND I'M 74 YRS OLD. WIDOW

NHTSA ODI 11329856

THE REAR END MAKES NOISE WHEN TURNING AND SOMETIMES STOPING. WHEN WEIGHT IS PLACE ON BED THE REAR END MAKE NOISES. SOMETHING IS WRONG IN THE REAR END OF THIS TRUCK. WHEN TRUCK IS MOVING AND TURNING YOU CAN HERE THE NOISE.

NHTSA ODI 11329880

TL* THE CONTACT OWNS A 2018 GMC SIERRA DENALI. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 19V328000 (ENGINE) HOWEVER, THE PART TO DO THE RECALL REPAIR WAS NOT YET AVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER HAD EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. SOECHTIN MOTORS GMC LOCATED AT (603 EAST KINGSBURY STREET, SEGUIN, TX 78155, (830)355-2098, WAS CONTACTED AND CONFIRMED THAT THE PART WAS NOT AVAILABLE. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. PARTS DISTRIBUTION DISCONNECT.

NHTSA ODI 11320407

TL* THE CONTACT OWNS A 2018 GMC SIERRA DENALI. THE CONTACT STATED THAT WHILE DRIVING AT NIGHT, THE HEADLAMPS FAILED TO ADEQUATELY ILLUMINATE THE ROADWAY. THE VEHICLE WAS TAKEN TO MURDOCK CHEVROLET BUICK GMC CADILLAC LOCATED AT (1955 MAIN ST, LOGAN, UT 84341, (888) 470-5760) WHERE THE TECHNICIAN ATTEMPTED TO ADJUST THE HEADLAMPS HOWEVER, THE HEADLAMPS WERE ALREADY ADJUSTED TO SPECS. THE CONTACT STATED THAT THERE WAS NO IMPROVEMENT IN VISIBILITY WHILE SHIFTING FROM LOW BEAM TO HI BEAM. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE CONTACT REQUESTED THAT THE VEHICLE BE BOUGHT BACK BY THE MANUFACTURER AND THE MANUFACTURER REFUSED. THE APPROXIMATE FAILURE MILEAGE WAS 4,000.

NHTSA ODI 11319221

1-IT NEEDS TO APPLY THE BRAKE SO HARD TO MAKE IT STOP AT 100 KM/HR AND ABOVE.. 2-THERE IS A JERK ON DOWN '2ND TO 1ST "AND UP SHIFTING 1ST TO 2ND GEAR. 3-FRONT PARKING SENSORS SENSITIVITIES IS NOT ACCURATE .

NHTSA ODI 11317267

TL* THE CONTACT OWNS A 2018 GMC SIERRA DENALI. THE CONTACT RECEIVED A RECALL NOTIFICATION FOR NHTSA CAMPAIGN NUMBER: 19V328000 (ENGINE). THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE AND STATED THAT THE PART WAS NOT AVAILABLE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.

NHTSA ODI 11228903

TL* THE CONTACT OWNS A 2018 GMC SIERRA DENALI. THE CONTACT STATED THAT THE HEADLIGHTS VIBRATED AND BOUNCED WHILE THE VEHICLE WAS IN MOTION. WHILE DRIVING ON ROUGH TERRAIN AND ALSO WHEN APPROACHING ONCOMING TRAFFIC, IT WAS DIFFICULT FOR THE CONTACT TO SEE THE ROAD. THE VEHICLE WAS TAKEN TO THE DEALER (MURDOCK MANHATTAN CHEVROLET-CADILLAC, 600 MCCALL RD, MANHATTAN, KS 66502, (785) 783-0639) WHERE IT WAS DETERMINED THAT THERE WAS NO FAILURE WITH THE HEADLIGHTS. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND A CASE WAS OPENED. THE FAILURE MILEAGE WAS APPROXIMATELY 6,181. *TT

NHTSA ODI 11110980

TL* THE CONTACT OWNS A 2018 GMC SIERRA DENALI. WHILE DRIVING VARIOUS SPEEDS, THE HEADLIGHTS MOVED WHEN DRIVING OVER A BUMP IN THE ROAD. THE VEHICLE WAS TAKEN TO WHITAKER BUICK GMC (131 19TH ST SW, FOREST LAKE, MN 55025, (651) 464-5612) AND MCCARTHY AUTO WORLD (3350 129TH AVE NW, COON RAPIDS, MN 55448, (763) 210-4576) AND WAS INFORMED THAT THE HEADLIGHTS WERE OPERATING AS DESIGNED. THE CONTACT NOTIFIED THE MANUFACTURER OF THE FAILURE AND A CASE WAS OPENED. THE APPROXIMATE FAILURE MILEAGE WAS 200.

NHTSA ODI 11079106