Engine And Engine Cooling Problems of GMC Yukon - part 2

While traveling on a state route in pennsylvania the engine unexpectedly locked up. This was confirmed by the dealer once it was towed to their lot and they were able to inspect it. To date, a replacement engine has not been able to be located yet, its been four weeks and no updates have been received.

On 9/11/26 the Yukon xl flashed a check engine light and message stated to service within 7 business days. 30 seconds later the power shut off and barely coasted to the side of the highway. Engine would turn over but not start. Could not shift into neutral b/c wouldn’t start. Error message: ecm - engine and transmission systemp102athe engine and transmission system is not performing as expected. An issue has been detected in the fuel management system used to maintain, control and monitor fuel consumption. If the check engine light is flashing, a misfire condition has been detected. A misfire increases vehicle emissions and could damage the emission control system on the vehicle. Please reduce vehicle speed, avoid hard accelerations, avoid steep uphill grades, and reduce any cargo loads such as a trailer. Service within 7 days had vehicle towed to dealership. Was repaired and picked up on 9/25/26. Paid for new battery over $400. 00 on 9/29/2026 Yukon xl would not shift into reverse. The error message on the car stated. Tcm - engine and transmission systemp2718. Odometer: 76117 miles.

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The contact owns a 2021 GMC Yukon. The contact's wife stated that while driving at an undisclosed speed, the vehicle lost motive power and was unable to restart. The vehicle was towed to a dealer, where it was determined that a fuse had failed and needed to be replaced. The vehicle was repaired. The contact's wife stated that while driving 55 mph after the repair, the vehicle unexpectedly shifted into neutral, stalled, and lost motive power. The vehicle was unable to restart. The vehicle was towed to another dealer, where it was diagnosed that metal shavings were found in the oil, causing the engine to seize. The contact was informed that the engine needed to be replaced. The contact associated the failure with NHTSA campaign number: 25v274000 (engine and engine cooling). The manufacturer was made aware of the failure on the manufacturer's website and by phone, and a case was opened. The approximate failure mileage was 72,850.

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Engine failed on this 2026 GMC Yukon denali. . It had only 18000 miles on it, it failed in middle of hwy in indiana. Got it towed to dealership. . They haven’t touched it since last 2 days.

This email is a continuation of complaint # 11760621 that I filled on August 29th 2026. The vehicle was authorized by general motors to have the engine replaced and the service department at the GMC dealer informed that the replacement engine was installed and failed immediately upon it's initial test drive. I have absolutely no faith in GMC's solution to the engine issues or the safety of the vehicle in the future with myself or family in it.

I own a 2021 GMC Yukon xl denali equipped with the 6. 2l l87 v8 engine. On September 10, 2026, we checked the engine oil and discovered that it was approximately two-thirds low. Mechanical inspection confirmed that the engine is consuming and burning oil internally rather than losing it through an external leak. The vehicle’s last oil change was performed in may 2026, and it is still more than 1,000 miles away from its next scheduled oil change. The vehicle provided no low-oil, low-oil-pressure, check-engine, or other dashboard warning, despite being severely low on oil and having its alerts enabled. I had no indication that the engine was operating with an unsafe amount of oil. I am concerned that the continued internal oil consumption could cause premature engine damage, engine seizure, or sudden loss of propulsion without adequate warning. I regularly use this vehicle to transport my young children. My VIN is not currently included in recall 25v-274, although my vehicle has the same model year and 6. 2l l87 engine involved in the ongoing NHTSA investigation. I am reporting this confirmed internal oil consumption and lack of driver warning so that problems occurring in currently excluded vehicles can be properly documented and investigated.

Update to original claim filed 11760897. Dealership inspected on 9/9/2026 and found engine damage severe enough to warrant a complete replacement. Catastrophic damage. Unspecified what caused the damage, but service advisor made me aware of a deep gash along the cylinder wall after removing the cylinder heads, unspecified cylinder. Likely from cylinder 3 where the code was being displayed- p0303. Vehicle was in the beginning stages of an oil consumption test and had a history of oil loss without any visible leaks. Add oil light came on 650 miles after oil change. Oil was likely being burnt up through combustion due to damaged cylinder wall. Unknown time for new engine to be installed. Estimated backlog 600 engines, could be regionally or nationally. Replacing engine at 29,800 miles, however vehicle has been having these issues much longer- closer to 20,000 miles. I want consumers to be aware this vehicle was not part of the national recall. Vehicle was manufactured in July 2024, two months past the recall date established for these gm engines.

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I own a 2022 Yukon the motor was recalled and was replaced at approximately 30,000 miles. Gm had my vehicle for over a month in 2025. Now I have 36,000 miles on my Yukon and my 2nd brand new engine has exploded and is currently being replace.

My 2021 Yukon denali received the recall 25v-274 oil fix and I am now experiencing an active light engine knock. My gas mileage has reduced significantly and I am having to add oil in between regular oil changes. Not only does it burn through oil and fuel faster but I now get charged an extra fee for "premium oil". My oil changes cost me roughly $40 dollars more now. ($140 instead of $100) I don't feel as if this fix with the oil change has improved anything and that the cost to maintain the vehicle has only gone up. I am still worried this vehicle will break down on my next road trip.

My vehicle was subject to the gm recall involving the 6. 2l l87 engine. The dealer completed the required recall inspection, determined that the engine passed, and performed the prescribed remedy for passing vehicles, which included changing to the specified higher-viscosity oil. After the recall inspection and remedy were completed, the engine subsequently failed. While driving on an interstate at approximately 70 mph, the engine failed without any prior warning lamps, messages, or noticeable symptoms. There was an audible warning tone and the instrument cluster displayed a message instructing me to restart the vehicle. I then noticed that the vehicle was in neutral and the engine showed no rpms or response when the accelerator was pressed. Pressing the start button did not restart the engine. When I attempted to select drive, the vehicle displayed a warning indicating that conditions were not sufficient to change gears. The sudden loss of engine power and propulsion while traveling at approximately 70 mph on an interstate created a significant safety risk to myself, vehicle occupants, and others on the interstate. The vehicle could no longer maintain speed with surrounding highway traffic and had to be navigated to a safe location without engine power. The vehicle was towed to the local gm dealer who diagnosed the vehicle with engine failure, stating the engine was seized and the oil filter was full of shredded metal. The vehicle is currently with the gm dealer waiting a replacement engine. I am reporting this incident because the engine failure occurred despite the vehicle passing gm’s recall inspection and receiving the recommended remedy. This raises concern that the recall inspection and/or remedy may not adequately identify or prevent engine failures. The potential inadequacy of the recall remedy is especially concerning from a safety standpoint.

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The car stopped without warning in the middle of a very busy highway that could have caused an accident. The car had to be drug onto a wrecker because the wheels would not turn to be loaded on tow truck. Towed to dealership and have been advised that the engine will have to be replaced due to engine failure. The were no noises, alerts or notifications from the vehicle prior to immediately stopping in the middle of the highway. This is 2025 vehicle with 23k miles.

See all problems of the 2025 GMC Yukon 🔎.

Our Yukon was taken in for the recall. Dealer did the test and said it passed and used different oil. My wife and kids were driving to [xxx] from [xxx] yesterday. As they exited the highway, the car began acting weird. Then the car completely died. It was towed due to error code p0016. Dealer said they are going to put a new engine in. I saw online that cars with replacement engines were failing too? information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Persistent lifter/valvetrain tapping noise, particularly around 1,500 rpm. 2022 Yukon 88,000 miles. Engine consumes more than 2 quarts of oil in between oil changes. Was told by dealer in the past that this was in normal range.

Engine seized up on the highway after recall was performed. I nearly avoided a wrecked getting it off the road. I had to wait over 5 hours for gm to tow me then ended up having it towed myself. Now the car is at the dealership with backordered parts, they agreedto pay for the tow now it seems to be an issue that I paid the to trcuk driver cash, & parts have no ship date. Gm customer servive agents are rude & do not seem to Ave any sence of care in the world about anything.

Engine stopped. Would not restart. I had it towed to dealership. They told me the engine is blown. There is only 7700 miles on the truck.

While driving my 2021 GMC Yukon denali with the 6. 2l l87 v8 on a high-speed highway near somers point, new jersey, the vehicle suddenly began bucking and the accelerator stopped responding normally. The vehicle rapidly lost propulsion while I was surrounded by highway traffic and approaching a bridge. I was fortunate to get the vehicle onto the shoulder before reaching the bridge. I was then stranded on the shoulder of a high-speed highway, where the disabled vehicle created a serious safety risk to me and other motorists. The engine shut down and would not restart. It initially cranked as though it was attempting to start, but it did not start. I received a diagnostic alert stating, “service the engine and transmission system immediately. ” the vehicle required a tow. The tow operator later reported that it appeared locked up and could not be shifted into neutral. The vehicle has approximately 77,000 miles and has been serviced regularly. Its most recent oil-change sticker indicated the next oil service was due at approximately 81,000 miles. While safely pulled over, I checked the engine-oil dipstick and confirmed that the engine had oil, with oil visible across the dipstick’s normal measuring area. Despite this vehicle having the 6. 2l l87 engine and experiencing a sudden loss of propulsion and no-start condition, its VIN does not currently appear in gm’s public recall lookup for the existing l87 recall. The vehicle is being transported to an authorized GMC dealer, and the precise failed component has not yet been confirmed. This sudden loss of propulsion created an immediate risk of a serious highway collision, particularly because it occurred immediately before a bridge. I understand NHTSA is investigating continuing l87 engine failures, including failures involving vehicles outside the original recall population. I am submitting this complaint so this incident is formally documented and considered as part of that investigation.

My vehicle was with ancira GMC boerne for approximately three weeks where they replaced the transmission control system/module, the centralized onstar module, and diagnosed both rear screens for replacement. Approximately one month after getting it back, at only 49,800 miles, I experienced a complete loss of propulsion. The vehicle shut down while I was driving. Given the recent transmission repair and the fact that this failure occurred while the vehicle was in motion, I no longer have confidence in the safety or reliability of this vehicle. I have young children riding in this vehicle daily and I’m not comfortable accepting another repair and simply being told it’s safe to drive.

After engine passed check for possible replacement because of recall, engine failed 5000 miles after. Even though I have a new engine now, there is no warranty coverage other than the lower part of the engine. I am already having misfire issues.

While traveling at highway speeds of approximately 82 mph in a 2026 GMC Yukon denali (6. 2l v8 l87 engine), the engine experienced a sudden, catastrophic internal failure and completely seized without warning. This resulted in an immediate, total loss of motive power, power steering assist, and power braking assist while surrounded by high-speed traffic. The sudden deceleration and lack of vehicle control created an extreme, life-threatening safety hazard, forcing an emergency maneuver across multiple lanes to reach the shoulder. Stranded on shoulder at night(pitch black) with lots of 18 wheelers passing.

The contact owns a 2017 GMC Yukon xl. The contact stated that on several occasions while driving at various speeds, there was a loud ticking and tapping sound coming from the engine compartment. The vehicle was taken to two independent mechanics, where it was diagnosed and determined that there was a lifter failure caused by the afm system and an engine misfire, and that the lifters, camshaft, and timing chain needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 137,000.

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Pico scope test #fdyz295894391 on engine for recall #n252494003 engine , passed test. Drain oil filled with 0-40 replaced oil cap. Date 09/19/2025, mileage in 20142/mileage out 20142. Vehicle runs rough. Not stable at times. Vibration noise coming from the motor at times.

Vehicle has been consuming engine oil at a rate of approximately 1 quart per 500 miles. On xxx, owner added 1 quart of oil in [xxx], then drove a round trip to [xxx] and back (approx. 860 miles). On xxx at 55,329 miles — only 9 days and roughly 860 miles after that quart was added — an oil change was performed at an independent shop; the technician noted no oil was present on the dipstick prior to service. On xxx at 55,829 miles — exactly 500 miles later — the vehicle was taken to an authorized GMC dealership, and the dipstick again showed no oil prior to service. The dealer began the manufacturer's oil consumption test protocol, performing an oil and filter change and other maintenance. Within approximately 74 miles of this service (current mileage 55,903), the engine began making an audible knocking noise. Oil level was checked and confirmed full/normal, ruling out low oil as the cause. The knock has been intermittent — not present at cold idle start, but returning during driving conditions, raising concern about potential engine failure or loss of power while driving. They can not get it back in till xxx. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2021 GMC Yukon began experiencing severe engine problems, including shaking/rough running, a noticeable ticking/knocking noise from the engine, and a flashing check-engine light. The vehicle also displayed service esc and traction control warnings and exhibited symptoms of an engine misfire. I took the vehicle to a dealership for evaluation. I was advised that the problem may involve failed lifters and that the vehicle could be out of service for several weeks for repairs. I was also advised that the repair could be very costly. At this time, I have not been given a final diagnosis, so the exact internal engine component responsible for the failure is unknown. I am concerned that the condition presents a safety risk because the engine is running extremely rough and the check-engine light is flashing. I am afraid the engine could lose power or fail while the vehicle is being driven, potentially putting me, my passengers, and other motorists at risk. I have also become aware of NHTSA's investigation involving failures of the 6. 2-liter l87 v8 engine in gm vehicles, including the GMC Yukon, as well as reports of engine failures occurring after certain repairs or recall remedies. This has increased my concern about whether repairing or replacing individual engine components will permanently resolve the problem. I am submitting this complaint so that my vehicle's symptoms, dealer evaluation, and potential engine failure are documented. The vehicle and affected components are available for inspection upon request. The dealership has evaluated the vehicle, but a final determination of the exact cause has not yet been provided.

L87 engine already replaced under recall. Failed with same issue in the middle of the road after making heavy squeaking noise.

The engine issue was caused by a misfire in cylinder #5, which resulted in white smoke coming from the vehicle’s exhaust. While driving on the highway, the vehicle lost power and would not accelerate properly, creating a serious safety hazard due to the inability to maintain speed and safely respond to traffic conditions.

I got a Yukon at4 and I had to replace it for the one with this VIN number [xxx], the first one had a problem with the engine and the offer me to change it for a new one and accept it but since then it has given me problems, at first it was a small pull that felt, then an engine problem, that they "fix" and I have to come back because the " pull " still existed, they fixed it, and after around 3 months after, I had a an engine light one , collision light on, and esc light one, took it to the dealer and it was something related with the engine again. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Filing as a proactive data point for the ongoing NHTSA office of defects investigation engineering analysis (ea26005) regarding gm 6. 2l l87 engine failures. Vehicle is a 2026 GMC Yukon xl at4 equipped with the 6. 2l v8 and 10-speed transmission. The vehicle currently has approximately 2,800 miles and operates perfectly with no mechanical symptoms, ticking, or loss of propulsion. As an active preventive measure against internal component contamination, early engine oil changes were performed at 700 miles and 1,700 miles by a certified franchise dealer (alpine Buick GMC). The engine continues to use the factory-specified 0w-20 oil viscosity. A magnetic oil drain plug has been installed to monitor for premature ferrous bearing and crankshaft debris at future service intervals. This report is submitted to ensure 2026 model year data running 0w-20 oil is officially documented within the federal investigation scope.

My 2021 GMC Yukon denali with approximately 88,000 miles developed a significant engine knocking noise and was towed to a GMC dealership for diagnosis. The dealership confirmed diagnostic trouble code p0301 (engine misfire) and documented a “knocking noise in lower end at piston rod crankshaft area. ” the dealership advised that my vehicle is not currently included in the existing gm recall for certain 6. 2l l87 engines. The vehicle has the 6. 2l l87 v8 engine. I am concerned because the documented knocking is located in the lower engine area involving the piston/connecting rod/crankshaft area, which is consistent with the type of internal engine failure associated with the l87 engine investigation and recall. I am concerned about the possibility of sudden engine failure and loss of propulsion while driving. I am requesting that NHTSA investigate this failure and consider whether vehicles outside the current recall population should also be included. I also recently experienced an engine replacement on another 2024 GMC vehicle. I am providing that information as additional customer experience, but I am not claiming that the two failures are necessarily caused by the same defect.

I was driving on the northeast extension at roughly 70 mph in the passing lane and my car lost forward power and went into reduced acceleration mode. The check engine light is on, violently shakes when parked, with additional dashboard notifications saying service esc, service traction control, and forward collision system unavailable. I had my engine replaced in September due to the recall.

Yukon would not idle without turning off on its own. Check engine light came on. Took it to my mechanic. Check engine light was flashing which indicated an active misfire. A running compression test found little to no compression from cylinder 6. Further investigation found that cylinder 5 had been repaired in 2022. Mechanic recommends engine replacement.

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Had a check engine light come on a couple months ago and vehicle went into reduced accelaration safety mode. Come to find out, it was a faulty valve body. I came out of pocket for $2,800 to get it replaced because GMC said the valve body/special coverage was not assigned to this VIN. Even though it was a 2022 with 60,000 miles on it fitting every criteria of the exact recall (mind-blowing). Now fast forward to now, the same check engine light and reduced acceleration fault is active associated with a transmission control module fault. This truck is entirely too new and taken care of to be dealing with these types of major issues. It’s been a severe inconvenience for my wife as it’s her daily driver. To make matters worse, the lack of support and assistance from GMC has made us go from very loyal customers and supporters, to now seeing how quickly we can get away from this disaster of a vehicle and customer service.

The contact owns a 2021 GMC Yukon. The contact stated that while pulling into a parking space at an undisclosed speed, the vehicle stalled. The contact associated the failure with NHTSA campaign number: 25v274000 (engine and engine cooling); however, the VIN was not included in the recall. The vehicle was towed to a dealer, where it was diagnosed that the fuel pump control module had failed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 81,000.

Engine shut off with no warning, all electronics disabled and couldn't shift out of park. Was driving down the road at approximately 50mph, Yukon shifted itself into neutral. Vehicle previously complied with the 25v-274 recall and passed, was operating on the new oil that gm recommended.

Lifter/camshaft/engine failure. Gm knows this is an issue with these models/years. They only want to cover half of the repair sticking me with a bill for $5600. Safety is a concern because they know this is an issue and not issuing a recall currently. I was driving when this happened which could have caused me to get into an accident. Very dangerous. Car is currently as GMC started by showing low oil in between oil changes last year. Went in for an oil change and told them about it. Dealership told me it was the air hose box and that they didn't see any other issue. I believe they are told to lie to get each customer further out of warranty. I was driving and all of a sudden the car started violently shaking and lights started flashing at me.

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.