GMC Yukon Complaints (2023)

220 consumer complaints on file.

#11760082August 27, 2026
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
My 2023 GMC Yukon AT4 with the 6.2L V8 has experienced multiple serious engine-related failures. The original engine previously was making a whining / knocking noise, then seized and required complete engine replacement under a GM recall/campaign involving 6.2L engine failures. The replacement engine later developed a lifter/valvetrain failure and required lifter replacement. The vehicle is now again exhibiting a pronounced rhythmic mechanical knocking/tapping noise, primarily during cold starts after sitting for an extended period. The noise occurs on most cold starts and has been documented in multiple videos. The vehicle is currently at a GMC dealership for inspection. I provided the dealer with several videos clearly demonstrating the noise. The dealer has stated that it has not yet been able to reproduce the condition and is attempting additional cold-start testing. The exact cause is currently UNKNOWN. No consistent warning lights or dashboard messages have appeared with the current knocking condition. My concern is that this vehicle has already experienced a catastrophic engine seizure, followed by internal valvetrain/lifter failure in the replacement engine, and is now again exhibiting abnormal mechanical engine noise. I am concerned this may indicate another developing internal engine failure that could potentially result in engine seizure or sudden loss of power while driving, including at highway speeds or in traffic. The vehicle and engine remain available for inspection, and multiple video recordings of the recurring cold-start knocking are available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759987August 27, 2026
POWER TRAIN
The powertrain malfunctioned and it at the dealership for an engine replacement. The vehicle lost propulsion on a 2-lane road while passing another vehicle. It cut off completely and started to decelerate. There was no warning or indication that this would happen and was dangerous in that I was accelerating to pass another vehicle when the event occurred. I was able to safely pull into a driveway, but the vehicle would not crank as it could not detect what gear it should be in. It was towed to a GMC dealership locally who confirmed 2 days later that the engine would have to be replaced. It is under warranty and will take 3-4 weeks.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759547August 25, 2026
ENGINE
Vehicle became disabled. GM service center determined that the crankshaft failed and lifter rods bent causing total engine failure. GM service center unable to determine cause and the engine is being replaced at a significant out of pocket cost.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759282August 24, 2026
ENGINE
While driving down [XXX] in [XXX] engine had a major failure causing the loss of power and control of the vehicle going interstate speed. Luckily no accidents and no injuries or fatalities. All the these vehicles using the 6.2L engines made by GM should be bought back by GM at full purchase price. A few months ago my vehicle underwent the recall procedure and passed. So the recall process is incomplete and shows no real problem solving procedures, These vehicles are a ticking time bomb to all the owners and fellow motorists. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11759162August 24, 2026
ENGINE
This car was subject to the GM Recall N2524940000 – This is related to engine failure in the vehicle. My Yukon Denali received the recall service on XXX at Liberty Buick GMC in XXX. It was determined that my engine would not fail and the car needed the heavier oil and a new oil filter. The car also received a 10 year warranty on the engine as part of the recall. XXX We were traveling down XXX Southbound on XXX headed to Atlanta to see family for Easter Break. My wife, son CJ (Age -XXX), XXX (XXX), and our English Cream Golden Retriever , Goose. We were traveling at 75 MPH on cruise control when a car came out in front of me. The car slowed down to adjust for the car moving out in front of us and then the engine completely shut-off and the car shifted into neutral. The car electronics turned off briefly, then came back on, with the dashboard saying “Push Start to turn on”. I hit the start button and nothing happens, I pushed the button several more times and still nothing happened. This occurred between 1:45 - 2:00 At this point, I begin to move into the right lane as we are approaching Exit XXX in [XXX]. I pull off on the exit, go about half way down and pull to the side, stopping the car. I place the car into Park and then push start on the car, nothing happens. I attempt to do this for about 5 Minutes and the engine still will not start and the car will not shut off completely (All electronics are still working). There were no warning signs that the vehicle would fail. The vehicle was inspected by GMC who determined that the engine had failed and would require full replacement. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758992August 24, 2026
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
On August 22, 2026, I was driving my 2023 GMC Yukon Denali with the 6.2L V8 at highway speed when the vehicle began struggling to maintain power while climbing a hill. The engine then developed a noticeable knocking sound. Shortly afterward, the engine shut off completely while the vehicle was moving, causing a sudden loss of propulsion. I was able to bring the vehicle to a stop, but the engine would not restart. The electronic transmission also would not shift into Neutral and displayed a message indicating that the conditions required to shift were not met. Because the vehicle could not be shifted out of Park, the towing company had difficulty loading and unloading the vehicle. The failure occurred during normal highway driving and created a significant safety concern because the engine shut down without warning while the vehicle was in motion. I am aware of NHTSA Recall 25V-274 / GM Recall N252494000 involving certain GM vehicles equipped with the 6.2L L87 engine, as well as NHTSA Engineering Analysis EA25-007 concerning engine failures and loss of propulsion. At the time of this complaint, the dealership has not yet confirmed the specific mechanical cause of my vehicle’s failure. The vehicle is being taken to an authorized GMC dealership for diagnosis. I am submitting this complaint because of the sudden engine failure and loss of propulsion while traveling on a highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11758478August 21, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormal clunking sound. The contact pulled over and inspected under the hood. The vehicle was restarted, and the engine revved six times with smoke coming from under the hood. The contact stated that the transmission was previously replaced. The vehicle was towed to the dealer, who discovered that Jiffy Lube had used an incorrect engine oil during an oil change. The contact was informed to contact Jiffy Lube and file a claim. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 36,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11756524August 12, 2026
ELECTRICAL SYSTEM
I have a 2023 GMC Yukon AT4. The OnStar/telematics system stopped working. The blue OnStar button does not function and the vehicle no longer communicates with the myGMC app, resulting in loss of connected and OnStar services. A GMC dealership diagnosed a failed OnStar/telematics module and advised that the module must be replaced at a cost of approximately $1,200. I am concerned because this failure affects access to OnStar communication and emergency-related services. I have found reports from other GM owners describing similar telematics/OnStar module failures, and GM has issued service information addressing K73 telematics-module communication faults. I have also opened a case with GMC Customer Assistance. I am reporting this because I believe the repeated failure of a system used for emergency communication warrants investigation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11755336August 6, 2026
POWER TRAIN
About 6 times during higher speed operation 80+km/hr during a downshift, the rear wheels lock up causing panic from screeching tires and sudden deceleration. Extremely unsafe. The vehicle is in with the dealership and as suspected, they can't find any issues with codes or transmission pressures. We even have a sound recording of the tires locking up. Typical symptoms of the valve body failure. Hopefully there's parts available soon.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11752303July 23, 2026
ENGINE
2023 Yukon with 6.2; was "tested" at a local dealership in November 2025. Engine passed. Was given oil change with new oil/oil cap. In June of 2026, engine seized despite passing test in November & running the new oil since then.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11751947July 21, 2026
UNKNOWN OR OTHER
My 2023 GMC Yukon has had a strong mildew/musty odor coming from the HVAC system since the vehicle was new. The odor is most noticeable every time the vehicle is started after it has been sitting for several hours or overnight. After the system runs for a short time, the odor dissipates. This concern has been reported to my GMC dealer on multiple occasions. Previous repair attempts have not permanently corrected the problem, and the odor continues to worsen. The smell is now strong enough that it is embarrassing to have passengers in the vehicle. I have followed the recommended preventive measures, including replacing the cabin air filter, turning the A/C compressor off several minutes before shutting the vehicle off, and attempting to clean the HVAC system with commercially available products. None of these measures have resolved the issue. Based on discussions with other GMC Yukon owners, this appears to be a common and recurring problem affecting numerous vehicles of similar model years. Many owners report the same symptoms and repeated unsuccessful repair attempts. This suggests the issue may be related to the design or operation of the HVAC system, particularly moisture remaining on the evaporator core, rather than normal maintenance. I am requesting that GMC investigate this recurring defect and provide a permanent repair rather than temporary odor treatments. Owners should not have to repeatedly clean or service the HVAC system to address a condition that has existed since the vehicle was new.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11751858July 21, 2026
ENGINE, FUEL/PROPULSION SYSTEM, STEERING
The engine tries to die when in park. While stopped at a red light, it died and stated conditions not met to shift. Had to hit park button then restart it. This has happened 4 times. With & without auto start feature on
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11750642July 15, 2026
ENGINE
am filing a formal complaint regarding my 2023 GMC Yukon Denali, which experienced a catastrophic engine failure while I was driving on the highway with my family. The sudden failure created a dangerous situation, placing both my family and me at significant risk. As a result of the breakdown, I was forced to pay $260 out of pocket to have the vehicle towed to the dealership. After inspecting the vehicle, the dealership advised me that the engine requires complete replacement. There was no indication that the engine was going to go. Thankfully there was a shoulder on the highway and we were able to pull over. This could have caused an accident could've been fatal.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11749116July 8, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, POWER TRAIN
On June 25, 2026 my 2023 GMC Yukon Denali with 53,456 miles was brought to an authorized GMC dealership after displaying a Service 4WD warning light and exhibiting a groaning noise when shifting into Drive and Reverse. The vehicle was diagnosed with the following brake system fault codes: P25A2, C0511, C0517, C1595 and C1596. These codes indicate brake control module failure and wheel speed sensor faults which are safety critical components. The dealership confirmed these findings but stated the repairs are not covered under the GMC powertrain warranty. Given that these are safety critical brake system failures on a nearly new vehicle with only 53,456 miles, we contacted GMC Customer Care on July 1, 2026 to request coverage under goodwill warranty as we believe these failures constitute a manufacturing defect. A case was opened however after 7 days no case advisor has been assigned and no decision has been made despite two promised timelines not being met. The brake system failures on a nearly new vehicle represent a serious safety concern as these systems directly affect the vehicle's ability to stop safely. The vehicle has been at the dealership since June 25, 2026 and remains unrepaired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11747346June 30, 2026
ELECTRICAL SYSTEM, ENGINE
The contact owns a 2023 GMC Yukon. While the contact's wife was driving approximately 5-10 MPH on a city street and approaching a stop sign, the vehicle experienced a failure and became inoperable. The contact stated that while the driver was attempting to restart the vehicle, the battery warning light and engine warning light illuminated, and the "Low Battery - Start Engine" message was displayed. The vehicle was towed directly to a dealer to be diagnosed. The dealer was unable to determine the cause of the failure but provided an estimate for the valve springs inspection. The vehicle was not repaired. The manufacturer was notified of the failure and was working with the dealer to determine how to repair the vehicle. The failure mileage was approximately 71,481.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11747075June 28, 2026
VISIBILITY/WIPER
The vehicle is equipped with “rain-sensing windshield wipers” but they do not work due to poor design. They should not have failed this quickly (33,000 or so miles). The windshield wipers must be manually activated because of this defect, but since the manufacturer thought they would be automatic, they made the manual activation very hard to access. It is very dangerous trying to activate them while operating the vehicle because A) your eyes are off the road for an extended period in poor conditions and B) the control is in a hard-to-reach area. You have to turn the nob 6-7 positions to put the wipers on low or high, and for the first 5 positions the windshield wipers don’t activate.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11747070June 28, 2026
SEAT BELTS, ELECTRICAL SYSTEM, EXTERIOR LIGHTING
The panoramic sunroof has a substantial leak, even though the 2023 vehicle only has 33,000 miles on it. The drain lines are clear but water continues to significantly leak out of the rear passenger seatbelt housing onto the seatbelt. There is also significant water drainage through the rear interior lights onto the upper legs of rear passengers (children in car seats), causing a severe electrical hazard. The leaking caused by the drainage defect affects the interior lighting, the seatbelts, and is a potential electric hazard. This seems to be a common occurrence and the manufacturer should repair their defective products. The drainage pipes are obviously either not assembled correctly or the materials don’t hold up. This should not be occurring in a $55,000 vehicle with 30,000 miles. I have multiple videos I can provide but the file sizes are too large to upload, so I took screenshots. I am going to pay for the repair but I should be reimbursed by GMC.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11747033June 28, 2026
ENGINE
My car started making a knocking noise under the hood 2 days prior to it breaking down (6/19 & 6/20). On 6/21/26, I was driving down the interstate WITH my kids in the car and it shut down on its own. Lights came on my dash and the vehicle quickly slowed itself down and when I pulled over to a complete stop, the vehicle shifted into neutral and shut off. I was not able to crank it back up and had to pay a tow company $243 out of pocket to tow it to our local dealership in town. My insurance only covers $200 for towing. I am a week without a vehicle and just found out Friday (6/26) that a new motor will have to be ordered but it is on back order with no idea on when it may arrive. I cannot get an answer from GM or my local dealership on if a rental will be provided. I cannot make 2 car payments but I also have a job and cannot proceed without having a vehicle to drive. This has put me in a bind for a week already with no solution in sight. I expect GM to fix my problem asap since it is theirs to fix!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11746268June 24, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the low engine oil warning light illuminated. The vehicle was taken to the dealer and repaired under NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The contact stated that the recall repair was completed several months ago; however, the failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 34,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11745810June 22, 2026
ENGINE
Engine knocking vechile had loss of power. Had towed to dealer. Throwing all kinds of codes 6.2 L v8. Truck passed GM crap test in September and here we are at 59,000 with a blown motor. Lucky it did not go out under power and kill me or my small kids and family that was going to vacation with this truck the next day
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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