2021 GMC Yukon complaints

The power steering went out. The dealership said it's the rack and pinion. This part is not available anywhere in the United States. I have been waiting over 3 weeks. I feel the part is unavailable as there is an issue with the rack and pinion and others who have the same vehicle ran into the same problem.

The contact owns a 2021 GMC Yukon. The contact stated that while driving at slow speeds from 2 - 30 MPH, the vehicle hesitated and bucked while accelerating and switching between 4- and 8-cylinders operation. The vehicle was taken to the local mechanic who installed a part used to override the engine cylinder mode, and the engine only operated using 8 cylinders. No further information was available. The manufacturer and local dealer were not contacted about the failure. The failure mileage was 102,000.

Seems to be not accelerating properly as if the propulsion is not there. Also, when switching gears it seems as if it is slipping or missing to keep up with the propulsion. Lastly, riding with windows down on the highway alongside the concrete median, I can hear like metal clanking or rubbing against one another. Also, I get an oil change at George Ballas GMC on [XXX] and 3 weeks later truck says change oil soon. AND YES THEY RESET THE OIL LIGHT AND I DROVE IT FOR 3 WEEKS AND THE LIGHT POPPED ON!!!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormal sound and failed to accelerate above 25 MPH. No warning light was illuminated. The vehicle was taken to an independent mechanic, who determined that there was metal in the engine and that the engine needed to be replaced. The vehicle was then taken to the dealer, where it remained for eight months before the engine was replaced. The manufacturer was made aware of the failure. The failure mileage was approximately 127,000.

The contact owns a 2021 GMC Yukon. The contact stated that the vehicle failed to start. No warning lights illuminated. The vehicle was towed to the dealer, where it was diagnosed that the fuel pump module needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure, and a complaint was filed. The failure mileage was 59,800.

I bought the vehicle used with 40,000 miles it’s has 100,856 now the engine shot off while I was driving and brought it to the GMC dealer that GM instructed me to the dealer had me pay 284.95 for inspection and then try to charge me 1284.95 for a complete tar down of the engine because of misfiring and ESC error codes.

Transmission abruptly failed after only 110k well maintained miles

Engine overheated and performed an emergency shutdown while driving through Atlanta on my way to vacation with my family. We lost propulsion and had to cross 5 lanes of traffic to find a shoulder to pull over to. The engine shut down and we were left stranded 500 miles from home with our 3 children in a boiling car. The vehicle was inspected and passed the recall test 6 weeks prior to this incident. After the first failure we attempted to extend our power train warranty to which we were told it had too many miles by GM. The GM dealership and service center where the vehicle was towed confirmed the engine needed to be replaced and GM confirmed it falls under their extended warranty. However, GM refuses to cover any additional expenses incurred from their engine failure.

Engine failure causing vehicle to be unsafe to drive. our vehicle was not included in the L-87 loss of propulsion GMC recall even though it is a 2021 Yukon 6.2L. the engine failure is same as those being recalled. vehicle is currently at Cardinale GMC in Seaside CA waiting repair. the only warning of the impending failure was loud noises coming from engine compartment while driving on the freeway. Cardinale confirmed the problem and our extended warranty is covering repair costs. it seems that GMC should have included our VIN in the recall.

The driver's seat inboard airbag assembly and internal structural wiring harness failed due to a direct short circuit, completely deactivating the vehicle's supplemental restraint system. General Motors has a known engineering bulletin for this issue (#23-NA-085), noting that sharp internal seat frame components slice the airbag wiring harness. Rather than permanently fixing this structural design flaw while under warranty, dealership technicians repeatedly executed temporary, non-compliant field patches, including plastic zip-ties and Velcro tape inside the cushion. These temporary patches continuously failed, leaving the airbags disabled. Furthermore, the vehicle was sold under "Certified Pre-Owned" designation with an active, uncompleted 2020 manufacturer Customer Satisfaction Program Campaign (#N202310850-02) for this exact airbag circuit defect. Component failed & available for inspection: The driver's seat inboard airbag assembly and internal structural wiring harness failed due to a direct short circuit. The components are available for inspection inside the vehicle at the servicing dealership. Safety risk: Safety was put at extreme risk because active Diagnostic Trouble Code B14DC completely deactivates the airbags. This means the airbags may fail to deploy in a collision, leaving the driver completely unprotected in an accident. Confirmed by dealer: The problem has been explicitly reproduced and confirmed by an authorized franchise dealership across seven separate se

Took my vehicle in for general maintenance upkeep (oil change, tire rotation, vehicle inspection) and was notified my engine is already showing signs persistent with the recall on the 6.2L L87, specifically not holding oil. The dipstick was not showing signs of any fluid being in the vehicle.

1. Component / System Failed: The Supplemental Restraint System (SRS) / Driver’s Inboard Seat Airbag circuit has chronically failed, leaving the vehicle's primary safety restraint systems disabled. The faulty components and the physical service records documenting the failure are fully available for inspection upon request. 2. Safety Risk: The driver's safety and the safety of passengers are put at extreme, immediate risk. Whenever this failure occurs, the "Service Safety Restraint System" warning illuminates, which completely disables the airbag deployment system. Driving a heavy passenger vehicle (2021 GMC Yukon) without active driver-side airbag protection leaves the operator exposed to severe injury or fatality in the event of a collision. 3. Dealer Confirmation / Reproduction: The problem has been reproduced, diagnosed, and confirmed by an authorized dealership (Quirk GMC in Manchester, NH) on five separate occasions spanning from August 2025 to June 2026. 4. Inspections: The component has been repeatedly inspected by the manufacturer’s authorized dealer technicians at Quirk GMC. It has not yet been inspected by police or insurance representatives, as no crash has occurred. 5. Warning Lamps / Symptoms: The failure is preceded by the "Service Safety Restraint System" dashboard warning lamp and message illuminating. This symptom first appeared in August 2025 at 78,472 miles and has continuously reappeared shortly after every subsequent repair attempt made by the dealership

The contact owns a 2021 GMC Yukon. The contact stated that while driving approximately 50-60 MPH, the vehicle was shuddering abnormally. The message "Restraint Safety System" was displayed, and the air bag warning light was illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 138,000.

On May 27, 2026, I was on my way home from work when I went to accelerate the vehicle and all the sudden it started shaking and the check engine light came on with the EBS. I was able to get the vehicle to a repair shop local the next day, who took the car apart. What was thought to be an easy fix of spark plugs and fuel injector, became even more after they put back together and the cylinder was still misfiring. After several hours of taking apart the engine, the mechanic determined that the hydraulic valve lifters had failed. This has been an ongoing issue with with the 5.8L V8. Due to a recall not being under the vin yet, i have now incured a $16k expense to add an engine to it after i purchased it in Nov of 25 at $97,000. This is a saftey issue and luckily no one was hurt when the car started shaking and couldn't go over a certain speed. I want this reviewed and looked at for possible reimbursement as there have been several other vehicles with the same known issue.

The contact owns a 2021 GMC Yukon. The contact stated that while pulling into the yard, the vehicle made an abnormal clanking sound and a hammer-like sound. No warning light was illuminated. The contact stated that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling), but the VIN was not included. The vehicle was taken to the local dealer, where it was diagnosed with metal fragments inside the engine. The vehicle was repaired, but the failure recurred while driving a month later. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 76,000.

I am filing a complaint regarding my 2021 GMC Yukon due to a serious engine failure involving the camshaft, lifters, and crankshaft. The vehicle began exhibiting engine ticking and knocking noises, rough idle, loss of power, and reduced performance. These symptoms progressively worsened and ultimately resulted in major engine damage. The vehicle was diagnosed with failed lifters and camshaft damage, which required extensive repairs. In addition, the crankshaft failed, resulting in catastrophic engine damage and making the vehicle unsafe to operate. These are critical engine components that should not fail prematurely under normal driving and maintenance conditions. The most serious concern is safety. The engine's loss of power and deteriorating performance created the risk of sudden failure while driving. A vehicle that loses power in traffic, while merging, crossing intersections, or traveling at highway speeds can create a dangerous situation and increase the risk of a crash. Occupants and other motorists could be placed at risk if the engine fails without warning. My vehicle has been properly maintained and serviced. Despite regular maintenance, these major engine components failed unexpectedly. I am aware that other owners of GMC and Chevrolet vehicles equipped with similar engines have reported comparable camshaft and lifter failures, suggesting a potential defect rather than an isolated incident. The failure resulted in significant repair costs, loss of vehicle use, and

The contact owns a 2021 GMC Yukon. The contact stated that while driving approximately driving 45 MPH and turning onto an exit the vehicle suddenly reduce speed and lost power and the message "Press Start" had displayed. The contact stopped the vehicle and eventually restarted the engine and the vehicle operated as normal. The next day the vehicle was driven to the local dealer who was unable to duplicate the problem and determine the cause of the failure. The manufacturer was not yet contact regarding the failure. The failure mileage was 42,000.

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle would independently activate Limp mode and would not accelerate past 30 MPH. In addition, the vehicle would not shift into the Reverse gear as intended. The vehicle was taken to a local dealer, where it was diagnosed with error codes: P0777 and P18A1. The vehicle was not repaired due to parts being on backorder. Upon further investigation, the contact related the failure to an Unknown NHTSA Campaign; however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 90,000.

Post-Recall Low Oil Warning + Performance Issues on 2021 GMC Yukon Denali – Campaign 25V274000 Vehicle: 2021 GMC Yukon Denali, 6.2L V8 Recall: 25V274000 Owner: One owner since new (purchased 2021) I had recall campaign 25V274000 performed on my vehicle. This was the first low oil warning I have ever received since purchasing the SUV new in 2021. I have always followed the vehicle’s oil life monitor with no prior issues. The change oil light appeared at roughly 7,500 miles after the recall service (when I already had a service appointment scheduled). About one week later, the low oil warning came on. I had the vehicle towed to the dealership and did not drive it after the warning. Since the recall service, I have also experienced performance issues including noticeable stuttering that was really evident before I towed it in. The dealership initially agreed to a consumption test but later acted like it was not needed, said everything was fine, and were dismissive — blaming me for not following their sticker. I am concerned the recall remedy is not fully effective. Please investigate this matter. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2021 GMC Yukon. The contact stated that after restarted the engine and the vehicle did not operate in reverse. During the failure no warning messages had displayed. The vehicle was driven to the local diagnosed that the transmissions needed to be replaced. The manufacturer was notified of the failure, but no assistance was offered. The contact was informed that the VIN was not included in the NHTSA Campaign Number: 24V797000(POWER TRAIN). The contact indicated that the vehicle had experienced that same failure listed in the recall. The failure mileage was 70,000.

Engine is misfiring. Took it into local mechanic who mentioned he has seen many similar issues and knew there was a recall for similar 2021 Yukon engine issues but for some reason this model was not included. He encouraged me to trade in the vehicle because most likely the engine would need to be replaced (or a $10,000 repair) and it was not save to continue to drive in this condition. I call GMC and they suggested I contact the NHTSA to request that this year and model be added to the recall listing for other similar Yukon engines.

The contact owns a 2021 GMC Yukon. The contact stated that the vehicle had a rough idle. There was an abnormal ticking and rattling sound detected. The vehicle lost oil pressure. The contact located smoke emerging from the vehicle. The engine light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed with a failure with cylinder five, no compression, and bearing failure. The dealer suggested the engine be replaced. The vehicle was not repaired. The contact indicated that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling) but was not included in the recall. The manufacturer was contacted who referred to the NHTSA hotline. The failure mileage was unknown.

I was driving in the left lane on [XXX] , a 4 lane interstate just outside of Cleveland when i lost engine propulsion. Engine RPMs dropped to under 1000rpm, and quit responding to throttle. I had to change lanes and coast until there was a shoulder available to stall out at while i awaited a tow. No warning lamps until i tried to restart vehicle. Engine cranked but wouldnt start. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Transmission has been replaced, still having same problems. Actuator was fixed within the transfer case. still shaking. was driven by dealer and told to check again after changing into summer tires. changed into summer tires and still having issues if not worse. separately; the power running boards have never worked - been told its wiring issue. wiring issue is a concern for fire safety.

My 2021 GMC Yukon AT4 with a 5.3L engine failed as I was driving down a highway going to my child's ballgame. It put me at risk of wrecking on the highway with other traffic around me as I needed to get my vehicle off the road way. Thankfully, I was able to get the vehicle to a safe spot to get it towed. After having the vehicle towed to my local GMC dealer, they determined my lifters in my engine failed and my camshaft had irreparable damage. GM has a lawsuit going on right now against their faulty lifters in their engines. The dealership told me they recalled the 6.2L engine, but not the others. It is shameful that they haven't recalled the other engines that also have the same lifters with the same active fuel management system. My power trained warranty has just expired and they want to charge me over 15,000 to replace the engine and radiator. I am now fighting with GM to help cover this expense that I feel a recall should take care of. These vehicles are not safe on the road with these faulty engine systems specifically the lifters inside them that are known to fail and GM is aware of this and not doing anything. Please help me and other GM owners get these vehicles recalled and make GM replace these engines at no cost to the owner due to their faulty engine components. My daughter and I could have been seriously been injured or died that day in the highway due to the abrupt engine failure on the highway going 70mph. Thank you for your time and God Bless.

Vehicle had lifter failure. This could’ve have caused a devastating accident to myself or family which includes my 8 year old daughter. GMC has knowledge of this problem with this motor

Motor started knocking My safety and my family safety was put at risk because we were driving down the street. The car is now at Woody dealership in Naperville, IL. Being inspected as we speak. No symptoms prior to failing.

Transmission valve body failed while driving on highway.

Hello, I was driving on the highway with my family and my engine had a sudden loss of power. I only have 52,000 miles on the engine and it has been serviced the entire time. We almost got in a major accident as we had cars and trucks moving around us at a very high speed as we tried to pull over in the breakdown lane. I brought the car to Daddario GMC in Shelton, CT. They did a diagnostic test and said that cylinder 2 was misfiring. Upon closer inspection they saw that there was oil sitting on top of the piston head which indicates engine failure. I have since contacted GM warranty services given my car was just past the warranty date of November 2025, but still under the 60,000 miles of coverage. I did some research and have seen this is a very common with these engines as GM did a recall on 600,000 already. For some reason my VIN # is not listed on the current recall even though my engine is in the same year as the others that were. I would like GM to cover my engine 100% but was told they may only pay a % to fix it. Can you do anything to help me get them to cover the engine at 100%? I also wanted to let you know about this issue as my VIN was not under recall and this may happen to other people/families who have the same engine as mine that isn't recalled. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While operating my 2021 GMC Yukon AT4, my vehicle suddenly developed a popping noise, the check engine light began flashing, and the traction control warning illuminated. The vehicle lost power and had reduced acceleration, forcing me to pull off the road because it was unsafe to continue driving. This created a serious safety risk and appears consistent with reported GM lifter or engine defects.

Lifter failure.

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle shuddered. The message to restart the vehicle was displayed. The contact stated that the vehicle shut off unexpectedly. Additionally, the check engine warning light was illuminated the day before the failure. The contact stated that while attempting to start the vehicle, the failure reoccurred. The vehicle was taken to Auto Zone and diagnosed with a fuel pump control module failure. The contact was made aware of an undisclosed recall. The contact was referred to the dealer for assistance. The vehicle was not repaired. The vehicle was later towed to the dealer, where it was diagnosed with a failed fuel pump control module. The contact was informed that the fuel pump control module needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated with a recall. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 200,000.

I was driving on the highway, I-55 N just north of Bloomington. I was on cruise control and was coming up to a lane merge going into construction zone. I braked, moved over, turned off cruise control and noticed the engine was cut off and rpm’s dropped to 0. Luckily I was able to get to the shoulder before the highway merged with no shoulder in construction zone. I have the 6.2 L engine in the GMC and have been through propulsion test and 2 oil changes since the test. My engine failed during highway travel and I see on several threads this unfortunately is an unsafe situation others have been in. What are my options as I do not feel safe in a vehicle that will turn off unexpectedly on highway travel.

2021 Yukon Denali. Inspected by dealer under recall. Passed dealership test and new oil viscosity adjustment completed by dealer at 39k miles. Told no issues with vehicle continue to drive it. Today 4-14-26 on the interstate traveling 75mph the engine seized and lost all power. Instrument panel showed 0rpm as I coasted to a stop and the engine lost all power. I placed the vehicle in park on the shoulder and attempted to restart. Nothing! Engine would crank. Towed to Olathe gmc dealer and they took one looke at it , diagnosed it said it had all symptoms of total engine failure. Ordered me an engine and told 6 weeks out. Sent me home in a loaner. Service department told me They get one everyday sometime more than 1. They have hertz rental on standby for warranty loaner vehicle. I find it spilling that these vehicles come time to be sold. They’re all bad according to the service department. I also find it very frustrating that they park the broken defective vehicles at the very back of the dealer lot to hide the graveyard of 6.2’s from the public. My vehicle is under 5 year 60k warranty and engine is being replaced, but the tech could not share the extent of what would be replaced. All he mentioned was the block. Zero warning engine just went up like a grenade at 75mpg on the highway. Wife’s vehicle and left me stranded 2 hours from home on a work trip.

Lifter and camshaft failure. Metal shards throughout the engine. Engine knocking and uncontrollable shaking. Safety was at risk of myself (driver) and two kids under the age of [XXX] while being broke down on a highway as vehicle was un-drivable. Reviewed by a Chevrolet dealership and Automotive repair shop both agreed on same repairs needed. No warning lights appeared before incident, multiple came up seconds after the problem occurred. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Loss of power while driving on highway, would not speed up. Shaky driving. Appeared to go into limp mode. Dealer informed me that the transmission valve body will need to be replaced. No prior messages or alerts, check engine light came on after power loss.

Engine is leaking alot of oil from crankshaft..I was informed there was a recall on the same type and years for the problem I am having but I do not have a recall on mine

The contact's daughter owns a 2021 GMC Yukon. While the owner was driving at an undisclosed speed, there was an abnormal ticking sound coming from the engine compartment. The sound was intermittent but frequent. The vehicle stalled intermittently with several unknown warning lights illuminated. The vehicle was taken to an independent mechanic, who advised that the vehicle needed to be taken to a dealer for additional assistance. The vehicle was taken to a dealer, but it was not yet diagnosed. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not associated with the recall. The failure mileage was approximately 154,000.

Ngine seized (according to GMC dealership service department). I was driving 75mph down the highway and the car shut down. I noticed it losing power so I was able to get off at the exit ramp, but not in a safe location. The car shut completely down in the right lane at the stop sign. Approximately 7:50pm car broke down - stuck on the road until 10:22pm. Yes safety of myself and others were put at risk. We purchased the car 2 weeks ago with no signs of issues. Bought the car with 103,499 miles. The car had very well maintained service records as well at time of purchase. We towed the car to the GMC dealership and they said the engine is seized up. No warning lamps or messages at time of failure. I drove the car early that day and it was running fine. I do not have any documents to upload at this time. Since this all happened on Friday and we are just now getting the report back today (Tuesday).

Engine shut down in 2022 due to faulty lifters. Repairs were made. Same problem again in 2026.

The contact owns a 2021 GMC Yukon. The contact stated that while driving at various speeds, the vehicle shuddered abnormally with blue smoke coming from the exhaust, with the message "Lane Departure Assist" displayed. The check engine and stabili-trak warning lights were illuminated. The vehicle was taken to a local service center, where it was diagnosed with cylinder #1 misfire. The local dealer was contacted. The vehicle was not diagnosed or repaired. Upon further investigation, the contact related the failure to the GMC Service Bulletin:15-06-01-002L. The manufacturer was made aware of the failure. The failure mileage was approximately 110,000.

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.

I had just pulled off from street light, hit button to turn auto engine shutoff off, all of sudden I lose power as if I'm in neutral, engines reving up but won't go. Then kicks in but with less power like gears will not shift. I get to my destination but car will not go in reverse.

Exhaust fumes and stink on cold start . vehicle only has 40,000 mi and I have exhaust smells coming in through hvac system!!

My vehicle started making a weird noise and when I took it to the shop, they told me my crankshaft has gone bad and I was lucky I caught it before the entire engine blew

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.

Oil consumption is an issue. My vehicle is using a quart of oil every 1,000 miles. Manufacturer says oil changes are 5,000 mile intervals, however at 2500 miles the dipstick is dry and the low oil light comes on. There are no leaks in the driveway, nor is it smoking. The manufacturer claims this is normal. If I were to wait the 5,000 miles for an oil change I would only have three quarts of oil left in an engine that is supposed to have 8 quarts and therefore my engine would lock up. I fear that this engine will fail and I travel with our daughter all over the state of MO and OK for horse shows and do not wanted to be stranded on the interstate with my child in the car. After much research it is obvious this is a common problem with the 6.2L engines. There is an abundance of videos, forums, chats, etc stating how widespread this issue is and that GM continues to put off developing a fix or replacing the engines. We just completed an oil consumption test with the dealership and they are going to submit it to the warranty company. However, our fear is they will deny it saying it's a GM issue and kick it back to us.

Air bag suspension does not work in sub freezing temperatures. Vehicle bounces up and down excessively and is extremely unstable and unsafe to drive at any speed. Vehicle speed was limited to 56 mph. Dealer stated that this is a known flaw but not recall has been issued. This is a design flaw that GMC should be responsible to correct.

I own a 2021 GMC Yukon Denali XL with approximately 81,000 miles. On 4 separate occasions, after coming to a complete stop in traffic and then attempting to accelerate, the vehicle violently jerks and shifts itself into park. I am not pressing the brake when this occurs. I must manually shift the vehicle back into drive in order to continue moving. This happens so fast, that I am only able to see a red outlined box that intermittantly flashes on the dashboard but I cannot see what it says before it disappears. The incident feels as though the vehicle has been struck from behind due to the abrupt force. This has occurred more than once and creates a dangerous situation in traffic, particularly when vehicle are behind me. The vehicle has been taken to a GMC dealership, which has serviced the vehicle since 2021. The dealership reports they were unable to duplicate the condition after driving approximately 60 miles and therefore cannot perform a repair. This issue remains unresolved. Given that the vehicle is shifting into park while in motion or during acceleration, I believe presents a significant safety hazard.

The contact owns a 2021 GMC Yukon. The contact stated that while shifted into drive(D), the accelerator pedal was depressed, and the vehicle lost motive power, and several unknown warning lights were illuminated. The contact stated that the check engine, stability control, and several other warning lights were illuminated. The contact stated that the vehicle was making abnormal whining sounds, and the vehicle failed to accelerate above 20 MPH. The contact had been experiencing the loss of motive power with the vehicle for approximately 2 years; however, the failure was intermittent. The contact had taken the vehicle to a local dealer on several occasions; however, the failure persisted. The contact notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); and the vehicle was taken to a local dealer for the engine to be tested. The contact was advised by the dealer that the engine had passed the test, and a higher viscosity oil was added, and the oil filter and oil filler tube were replaced, along with updating the manual. The vehicle was repaired; however, it was still experiencing a loss of power with several warning lights illuminated. The manufacturer was made aware of the failures. The failure mileage was approximately 42,000.