27 of the 332 complaints filed about the GMC Sierra Denali are about the engine — 8% of everything owners reported. The worst model year for it is 2020.
27
Complaints
8%
Share of all complaints
0
Crashes
0
Fires
ENGINE
The contact owns a 2020 GMC Sierra 1500 Denali. The contact stated that while parking the vehicle, there was an abnormal grinding sound coming from the engine. There was no warning light illuminated. The local dealer was contacted about the failure; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 98,500.
NHTSA complaint #11744588 — an unverified report by a vehicle owner.
ENGINE
The contact owns a 2017 GMC Sierra 2500 Denali. The contact stated that while driving at an undisclosed speed, the vehicle went into LIMP Mode. There was no warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the knock sensor had failed and needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 209,000.
NHTSA complaint #11727937 — an unverified report by a vehicle owner.
ENGINE
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 complaint #11723657 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
The contact owns a 2020 GMC Sierra Denali. The contact stated that while stopped at a traffic light with the brake pedal depressed, the vehicle shut off unexpectedly. There was no warning light illuminated. The contact made several attempts to restart the vehicle; however, the vehicle failed to restart. Due to the failure, the vehicle was towed to the dealer where a diagnostic test was performed. The contact was later informed that the engine had seized due to engine bearing failure, and the contact was provided an estimate for a new engine. Upon investigation, the contact discovered NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling) and linked the recall to the failure. The manufacturer was notified about the failure and the recall, and the contact was informed that the VIN was not included in the recall. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 190,000.
NHTSA complaint #11700178 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
The contact owns a 2017 GMC Sierra Denali. The contact stated that while driving approximately 40 MPH, the check engine warning light illuminated. The contact stated that the vehicle was shuddering and vibrating. The contact pulled over and opened the hood with the engine running. The contact stated that there was an abnormal ticking sound coming from the engine. The vehicle was driven to an independent mechanic, who diagnosed the vehicle and determined that the fuel injectors needed to be replaced. The vehicle was repaired; however, the vehicle was still running rough. The contact was advised by the mechanic that the fuel injectors needed to be reprogrammed, and the vehicle was taken to a dealer. The dealer reprogrammed the fuel injectors, but the vehicle was still running rough. The dealer had not opened the engine up to diagnose the failure; however, the dealer thought that there might be a failure with connecting rods. The vehicle was not repaired. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was not informed of the failure. The failure mileage was approximately 105,000.
NHTSA complaint #11698620 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
See attached document for complaint.
NHTSA complaint #11662568 — an unverified report by a vehicle owner.
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra Denali. The contact stated that while driving at 30 mph, a "Turn off engine, No oil pressure" message appeared and was accompanied by a warning chime alert. The vehicle was steered to the side of the road and turned off. The contact then observed condensation leaking under the front of the vehicle and condensation in the street leading to the vehicle. The vehicle was towed to the dealer where it was diagnosed that the engine oil cooler line detached and the engine oil cooler lines needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure and advised the contact to have NHTSA add his vehicle added to an unknown recall. The failure mileage was 77,000.
NHTSA complaint #11632450 — an unverified report by a vehicle owner.
ENGINE
The contact's father owns a 2020 GMC Sierra Denali 3500. The contact stated that while his father was driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer and diagnosed with a cylinder #1 misfire. The vehicle was repaired; however, the failure recurred. The vehicle was then taken to Wackerli Auto Center (1363 N Holmes Ave, Idaho Falls, ID 83401) on numerous occasions and diagnosed with a faulty sensor. The dealer replaced the sensor; however, the failure recurred. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 20,000. The VIN was unavailable.
NHTSA complaint #11441449 — an unverified report by a vehicle owner.
ENGINE
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 complaint #11385369 — an unverified report by a vehicle owner.
ENGINE
KNOCKING COMING FROM ENGINE - NOTICEABLE UNNECESSARY NOISE IN WHICH DEALER CAN NOT FIX THE PROBLEM
NHTSA complaint #11383781 — an unverified report by a vehicle owner.
ENGINE
TWO ISSUES BROKEN VALVE SPRING CAUSED ENGINE TO SHUT DOWN, SECOND SERVICE BRAKE, BRAKE FAILURE LIGHT, SERVICE ESC, SERVICE TRAILER BRAKE MESSAGES CAUSING BRAKE FAILURE
NHTSA complaint #11367036 — an unverified report by a vehicle owner.
ENGINE
I NOTICED SEVERAL SPOTS OF OIL ON MY DRIVEWAY, I THEN INSPECTED THE UNDERSIDE OF THE ENGINE (L5P) AND NOTICED OIL DRIPPING FROM SEVERAL BOLTS AND LINES. MY VEHICLE, A 2020 2500HD DENALI DIESEL, HAS ONLY 2,200 MILES ON IT FROM NORMAL HIGHWAY DRIVING.
NHTSA complaint #11363419 — an unverified report by a vehicle owner.
ENGINE
SINCE I'VE OWNED THIS VEHICLE I HAVE HAD TRANSMISSION PROBLEMS. ONCE IT WENT FROM 70 TO 20 ON THE HIGHWAY.. IT KICKS OR JERKS AT ANY SPEED... ESPECIALLY GOING SLOW.. THE SHIFTING IS HORRIBLE!!! THE FEELING OF IT LOSING POWER AGAIN LIKE IT DID COULD CAUSE SERIOUS DAMAGE TO THE TRANSMISSION AND UNSELFISH AND PASSENGERS.. I DON'T TRUST IT ON THE HIGHWAY!!! I KEEP A MONITOR CONNECTED TO MY TRUCK AT ALL TIMES.. THE DATES COINCIDE WITH THE PAPERWORK!! ONGOING TRANNY ISSUES ALL THE TIME!! I PAID WAY TO MUCH FOR THIS LEMON!! ENGINE VIBRATES AROUND 80.. AND IF YOU DON'T USE YOUR BLINKER.. THEY TRUCK FIGHTS YOU TO CHANGE LANES.. IT PULLS YOU BACK!!
NHTSA complaint #11352692 — an unverified report by a vehicle owner.
ENGINE
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 complaint #11320407 — an unverified report by a vehicle owner.
ENGINE
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 complaint #11317267 — an unverified report by a vehicle owner.
ENGINE
I RECEIVED A RECALL NOTICE MAY 2019 FROM MARYANN L. COMBS, VICE PRESIDENT GLOBAL VEHICLE SAFETY. THE LOCAL DEALERSHIP SAID PARTS WERE NOT AVAILABLE AT THAT TIME. A FEW MONTHS LATER, STILL NOT AVAILABLE AND TODAY, FEBRUARY 25,2020 THEY ARE STILL NOT AVAILABLE AND IT SEEMS THEY MAY NEVER BE AVAILABLE TO VEHICLES IN THE "SOUTHERN" STATES. MY TRUCK TRAVELS TO MN, MT, ND ON A REGULAR BASIS AND THE PROBLEM IN QUESTION NEEDS TO BE FIXED TO KEEP THE ENGINE WARM AT BELOW ZERO TEMPERATURES. NHTSA CAMPAIGN ID NUMBER IS 19V328 AND RECALL NUMBER WAS N182206311. PER THE LETTER FROM MS. COMBS USE OF THE CURRENT ENGINE BLOCK HEATER CABLE COULD RESULT IN AN ENGINE FIRE.
NHTSA complaint #11311363 — an unverified report by a vehicle owner.
ENGINE
ENGINE LIGHT KEEPS COMING ON TAKE IT TO THE DEALER I GUESS THEY RESET IT AND NOW THIS IS THE 3RD TIME IT'S NOW BACK ON, BACK UP CAMERA GOES OUT FROM TIME TO TIME,
NHTSA complaint #11309140 — an unverified report by a vehicle owner.
ENGINE
BRAKE SYSTEM FAILURE 62 MPH TOP SPEED; BRAKE WARNING LIGHT; CHECK ENGINE LIGHT; ABS LIGHT; TRACTION CONTROL LIGHT; STEERING ASSIST IS REDUCED - DRIVE WITH CARE; SERVICE TRAILER BRAKE SYSTEM.... LIGHTS ON DASH AS NOTED ABOVE. BRAKE PEDAL MAKES A CLICKING; POWER STEERING NON-EXISTENT; BRAKES WILL NOT STOP VEHICLE WITHOUT MAX PRESSURE. HAPPENED AT LOW SPEED. BUMPED INTO CART AT STORE BEFORE GAINING CONTROL. AFTER MULTIPLE SHUT DOWNS AND RESTARTS ALL LIGHTS NORMAL EXCEPT CHECK ENGINE LIGHT. BRAKES OCCASIONALLY MAKES CLICKING SOUND WITHOUT TOUCHING THEM. MILEAGE 6056
NHTSA complaint #11298009 — an unverified report by a vehicle owner.
ENGINE
WHEN I PURCHASED MY TRUCK ON 08/17/2019. THE WINDOW STICKER SAID MY HEATER BLOCK WAS DISABLE. THE SERVICE DEPT. SAID THERE IS A RECALL ON THIS. I CANNOT GO IN COLD WEATHER UNTIL THIS IS RESOLVED. CAN YOU TELL ME WHEN IT WILL BE RESOLVED.
NHTSA complaint #11281804 — an unverified report by a vehicle owner.
ENGINE
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 complaint #11228903 — an unverified report by a vehicle owner.