GMC Yukon Complaints (2019)

58 consumer complaints on file.

#11765266September 18, 2026
POWER TRAIN
Lifters failed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11760263August 28, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754651August 4, 2026
ENGINE
My wife drives this vehicle to work, it has started to experience reduced engine power driving on the highway causing her to pull to the side of the road due to no throttle to maneuver the vehicle in and out of traffic, leaving her on the side of the busy highway, we have now parked the vehicle after investigating problem there is a knocking noise coming from the lower part of the engine, after research of this 6.2l engine there are reports of the crankshaft and connecting rods seizing up and coming through the side of the engine block, knowing this we are hesitant to continue driving the vehicle. We continue to make payments on a vehicle that we can't use and can't afford to make a engine replacement at the moment. Very frustrating to say the least, as expensive as these vehicles are we have lost faith in the gm name.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11754165August 1, 2026
POWER TRAIN
Vehicle shudders at acceleration at times making merging onto highways and passing vehicles dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11748498July 6, 2026
POWER TRAIN
The vehicle experienced a sudden and rapid mechanical failure of the 6-speed automatic transmission (6L80 model) within a span of less than two weeks. The light did not come on until the transmission was past salvage. The failure escalated rapidly from initial minor slipping to a severe loss of vehicle propulsion. A loss of acceleration while driving poses an immediate crash hazard, as the vehicle cannot safely maintain speed with surrounding traffic or accelerate out of dangerous situations. The failure required towing and a complete out-of-pocket replacement of the transmission unit at 116,374 miles to restore safe operation. The manufacturer has failed to issue a safety recall despite widespread failures of this component causing unexpected power loss on public roadways.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11746869June 27, 2026
POWER TRAIN
Transmission is acting funny. Stuck in low gear /not shifting at low speeds. Vibration sometimes at higher speeds when shifting gears. 8 9 10 gears.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11746019June 23, 2026
POWER TRAIN, ENGINE
I was driving home on the interstate from vacation and I was set on cruise control it was 1 am so not a lot of traffic was on the road thank god. It could have been really terrible if lots of traffic was present as the engine just died without notice! The vehicle was decelerating nothing was working I could not speed up. I was able to get over to the side of the road. I got a notification on my phone that said battery critically low start vehicle to charge battery. Well nothing would start at this point. I lot all power seconds later. I thought that the cruise control was locked up and restarting it would reset it. I called roadside assistance to get a jump and that did not work. I got towed into an auto repair shop. They called me and told me that the engine is locked up that they drained the oil and found metal in it and metal pieces in the oil filter as well. They checked for leaks and said there was none that they could find. They said there was a recall but it was for the exact same symptoms that was diagnosed here but only starting with year 2021. Mine is a 2019 Yukon Denali with low mileage so not sure if all the other Yukons were aged out or already past engine death and that’s why they were not part of this but this should be included in with the open recall considering how everything is the same that is effecting this year that I have and they should pay for a new engine! Clearly the v8 6.2 gmc engines are having major issues I’m just glad I wasn’t going that fast and traffic was slow so I was able to get over safely before catastrophic things happened since there was no warning when this all happened!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11745235June 19, 2026
ENGINE
Getting the valve ticking noise.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11740565May 28, 2026
ENGINE
The contact owns a 2019 GMC Yukon. The contact stated that after starting and exiting the vehicle to allow it to warm up, the contact later noticed that the vehicle had turned off. The vehicle was towed to a first mechanic, who was unable to restart the vehicle or determine the cause of the failure. The vehicle was towed to a second mechanic, where it was diagnosed and determined that the engine had failed and needed to be replaced. The vehicle was not repaired due to the cost. The dealer was contacted and provided an estimate for the repair, but the vehicle was not diagnosed or repaired. The contact stated that the dealer's estimate was higher than the mechanic's estimate. The manufacturer was notified of the failure and suggested purchasing a new vehicle. The failure mileage was approximately 170,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11730524April 11, 2026
ENGINE
Complete engine failure. The dealership kept the engine. This happened at a low rate of speed but it would have been much worse if on the highway. Yes the engine was completely replaced. The check engine light came on and their was a loud ticking noise coming from the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11729010April 3, 2026
POWER TRAIN
The contact owns a 2019 GMC Yukon. The contact stated that while driving at slow speeds in a parking lot, the transmission unexpectedly downshifted and the vehicle jerked abnormally. The contact stated that when the gear shift lever was shifted to drive(D), the vehicle failed to function as designed. The contact was unable to drive the vehicle, and the vehicle was towed to the residence. No warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed that metal shavings were found in the oil and the transmission needed to be replaced. The warranty had expired, and the vehicle was not repaired. The contact stated that the failure persisted. The vehicle was then taken to a transmission specialty shop, where it was confirmed that metal shavings were found in the oil and that the transmission was defective and needed to be replaced. The contact took the vehicle back to the private dealer where the vehicle was purchased. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 125,870.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725299March 18, 2026
ENGINE
I was driving on RT80 in NJ and my 2019 GMC Yukon lost power. I took it to my local Chevy dealer. The scan code was p0300 engine misfire. They removed right side valve cover and found no bent pushrods. Inspected camshaft and found damage from failed lifter. I had to get a new engine and pay out of pocket $14,435.44
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725322March 18, 2026
ENGINE, POWER TRAIN
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
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716767February 9, 2026
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Automatic emergency braking system deployed unexpectedly on acceleration from a traffic light stop. Vehicle was about 10-15 MPH and system operated with no brake pedal input. A vehicle behind had to do a panic stop to avoid collision. Deployment disengaged when accelerator pedal was released. My wife, principal driver, was in the car. She advised this had occurred two times before. No recalls are presently listed for the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716160February 6, 2026
ENGINE
Check engine light came on. Went off a little later and then came back on. Took it to the dealership where they ran codes. They changed the fuel injector and spark plugs based on the codes listed. They heard a noise coming from under the engine and felt like it was the same failure that it happened in the 2021 to 2024 Yukon models those engines had been recalled. Was quoted $15,000 for a new engine was also charged $1000 for the fuel injector and spark plugs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11710111January 10, 2026
ENGINE
Engine lifter spring failure followed by bent valve push rod experienced on or about 11/6/2025. Engine repaired/re-built at independent auto mechanic for a total of $6,450. Parts not available but have pictures. Depending on where this incident could have occurred (freeway, long trips, while towing (boat, horses), etc.) safety concerns include being stranded in traffic or remote areas. Engine lost significant power and wouldn't have been able to tow. Engine knock warning light.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11705894December 18, 2025
ENGINE
My name is [XXX] I have a 2019 GMC Yukon Denali with 226,000 miles my engine has went out do to the same issues that's going on with the GM motors right now. I have brought it in to Courtsey GMC and they told me my engine needed to be replace do to oil pressure problem cylinder 8 was bad. After taking the engine apart they notice the problem. my phone number [XXX] email [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11704342December 10, 2025
ENGINE, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
Engine failure at 114k miles required replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700050November 18, 2025
ENGINE
MEMORANDUM To: National Highway Traffic Safety Administration (NHTSA) Subject: Safety Defect Report – 2019 GMC Yukon Denali 6.2L V8 (L87) with AFM/DFM I am reporting a serious and recurring safety defect involving my 2019 GMC Yukon Denali equipped with the 6.2L V8 L87 engine and GM’s AFM/DFM system. In the past twelve months, I have experienced two separate engine failures, both occurring at highway speeds and both involving valve-train/VLOM failures on the same side of the engine. In each incident, the vehicle suddenly lost power, misfired violently, and became unable to maintain speed. This created an extremely dangerous situation for my family. One failure occurred while my wife was driving; the other occurred while my [XXX] son was driving. Both were forced to maneuver across high-speed traffic with a failing engine to reach the shoulder. These events posed a clear risk of a high-speed crash, injury or even a fatality. There are hundreds—possibly thousands—of documented complaints from owners of GM vehicles with AFM/DFM-equipped engines reporting the same issues: collapsed lifters, valve failures, VLOM malfunctions, and sudden loss of propulsion. These failures often occur without warning and show a consistent pattern across multiple model years and engine variants, including the L87. The sudden loss of power at highway speeds represents a significant safety hazard. The frequency of similar reports suggests a systemic mechanical defect rather than isolated incidents. I respectfully request that NHTSA open a formal investigation into AFM/DFM-related failures in GM’s L87 and related V8 engines, with a focus on lifter, valve, and VLOM failures that lead to abrupt engine shutdown. Appropriate safety action, including a mandatory recall, should be done immediately to prevent potential injuries or fatalities. I will provide repair documentation, service reports, and other additional information. [XXX] , Esq. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698569November 10, 2025
ENGINE
Four of the eight oil lifters in my 6.2L engine in my 2019 GMC Yukon failed. The car has around 53,000 miles. The issue was confirmed by an independent service center. There were no warning lamps or messages prior to the issue. Zero. The service center even ran diagnostics with no result and could not confirm the issue until after it partially took apart the engine. I noticed a noise similar to a card flapping in the wind and took it to the service center that same day. The car had been properly serviced with oil changes and still had 44% oil life that same day. Repairs are currently being made and estimated at $4,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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