Power Train Problems of GMC Yukon - part 2

Vehicle lost power on highway with my sons family in the car. Vehicle was towed to dealer from which it was purchased . Outcome was the motor failed and a remedy could be months out with gm only offering a 35/a day rental from enterprise which no vehicle that compares can be rented at that cost.

Monday, March 30, 2026 my GMC Yukon denali had already had the recall pico test and was told it passed on September 2025 six months later March 30, 2026, driving to pick up my wife from work a tapping sound coming from the engine started and about a mile down the road from when I first heard the tapping the engine started juttering and the noise got louder like a clunking sound. I had to pull off the road into a gas station and use the onstar to get assistance the vehicle was towed to a local san antonio dealership cavender Buick west they gave me a loaner vehicle the next morning and the day after that Wednesday I was informed that yes they confirmed the engine will have to get replaced so now I am waiting for that. I was told by the dealer it could take up to two months for them to receive a replacement engine and once they receive the engine, it can take roughly for maybe five days for turnaround. I inquired whether the replacement engine isn’t upgraded engine or is it the same engine that has all the problems I haven’t received an answer for that yet. I am awaiting that answer from my service advisor. He said he is looking into that.

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My car lost all power on a bridge and started jerking me forwards and backwards. High rpms and eventually lost reverse. Code number p0777. Seems aligned with the newest transmission recall, but my VIN is not listed.

While driving on the interstate at highway speed, the vehicle suddenly lost acceleration and stalled. I was forced to pull over. After stopping, the vehicle displayed a message to restart, but it would not start. All electronic accessories (lights, dash, etc. ) remained functional, but the vehicle would not shift into drive or neutral. The message “conditions not correct for shift” appeared. Nearly rear ended, this created a dangerous situation due to loss of power in active traffic and inability to move the vehicle on a 250,000 vehicle per day very busy tollway.

I purchased my used GMC Yukon from a used car dealership 3/28/26. I signed the papers for the agreement while I was driving the vechicle home I lost power and it wouldn't go forward with gas applied. The check engine light came on, I pulled the SUV over and it was towed. The code that popped up 0700 and 02723 both codes having to do with the transmission.

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The contact owns a 2021 GMC Yukon xl. The contact stated that while driving approximately 70 mph, the vehicle started shuddering and was losing automotive power. There was no warning light illuminated. The vehicle was taken to an independent mechanic to be diagnosed, and it was determined that the transmission needed to be replaced. The contact stated that it was the second transmission failure in less than 2 months. The vehicle was repaired. The contact was advised by the mechanic that the manufacturer had recommended a diagnostic test on the engine. The diagnostic test had not yet been performed. The manufacturer was informed of the failure. The failure mileage was approximately 64,000.

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The 6. 2l motor in my GMC Yukon failed due to the camshaft and stalled me in an intersection on a highway. Had to shut the lanes down to get towed. Lost all power and couldn’t do anything but sit in the road. Just did a pico test and it “passed” but failed 3k miles after the recall was done.

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I took this vehicle in for the recall that gm had indicated. The vehicle was taken to a GMC dealer and “passed” the pico test and the oil was changed out as recommended. Two weeks ago, the engine completely seized while driving in the interstate and was towed back to the dealership. I am now waiting on engine replacement after passing their solution. The car has roughly 30,000 miles on it.

My transmission control valve failed while I was driving causing my speed to reduce on a high speed high. I know longer could go in reverse, about 35mph or above 2nd gear. This is a known issue on the 10 speed transmission for 2022 Chevrolet tahoe, suburban, GMC Yukon however my VIN number was not included in the recall but it happened to me. This was a terrifying situation and I am so shocked as to why my vehicle was not included in the recall to begin with.

From the time I got my 2024 Yukon denali I have had problems with the electrical systems not working, it was in the shop for 2 months upon delivery to me when it was brand new, and since then I have had issues with the engine racing, the start button not working, or cutting off and on , on its own, recently the motor cuts on but never turns over. It has been in the shop again for over a week now and they replaced the engine control module and it is still doing the same thing. The dealership is now telling me its a wiring issue causing it. It has been something the entire time I have owned it. I paid 90k for a vehicle that has major issues. I am looking into the lemon law in my state of nc, and filing a complaint with GMC to see if I can get a replacement vehicle or traded.

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On 3/14/26, on I-75 in troy, michigan at 70mph the vehicle, with 4000k miles on the odometer completely shut off. I pushed to restart the engine and it would not restart. My whole family was in the car and we were on a curve. I was able to coast to a flat shoulder. The vehicle would not restart or shift out of park. Onstar took seven hours to tow the vehicle. The dealer is installing a new l87 6. 2l engine. I do not have the vehicle back yet. I received an economy car as a loaner. The dealer says gm will not extend the factory warranty despite the engine replacement. My family could have been easily killed.

I own a 2023 GMC Yukon denali. In Nov. 2023, at about 4,000 miles, the vehicle suffered a complete engine and electrical failure at highway speed while I was traveling with my husband and three small children. It suddenly lost all power in the fast lane, including acceleration and engine function. Steering became extremely heavy, consistent with loss of power steering assist, and the electronics shut down. We had to guide the vehicle across traffic while coasting downhill to the shoulder beyond a guardrail. Traffic had to avoid us, creating a serious safety hazard. The vehicle would not restart. The vehicle was towed and required a complete engine replacement under warranty. After that replacement, additional issues followed. There was an hvac/defrost concern. In June 2025, the vehicle again became inoperable without warning while parked at a store. It would not start despite repeated attempts, including by a dealership representative. A diagnostic scan produced over a page of error codes, but the dealership could not identify a cause and stated the vehicle was safe. In Dec. 2025, the vehicle engine was inspected under a recall and I was told there were no issues. In Feb. 2026, the vehicle lost heat and was found to have no coolant despite regular maintenance and recent inspection. In Mar. 2026, at about 37,700 miles, the vehicle developed a loud clunking noise while driving. I stopped driving and returned it to the dealership, where I was told the engine had failed again and required another full replacement. The vehicle has now had two engine failures and three engines installed in less than three years. There were no warning lights or prior indications before these failures. I no longer believe this vehicle is safe or reliable for transporting my family.

While driving my 2022 GMC Yukon with approximately 150,000 miles, the engine suddenly began running rough and I immediately pulled over. The vehicle had to be towed to the dealership. The dealer diagnosed a collapsed lifter and camshaft damage and recommended full engine replacement at a cost of about $9,450. The vehicle had no prior engine issues and most miles are highway miles. Sudden engine failure while driving creates a potential safety hazard due to loss of power. I am reporting this because I understand there are ongoing investigations into gm v8 engine failures and I believe this failure may be related.

I just survived a terrifying incident that proves the current gm 6. 2l (l87) engine "recall fix" is a dangerous myth. Living with the "ticking time bomb" I bought my 2023 GMC Yukon at4 brand new, but for the last two years, I haven't truly "owned" it—it has owned me. Every long-distance trip with my family was filled with anxiety. I constantly worried that I’d be the next one stranded on the side of the road while my neighbors' and friends' 6. 2l engines were seizing all around me. I traveled with fear that I’d be coming home in a rental car. The false security of the recall when the recall finally arrived, I thought the nightmare was over. On sept 15, 2025, my dealer in newburgh, NY, inspected the truck at 48,000 miles. They told me my engine "passed," switched the oil to 0w-40, and issued me a 150,000-mile extended warranty. I realized then what I know for sure now: 0w-40 oil is a band-aid, not a cure. Gm used thicker oil to "cushion" a physical manufacturing defect in the crankshaft and bearings just to avoid the multi-billion dollar cost of engine replacements. They traded my family’s safety for their bottom line. The catastrophic failure last Friday, March 13, 2026, the "fix" failed. I was traveling 70 mph uphill on I-84 with my **newborn baby** and two other kids in the back. Without warning, the engine seized solid. I lost all propulsion in heavy traffic and had to fight to get my children to the shoulder. We sat in the freezing cold for over an hour while traffic flew by us. An extended warranty is worthless when your engine dies in a high-speed traffic lane with an infant in the car.

While driving I had a sudden loss of power. Contacted dealership and was ask for engine code light. Told them no light had appeared on dashboard. Did note intermittent shift changes while driving after this occurrence. Transmission and or engine feels like it has a studder. Concerning.

I was pulling out of my driveway when I noticed that my mailbox was blown open from a recent storm. I stopped and put it in reverse (well tried to) but the vehicle would not shift. Quickly I continued to drive to make a u-turn instead and at that point my vehicle would not drive normally. The rpms would not go up despite pressing the gas and the engine was reving very high. Gm dealer said $700 to pull the transmission to determine the issue, but after my research I’m certain it’s the valve failure in the transmission just as it’s done the same to others. Why is this transmission not recalled, but the disel engines on the same model are? seems as though it is a similar issue. I’m afraid to see what they will charge me as my vehicle has 76,000 miles and I’m told is outside warranty coverage.

My 2023 GMC Yukon denali with the 6. 2l v8 suffered a sudden loss of propulsion while traveling at approximately 70–75 mph on the highway with my wife and young daughter in the vehicle. The engine rpm dropped immediately to zero and the vehicle displayed a message instructing me to press start. I do not recall any meaningful prior warning lamps or symptoms before the failure. I did not hear a loud bang or other dramatic engine noise; the vehicle simply lost power and would not continue driving under engine power. I had to coast across lanes/shoulder to a stop, which created a serious safety risk to my family and other drivers because the vehicle lost propulsion at freeway speed without warning. After stopping, the vehicle would not restart. Pressing the start button produced only a click from under the hood and the engine would not crank. The vehicle was towed to a GMC dealership in victorville, California. The dealer has since confirmed that the engine requires full replacement. The failure has therefore been confirmed by an authorized GMC dealer and the vehicle should be available for inspection through that dealership/manufacturer if requested. This is especially concerning because this vehicle was already part of the known gm 6. 2l recall population and had supposedly passed the recall inspection/remedy before I purchased it. Despite that, the engine still failed catastrophically only about 1,355 miles into my ownership. Purchase mileage was approximately 26,343 and failure occurred at approximately 27,698 miles. Based on what the dealer told me, the failed component/system is the engine assembly.

2023 GMC Yukon xl 6. 2l v8 experienced progressive engine defects starting in first year. At 7,445 mi (Jan 2023), first dealer visit for engine issues. At 10,315 mi (Apr 2023), cyl 2 fuel injector failed (internally open), vehicle towed to dealer, replaced under warranty. At 14,982 mi (Aug 2023), identical cyl 7 injector failure (internally open), replaced under warranty. Two identical failures on different cylinders within 15,000 mi indicates systemic defect. By 30,409 mi (Aug 2024), dealer performed engine decarbonization due to carbon buildup from fuel injection issues. Dealer recommended additional decarbs at 38,077 mi and 42,577 mi. At 56,028 mi (Mar 2026), engine suffered catastrophic failure: piston ring failure causing excessive oil consumption and engine destruction, requiring full engine replacement. This matches gm's known 5. 3l/6. 2l v8 piston ring defect (subject of $150m class action settlement). Defective injectors caused incomplete combustion, carbon buildup on piston rings, ring tension loss, and catastrophic engine failure. Vehicle also has unfixed suspension defect (camber bolt/alignment). Vehicle visited dealer 8+ times. Engine failure poses serious safety risk from sudden power loss at highway speeds. Vehicle available for inspection.

The 2020 Yukon started to have serious loss of speed and decelerating issue when the vehicle would slow down and down shift to a lower gear. The issue with this is that once it downshifted it woul not engage in a gear again and leave me stranded on the road. I had to turn off the car and restart it for it to reengage in a gear enough to get it moving again and sometimes I had to try more than once to get it moving once it no longer wanted to engage in a gear. So in the 10 mile drive, I was left stranded at least 15 times. Each time I had to restart and restart again for the vehicle to engage in a lower gear. Once moving, it would sometimes it would engage in a higher gear and sometimes it would not. Thank goodness I wasn't traveling on the highway when this happened. Beware to anyone if this was to happen on the highway while in the middle lane while in traffic. And the check engine light never turned on and thus no code to help detect the issue. Took it the day before to have it looked at and was told nothing was wrong with it since there was a code and they could not duplicate the issue I described. What?? they reset some transmission computer setting but it only made it worse by the next day. Now this 6 yr on 2020 gm Yukon is at the dealership service department requiring a new transmission for $7200. Said that the transmission fluid was showing particles of stuff and color was 'burnt', I think. Transmission fluid was changed at it's regular check up time so that didn't cause the issue and nor should it have bits and pieces in it and discolored. Is there any recourse to gm and it's crappy transmissions??.

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I was driving down the road and my vehicle went into limp mode, and I had reduced acceleration. I got to my destination then could not reverse the vehicle out of the parking space, reverse would not engage and allow me to have acceleration power. Because the parking space was on an incline we could roll backwards then drive forward, in limp mode, to a nearby mechanic. The vehicle diagnostic codes they got were: no reverse, p0700, p0776 and p18a1. They told us the repair needed would be to remove and replace the valve body assembly for $2,862. 40. There were no warning lights that came on prior to the incident. Once the vehicle went into limp mode the check engine light came on. We had a chevy dealer and got a second opinion at a transmission shop to check the transmission in December 2025, because we were concerned about a possible hard shift when shifting vehicle from park to drive, but both places concluded there were no problems. We now have had it towed to a transmission shop for a second opinion. It is available for inspection. We see a recall issued to other 2022 GMC Yukon xl that does not come up when we put our VIN # in, but could possibly apply to our vehicle too is recall #: n252536750.

2019 GMC youkon with 94,659 miles. I am the second owner of this vehicle. I purchased it used in February 2025. Check engine light came on in route to work on March 5, 2026. Immediately took vehicle to auto zone to scan for codes. Multiple codes were returned. I drove it directly to a repair shop for further diagnostics. Return results were massive lifter failure and cam shaft damage. Why would the check engine light not come on sooner to prevent total failure. Vehicle was towed to a GMC certified mechanic where it was confirmed that all lifters and cam shaft were damaged beyond repair and must all be replaced. Estimated cost of repairs so far: $8,596. 80 labor: remove & replace left and right valve lifter (both sides) coolant service oil change labor parts: engine camshaft 1 , genuine gm engine valve lifter oil manifold gasket 1 , genuine gm fuel pump gasket 1 engine timing cover gasket set 1 engine valve lifter guide 1 engine valve lifter guide 1 coolant/antifreeze orange dex-cool 1 gal 3 engine push rod 8 engine oil filter 1 0w-20 full syn 8 engine cylinder head bolt set 1 engine valve lifter guide 1 engine valve lifter guide 1 stock engine valve lifter 4 stock engine valve lifter 4 engine cylinder head gasket kit 1 engine cylinder head bolt 10 approved subtotal $8,422. 71 + est. Tax $174. 09 $8,596. 80 estimated time for repair: going on three weeks.

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On 3/3/2026 during the night-time hours, I was traveling on the freeway in my 2023 GMC Yukon at over 65 mph when I received a notice from the instrument cluster stating that the battery was low and oil pressure was low. Before I could pull over to a safe location, the Yukon turned off while in motion. My wife and two children were in the vehicle. The Yukon stalled in the number one lane of the off-ramp. I had to remove my children and wife from the vehicle while in the roadway on busy throughfares and in darkness. I attempted to jumpstart the Yukon, but efforts were unsuccessful. The Yukon was towed to the dealership where I purchased it purchased from. The Yukon was returned to my custody on 3/10/2026 stating it was an issue with the battery. While driving the Yukon home it began to bog down and stalled out in-front of my residence as it was being driven by my wife. After arriving home (night-time), I went to check the Yukon, and it started with no issues. I drove the Yukon to see if the errors would occur again. While driving the Yukon on the freeway, the Yukon rmps indicated close to redline and I received a notification from the instrument cluster stating to turn the vehicle off (traveling at about 70-75 mph). Once again, I was unable to pull off to a safe location before the Yukon turned off on its own while still in motion; I attempted to jumpstart the Yukon but attempts were unsuccessful. The Yukon was towed again to dealership. On 3/11/2026 I was advised that the engine had seized and on 3/13/2026 I was advised by GMC the engine needed to be replaced (this was covered under powertrain warranty). The approximate milage of the vehicle is at about 42,200.

During normal driving conditions the vehicle had set code p18a1 in the ecm. Code set due to an internal short in one of the solenoids in the valve body assembly. This caused the vehicle to display "limp mode" and lose reverse gear and propulsion over 45 mph. The vehicle was parked and towed to the dealership for evaluation. Upon inspection by a certified dealer technician, it was found that a solenoid had failed and required replacing. As part of the entire valve body, the solenoid is not a serviceable part. The dealership had to replaced the entire valve body assembly per repair guidelines. Per the gm and NHTSA websites, my 2022 GMC Yukon XLT with a 10-speed transmission is not included in the recalls listed below even though the symptoms are identical. General motors publicly acknowledged the 10?speed transmission valve body and solenoid defects, including internal electrical and hydraulic failures, through safety recalls, special coverage programs, and technical service bulletins applicable to 2020– 2022 full?size trucks and suvs, including the GMC Yukon. My vehicle’s model year, transmission type, failure code (p18a1), and repair align with those documented gm conditions and should be included in this recall.

Transfercase was casuing the Yukon to serge when in auto mode. No codes warning lights were presented. The dealer did not find any codes but when the transfer case was removed the oil was drained to which metal shavings were found in the oil. After getting the Yukon back the transmission began to exibit the same type of issues. Currently the Yukon is back in the shop.

The 8-speed automatic transmission (hydra-matic 8l90) on this 2017 GMC Yukon slt 5. 3l v8 has failed. This is a repeat failure — the transmission was previously rebuilt in 2020 under a gm recall/service action for the same known defect affecting this transmission type. The transmission has now failed again in 2026, approximately six years after gm's prior repair. Prior to failure, the vehicle exhibited hard shifting, shuddering during acceleration, and hesitation between gear changes — symptoms consistent with the known defect pattern documented across 2015–2019 gm vehicles equipped with this transmission. The failure was confirmed by a service center. The vehicle is currently not safely drivable. Safety concern: erratic and unpredictable gear changes, including sudden lurching and hesitation during acceleration, create a dangerous condition for the driver, passengers, and other vehicles on the road. Gm has been contacted through their customer assistance center (case opened). Gm's initial position was that they cannot assist because the vehicle is out of warranty. However, this is a repeat failure of a previously repaired known defect. Gm issued 13+ technical service bulletins on this transmission and has been aware of the root defect since at least 2018. A federal class action (speerly v. General motors, e. D. Michigan) covering this exact vehicle type and transmission has been certified and upheld by the sixth circuit court of appeals. The prior gm repair did not remediate the underlying defect.

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2026 Yukon elevation with 3,957miles. I was driving down the road and pulled into the turn lane at an intersection. Vehicle cut off with the auto start/stop function and would not start back up. I continued and tried to restart the vehicle but would not start; I was blocking the lane with cars continuously going around me. Vehicle stated service transmission on the display- I was unable to put it into neutral to push it out of traffic; you are only allowed to put it into neutral when crank and couldnt get the accessory mode to come on without the vehicle trying to start. I called the local police department and they sent an officer to direct traffic until a tow truck showed up. Both observed the vehicle not starting. There were no symptoms prior to the vehicle cutting off, only once auto start/stop initiated did the vehicle not restart. Vehicle will be sent back to the dealership tomorrow to resolve this issue. I have dash cam footage of the incident and photos of the display on the screen.

On [xxx], my 2022 GMC Yukon denali xl (VIN [xxx] ) experienced a complete loss of propulsion while I was driving on [xxx] in el paso, texas, with my wife and two young children in the vehicle. Mileage was approximately 50,364. While in motion, the vehicle was displaying abnormal behavior, concerned the vehicle would stall on the highway, I exited at the geronimo exit. As the vehicle slowed, it shut down entirely. Multiple restart attempts failed. The dashboard cycled on and off, displaying a "service 4wd" warning while the vehicle was in 2wd mode. The transmission locked, and the vehicle became inoperable in the middle of the roadway with traffic passing on both sides. Onstar sos was activated to communicate the unsafe location. The el paso police department was requested to divert traffic. A city tow vehicle arrived after approximately fifteen minutes; my family was assisted across the roadway. Roadside assistance did not arrive for approximately three hours. This was the second loss-of-propulsion event on this vehicle in less than twelve months. The first occurred in March 2025 and resulted in engine replacement under NHTSA safety recall 25v274 (l87 engine loss of propulsion). The [xxx] failure occurred after the recall remedy had been applied and the engine was replaced. The vehicle was towed to the dealer who replaced the throttle body, intake air duct and a service item titled "repair open ground circuit". I am filing this report to document a second loss-of-propulsion event on a vehicle that already received the remedy under recall 25v274, and to ensure NHTSA has visibility into the potential pattern of recurring or inadequate remedy on the l87 platform. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I had taken care of the recall items in regards to the failing 6. 2l engine. I was driving on the highway (going ~70mph) when all of a sudden the car kicked into neutral and the engine shut off. I was able to pull over, but the engine would not turn on. Electronics worked, but I think I had a total engine failure at 42k miles.

Driving 70mph on highway when engine suddenly failed. Engine turned off and kicked into neutral. Had to pull over on busy highway in a powerless car and have car towed. It is now getting a full engine replacement at 42k miles.

My 2021 GMC Yukon suffered the same engine failure that is the subject of the recall. It has just over 70,000 miles. I'm now told I need a new engine. The dealer confirmed that this is the same issue that has impacted other similar vintage Yukons.

Transmission surging. Transmission stays in one gear.

The contact owns a 2013 GMC Yukon. The contact stated that while driving approximately 65 mph, the rear tailgate opened independently. The failure had occurred on several occasions. The battery warning light was illuminated. The contact stated that while driving at approximately 55 mph, the vehicle lost automotive power. The contact pulled over to the shoulder lane and attempted to shift to park(p); however, the vehicle failed to shift to park(p). No warning lights were illuminated. The vehicle was towed to a dealer, where it was diagnosed that the transmission needed to be replaced. The vehicle was repaired. The vehicle was taken to a dealer to be diagnosed; however, the dealer stated that the failure of the battery light being illuminated was unknown. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

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The contact owns a 2022 GMC Yukon xl. The contact stated that while driving approximately 45 mph, the vehicle jerked as if the brake pedal was depressed and failed to accelerate as intended, with the check engine warning light illuminated. The message "reduced acceleration - drive with care" was displayed. The contact stated that when the vehicle was stopped, the gear shifter was shifted into reverse, but the vehicle failed to respond. The vehicle was towed to the dealer, where it was diagnosed, and determined that there was a failure with the transmission valve. The contact was informed that the transmission valve needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 90,000.

The contact owns a 2021 GMC Yukon xl. The contact stated that while his wife was driving approximately 30 mph, the vehicle started to lose motive power with the message "service transmission now" displayed. The driver was unable to shift the vehicle into reverse(r) and turned around and returned to the residence. The contact and his wife researched online and found that there was a recall for the transmission for the year and model under NHTSA campaign number: 24v797000 (power train). The contact had the vehicle towed to a dealer, who diagnosed the vehicle and determined that the transmission valve body had failed and needed to be replaced. The contact discussed the recall and was advised by the dealer that the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 70,000.

The contact owns a 2022 GMC Yukon xl. While the contact’s wife was driving at an undisclosed speed, the vehicle unexpectedly went into limp mode, and the check engine warning light illuminated. The vehicle failed to accelerate to exceed 30 mph. The vehicle was taken to the dealer, where it was diagnosed, and it was determined that the transmission valve body had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA hotline for assistance. The approximate failure mileage was 65,000.