2024 Gmc Yukon

ENGINE FAILURE

6/16 Vehicle issues while driving home from work. Rough idle, multiple check engine lights coming on, Multiple warnings display on dashboard. Vehicle in limp mode from work to home. 6/20 While driving in Roanoke rough idle began. Vehicle check engine light appeared, limp mode only lasted for less than 30 seconds before it went back to normal. 6/23 Vehicle issues began again while driving to work. Pulled into parking lot, turned vehicle off and restarted. Vehicle seemed back to normal. Made appointment through GMC App for first available on 6/29. Leaving work vehicle check engine lights came on again and went into limp mode. 26,764 miles. Drove straight over to Hart GMC (2 miles away) and dropped it off. 6/30 Picked up Vehicle at Hart GMC. Miss fire on cylinder #3. Replaced spark plug #3 and cleared all dtcs codes. 8/6 Oil Change with Consumption Test started 29,072 miles 8/28 Engine Oil Low-Add Oil alarm. Instructed by dealer to not tamper with Test. Must drive 2000 miles before returning vehicle to validate consumption test. 29,728 miles 8/30 Pulling into drive way rough idle began. Vehicle check engine light appeared, limp mode, multiple lights. Scanned with OBD2 scanner- P0303 code. Misfire cylinder 3. 8/31 Vehicle towed from home to Hart motors 29,860 miles. Scanned by service showing P0300 codes along with other codes. I have documented all events with this engine since owning. Concerned the engine would run out of oil before validating consumption test (2000 miles). Dealer told me to keep driving even if it says add oil. Engine historically 2 qts low when add oil warning flashes.

Issues with the google voice, transmission issues, engine failure to start or restart. Reported same year vehicle was bought. Repeatedly. Dealership even with video evidence stated could not repeat issue and nothing wrong. My car then starts rattling in the engine and they do a full replacement had it for over three months. Now it’s leaking fluid and smoking. They try to send the consumer away and delay delay until the warranty is over. Unethical practices. They knew there was an issue with my engine as it was on the recall list but kept denying any issues until complete failure. Now less than 20 days after that repair the car is leaking and smoking.

On August 20, 2026, while driving my 2024 GMC Yukon XL Denali equipped with the 6.2L V8 engine at approximately 70 mph on the interstate, the vehicle experienced a sudden and complete loss of motive power without adequate warning. The vehicle unexpectedly shifted into neutral and would no longer accelerate or maintain highway speed. This occurred in active interstate traffic and almost resulted in a serious accident as I attempted to maneuver the vehicle out of the flow of traffic. The engine would not restart, and the vehicle had to be towed to a GMC dealership. The GMC dealership subsequently diagnosed that the engine had locked up and determined that the engine requires complete replacement. This failure created an immediate and significant safety hazard for me, my family, and surrounding motorists. My vehicle is affected by the 6.2L engine recall, and I am extremely concerned about the safety and reliability of the proposed replacement engine. I have become aware of reports from other owners alleging failures involving replacement engines as well, including similar sudden losses of propulsion. I am concerned that replacing the engine may not adequately address the underlying safety risk if replacement engines are experiencing similar failures. I am requesting that NHTSA investigate not only the original engine failure, but also whether replacement engines used as a remedy are adequately correcting the defect. A sudden engine lockup and complete loss of propulsion at interstate speeds presents a serious risk of collision, injury, or death.

My vehicle "passed" the engine recall only to have the engine blow at 33,000 miles. My vehicle was at the dealership for 52 days most of the time was spent waiting for the new engine. Dealership was amazing, GMC however is the worst. My new engine has about 1,000 miles on it and it stutters occasionally when the auto start turns on.

Vehicle has 43k miles on it and a has a failed oil pump, already switched to the heavier oil and still have engine issue

My 2024 GMC Yukon Denali equipped with the 6.2L L87 V8 experienced an engine failure on July 4, 2026. Prior to the failure, there was no visible damage, warning, or other evidence that the engine was about to fail. I drove the vehicle to purchase fireworks and shut the vehicle off normally when I arrived. When I returned to the vehicle after shopping, the engine problem became apparent. There had been no noticeable indication of an engine failure before I turned the vehicle off. The vehicle was subsequently taken to a GM dealership, where the engine failure was confirmed and ultimately required replacement of the 6.2L L87 engine. The vehicle remained out of service from July 4, 2026, until it was returned to me on August 21, 2026. The original failed engine was in the possession of the servicing GM dealership I purchased the car from. Not even 8 months later of purchase the vehicle needed a 3rd engine (original, recalled engine, warranty engine). The lack of warning before the failure is a significant safety concern to me. The vehicle had been operating immediately before I parked it, and there were no apparent symptoms that would have alerted me that a major engine failure was imminent. Had the failure occurred while the vehicle was traveling at highway speed or in traffic, the sudden loss of engine operation could have created a dangerous situation. The failure was confirmed by the GM dealership and resulted in replacement of the L87 6.2L V8 engine. I am submitting this complaint to document the failure and because of continuing concerns regarding the L87 6.2L V8 and the effectiveness and long-term reliability of the recall remedy. I am still currently waiting for the repair work documentation for the new (assuming it was new) motor. I have attached attempts to talk to GM, app incidents, repair work being completed.

Hello, I own a 2024 GMC Yukon Denali with the 6.2L V8. Car currently has 35,000 miles on it. At about 30,000 miles we started to feel a very aggressive vibration in the passanger seat, as well as the 2nd row seats, and driver seat. We took the vehicle in for the recall on the engine where we were instructed to put 0W-40 oil in. Much higher vescocity. After we did this recall the vehicle has not stopped shaking. We went for another service visit in July where we were told " this is the engine pistons trying to conserve fuel, and are firing causing the vibration." I have worked in the auto industry for 12 years, this is not a normal vibration. This should also not be caused by an engine. We then took it in again where they then proceeded to replace fuel manifold on August 18th. The vehicle shakes a bit less but still has a aggressive shake to it. I do not believe this is normal and if it is the engine pistons firing or the crank shafts misfiring, this could cause the engine to have catistrophic failure. This shake happens at speeds anywhere from 18 MPH to 50 MPH. My concern is with my wife and kids in this vehicle as the daily driver and this engine fails.

Driving about 75 mph car shuttered and motor quit running had to pull off of the highway and get towed to dealership. Motor had to be replaced due to 1,2,6,7 rod bearings spun on the crankshaft. 34367 miles

Complete engine failure, recall was performed before engine failed on highway with family inside.

The contact owns a 2024 GMC Yukon. The contact stated that while her husband was driving at approximately 45–50 MPH, the vehicle stalled. No warning light was illuminated. The driver pulled over to the side of the road, and the vehicle was towed to the dealer, where it remained for five weeks before being diagnosed. The dealer determined that the engine was blown and needed to be replaced. The vehicle was repaired at the owner's expense. The contact associated the failure with NHTSA Action Number: EA25007 (Engine, Engine and Engine Cooling). The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 63,073.

This is a supplemental report to my original complaint (NHTSA ID XXX) regarding my 2024 GMC Yukon (VIN [XXX]). I am providing additional detail: prior to GM's recall being issued, I contacted Hatchett Buick GMC by phone and visited in person on multiple occasions reporting engine sputtering, stalling, hesitation, and total loss of power and electrical shutdown while driving. I was repeatedly told these were minor issues not affecting anyone and not to worry about them. As a result, the vehicle was not formally serviced for these issues until September 2025 — roughly three months after the recall was finally announced, more than a year after I purchased the vehicle. Since that recall repair and a subsequent "best guess" repair performed by GM technicians (their own description, not mine), the vehicle continues to sputter, hesitate, stall, and intermittently lose power. I have ongoing safety concerns driving this vehicle INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Engine locked up and seized traveling 75mph on interstate with only 28,000 miles

The 6.2 GMC engine has been replaced. I took my Yukon in for a oil change, on the second engine, the tech said that it now has a new oil synthetic 0-40, and I have to have the oil changed every 3 thousand miles. I checked with a couple of mechanics and they all said, synthetic is good for at least 5 thousand miles, and just thicker oil will not solve the engine problems that have plagued GM. I am bringing this to your attention as these vehicles are pretty much worthless in the marketplace, and as such GM should refund or exchange for the 2027, with the new motors.

The engine began knocking on startup and on acceleration. The vehicle would sometimes have difficulty accelerating. Upon taking it to the dealership, they were able to duplicate the issue. Upon inspection by the dealership, 2 rod bearings had spun and caused crankshaft damage. The manufacturer approved a full engine replacement under the warranty. There were no warnings lights, messages, or any other symptoms of the problem prior to the first incident.

On the freeway in the middle of nowhere Denali jerked, went into neutral, and stopped completely. Needed to get towed and it was complete engine failure. Dealership needed to completely replace engine and radiator

I have a 2024 GMC Yukon Denali equipped with the 6.2L L87 V8 engine. The vehicle has approximately 23,000 miles. The vehicle previously underwent the remedy associated with the L87 engine recall. The engine now uses SAE 0W-40 dexos R oil and has the corresponding 0W-40 oil fill cap. After the recall remedy was performed, the check-engine warning light began intermittently FLASHING while I am driving. The light may flash for a period of time and then turn off again. I have also intermittently experienced the engine running rough or the vehicle shaking while idling. I have noticed the flashing warning light occurring while the engine is under load, including while driving uphill. I have video documenting the check-engine light flashing while the vehicle is being driven. Because the condition is intermittent, the warning light is not necessarily illuminated afterward. I am concerned because this vehicle is equipped with the L87 engine that was subject to GM recall N252494000/NHTSA Recall 25V-274 for potential engine damage/failure, and my vehicle appears to have already received the recall remedy. I understand NHTSA is currently investigating reports of L87 engine failures occurring after completion of that recall remedy. The cause of my vehicle's current symptoms is UNKNOWN and has not yet been diagnosed. The vehicle is available for inspection. I am filing this complaint because an intermittently flashing check-engine warning, rough/shaking operation, and the possibility of an engine malfunction or loss of propulsion present a safety concern, particularly if an engine failure occurs while the vehicle is being driven. I do have an appointment with a different GMC dealership for next week instead of the GMC dealership that sold it to me and preformed the original fix.

The contact owns a 2024 GMC Yukon XL. The contact stated that upon taking the vehicle to the dealer to be repaired under NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling), the contact was informed that the vehicle passed the inspection and no repair was needed. However, the vehicle experienced engine failure approximately seven months later. While driving 50 MPH, the vehicle lost motive power. There was no warning light illuminated. The driver pulled over, restarted the vehicle, and resumed normal driving. The vehicle was taken to the dealer the following morning, where the Electronic Control Module was replaced under warranty; however, the failure recurred while driving 70 MPH three weeks later. No warning light was illuminated. The driver pulled over, restarted the vehicle, and resumed driving; however, the vehicle failed to exceed 40 MPH and shut off. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that the engine, radiator and seal kit needed to be replaced. The vehicle was not yet repaired. The contact was concerned that the recall remedy failed to prevent the failure. The manufacturer was notified of the failure and a buyback was requested, but the request was denied, and the contact was referred to the dealer for additional assistance. The failure mileage was approximately 27,800.

On August 6, 2026, I was driving my family up to Whitefish Mountain Resort (a steep mountain road to a ski resort) for dinner when the ESC warning and "Brake System Failure" warning appeared. I immediately attempted to pull safely to the side of the road. When I pressed the brake pedal, the vehicle did not respond normally. I pushed the brake pedal as far down as I could and had essentially no braking ability. Because we were traveling uphill, the vehicle eventually rolled to a stop. When my brother came with his car he had a vehicle scanning tool. He hooked my vehicle up to it and the tool displayed diagnostic codes P25A2 and P3499. This was an extremely serious safety event. Had we been traveling downhill, approaching an intersection, or driving in heavier traffic, the outcome could have been catastrophic.

Driving on highway, engine stopped while driving 70+ mph. Had to get to the side of the multilane highway. Was towed to nearest GMC dealership. Dealer said the engine was locked up, and they have many vehicles right now with similar problems. They will have to replace the engine due to complete engine failure.