2021 GMC Yukon

333 complaints on file, page 1 of 17.

1. Filed Oct 1, 2026Failure Sep 30, 2026mt pleasant, SCEngine

   I purchased this vehicle new in 2021. In XXX, the vehicle started shaking while driving then suddenly cut off. Mileage was a little over 12K. Diagnosis was an engine lifter issue. The dealership replaced all 16 engine lifters. The vehicle now has a little over 52K miles on it. The engine lifters have failed again. This is a known safety issue for this (and other GM vehicles) manufactured in the same timeframe. However, GM has not issued a recall. I am now looking at having to replace the lifters at my cost and/or driving an unsafe vehicle. I have a wife and [XXX] son. This is an untenable situation. GM must issue a recall and correct this issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint 11768352
2. Filed Sep 29, 2026Failure Sep 11, 202672,850 milesLinn Creek, MOEngine

   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.

   NHTSA complaint 11767854
3. Filed Sep 29, 2026Failure Sep 28, 2026Hammond, LASeats

   I drove my car on Saturday and nothing was wrong with it. I opened my car door on Monday morning or work and my driver side seat was twisted. There was no warning signs nothing. The dealership said that a rod is not working probably. I have had two other yukons and drove them for almost 10 years and never had this issue. This is my third one and only has 41,000 miles and has been to dealership to be serviced. This should not have happened. According to research I have done it states that there were some TSBs on mechanical failures in the seats. I was directed to ask for the dealership to contact GM goodwill assistance on my behave since I have been a loyal GM customer. This is a serious safety concern if this would have happened while I was driving.

   NHTSA complaint 11767675
4. Filed Sep 26, 2026Failure Aug 6, 2025Gilmer, TXEngine, Unknown or other

   General Motors, Orr GMC and Sewell GMC are purposely concealing issues and service records related to my vehicle. I believe it is intentional fraud on their part to mislead the public, legal/judicial officials and oversote authorities about the severity the L87 engine failures and excessive oil consumption. They have lied about the status of the vehicle during oil consumption tests, refused to document test results and even rescinded their offer to replace the engine when I refused to sign their release of liability that contained false statements. Orr GMC also completed work on my vehicle without my knowledge or consent that led to worse issues. This is a safety issue for the public and for my family and I.

   NHTSA complaint 11767182
5. Filed Sep 21, 2026Failure Sep 21, 2026Wexford, PAFuel/propulsion system

   My 2021 GMC Yukon has approximately 36,900 miles. On September 12, 2026, the vehicle was at an authorized GMC dealership and passed a state safety inspection. On September 19, 2026, the check-engine warning light illuminated and I returned to the dealership. The dealer performed diagnostic testing and told me the fuel pump pressure was approximately 400 PSI when it should be approximately 700 PSI. I was told the fuel pump needs to be replaced. The vehicle is currently at the dealership awaiting the replacement part: Fuel pump I was not aware of a fuel-pump failure before the warning light appeared. I am particularly concerned because this failure occurred at only approximately 36,900 miles. GM previously recalled 3,386 2021 GMC Yukons under NHTSA Campaign 21V-739/GM Recall N212332040 for a fuel-pump power-control-module defect that can cause the fuel pump to fail or operate intermittently, interrupt fuel flow and potentially cause the engine to stall. My 2021 Yukon is not included in that recall and currently shows no unrepaired recalls associated with my VIN. I believe this represents a potential safety concern because inadequate fuel delivery or a fuel-system failure while driving could cause reduced engine power or an unexpected stall, increasing the risk of a crash. Given the low mileage, the dealer-confirmed fuel-pressure problem, and the existing fuel-pump-related safety recall affecting other 2021 Yukons, I am concerned that my vehicle may have the same or a related defect despite not being included in the recalled population. I believe NHTSA should evaluate whether additional 2021 Yukons should be included in a safety investigation or recall. I am paying out of pocket to have the fuel pump replaced and am filing this complaint to document the failure.A fuel-pump failure at only 36,900 miles is extremely concerning. I ask NHTSA to determine whether my vehicle has the same or a related defect and whether the existing recall population should be expanded.

   NHTSA complaint 11765898
6. Filed Sep 21, 2026Failure Sep 17, 2026Greenback, TNEngine

   I am filing this complaint regarding severe, excessive oil consumption in my 2021 GMC Yukon equipped with the 6.2L V8 engine (VIN: [XXX]). The vehicle is consuming oil at an accelerated and hazardous rate. Specifically, the engine oil level drops completely below the viewable crosshatches on the oil dipstick well before the vehicle’s automated Oil Life Monitoring system reaches 50%. This level of rapid oil depletion creates a significant safety risk, as it puts the vehicle at risk of sudden engine stalling, severe mechanical failure, or total engine lockup while driving at highway speeds, potentially causing a crash. General Motors has issued Safety Recall N252494000 to address internal manufacturing defects within the 6.2L engine that lead to mechanical damage and heavy oil loss. Although my vehicle is a 2021 model with the exact 6.2L V8 engine experiencing the identical, severe oil loss symptoms detailed in the recall, my specific VIN is currently excluded from the recall list. I request that the NHTSA investigate this issue and pressure General Motors to expand the parameters of Recall N252494000 to include all affected 6.2L engines exhibiting this dangerous defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint 11765877
7. Filed Sep 15, 2026Failure Aug 1, 202688,000 milesWilmington, DEPower train

   The contact owns a 2021 GMC Yukon. The contact stated that while driving at various speeds on several occasions, the vehicle jerked and the transmission shifted hard into 1st and 2nd gears. The message "Service Safety Restraint" was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed with a failed valve body. The contact was informed that the valve body or the transmission needed to be replaced. The manufacturer was notified of the failure. The failure mileage was approximately 88,000.

   NHTSA complaint 11764503
8. Filed Sep 15, 2026Failure Sep 12, 202695,000 milesLake Ozark, MOEngine

   The contact owns a 2021 GMC Yukon. The contact stated that while his wife was driving 65 MPH on the highway at higher speeds, the vehicle shuddered abnormally. The check engine, ECU, and traction control warning lights illuminated, and the message "Shut off Vehicle as soon as Possible" was displayed. The contact's wife pulled over to the shoulder of the road, and the vehicle was towed to an independent mechanic for diagnosis. The mechanic retrieved dDTCs: P0307 and P050D, indicating a failed roller lifter, valve spring, and valve roller lifters. The vehicle was later towed to a local dealer, where the dealer diagnosed that the lifters had failed and needed to be replaced. The manufacturer was notified of the failure. The failure mileage was approximately 95,000.

   NHTSA complaint 11764399
9. Filed Sep 11, 2026Failure Aug 12, 2026St. Petersburg, FL, FLElectrical system

   Water is entering the passenger cabin through failed front sunroof drain tubes on both the left and right sides. The drains discharge inside the A pillars rather than to the exterior, pooling in the driver's side floorboard. An authorized GMC dealer diagnosed the cause in writing on August 12, 2026 as rubber grommet shrinkage and hardened internal buildup preventing water from flowing through, on both the left and right sides simultaneously. The identical bilateral failure mode indicates a component or assembly defect rather than debris blockage. Water is accumulating in the driver's footwell in proximity to cabin electrical components and the fuse block area, creating a risk of electrical shorting, connector corrosion, and circuit failure. Mold has developed in the front carpet and padding on the driver's side, and water intrusion staining is present on the passenger side. The dealer has quoted $2,727.16 to replace the drain tubes and the mold-damaged carpet and padding. The vehicle entered service on February 5, 2025 and has 45,211 miles. GM has issued service bulletin 20-NA-219 addressing sunroof drain hoses on 2021 Yukon, Yukon XL, Tahoe, Suburban, and Escalade models.

   NHTSA complaint 11763591
10. Filed Sep 11, 2026Failure Aug 6, 2026Fort Worth, TXEngine, Warnings

    Crankshaft / Camshaft caused catastrophic engine failure while on a family road trip leaving family and kids stranded on the side of the highway for hours. 2021 GMCs are notoriously having this issue but they refused to include our VIN in the recall. It cost us almost $13,000 to replace with a brand new engine and only 4 days after picking up from dealership the vehicle stopped working and shut off at a light in the middle of the road. GMC has been no help and won’t cover anything.

    NHTSA complaint 11763546
11. Filed Sep 10, 2026Failure Apr 16, 2026Mequon, WIPower train

    Had a valve body failure in mid XXX. The vehicle would not go into reverse and drove it in limp mode to a dealership about 5 miles away. Fortunately they were able to get a new valve body and repair it in one day. Cost was approximately $3,500 and not covered by warranty. The vehicle had about 110,000 miles on it at the time. This is a known defect on this vehicle and a recall should be initiated. Had we started our trip from [XXX] back to [XXX] before the failure occurred, we likely would have been stranded on the highway, or worse. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11763438
12. Filed Sep 8, 2026Failure Mar 1, 2025Gilmer, TXEngine

    Fraud and gross negligence by General Motors, Orr GMC and Sewell Buick GMC.

    NHTSA complaint 11762930
13. Filed Sep 8, 2026Failure Sep 5, 2026Chesterfield, MIEngine

    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.

    NHTSA complaint 11762672
14. Filed Sep 3, 2026Failure Aug 28, 2026Byram, MSEngine

    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.

    NHTSA complaint 11761792
15. Filed Sep 2, 2026Failure Apr 1, 2026Panama City, FLEngine

    Lifters failed under 80k miles. Had lifters replaced with gm parts and engine is continuing to eat up oil and lifters are failing again in less than 3 months after the repair. Vehicle was out of warranty and all costs were out of pocket including a rental for over a month bc parts were on backorder

    NHTSA complaint 11761777
16. Filed Sep 2, 2026Failure Sep 2, 2026Broomall, PAEngine

    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.

    NHTSA complaint 11761614
17. Filed Sep 1, 2026Failure Apr 12, 2024Kingston, OKEngine

    this year model was recalled do to engine problems. Ours wasn't one that was on the recall list. We ended up having to have the motor rebuilt and cost us around $7000. We have seen where these models are still having problems, so i wanted to report our problem and the money spent to get it fixed.

    NHTSA complaint 11761391
18. Filed Sep 1, 2026Failure Aug 27, 2026Azle, TXEngine

    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.

    NHTSA complaint 11761322
19. Filed Aug 31, 2026Failure Jul 28, 2026Blythewood, SCElectrical system, Unknown or other

    While driving the vehicle on the interstate, the vehicle shifted to neutral without warning. Our daughter was able to fortunately coast to the side of the interstate without incident. The vehicle was shut off and attempted to turn back on without success, so vehicle was towed to Lugoff Chevy dealership where repairs are always performed. The dealership stated the problem was related to fuse block melted and shorted. The problem was fixed; however, I am not convinced that this shouldn't be something requiring a recall and needs further investigation. There was no warning lamps, messages, or symptoms prior to the failure.

    NHTSA complaint 11761018
20. Filed Aug 31, 2026Failure Aug 12, 2026El Paso, TXEngine

    Engine making a loud ticking noise. Lifters broke in the engine. No warnings, no lights. I turned on the vehicle and it started making the noises. Dealer wanted to do an engine swap. Independent service center is changing out the lifters.

    NHTSA complaint 11760952