2024 GMC Yukon XL: sudden loss of power

Filed May 19, 2026 · Engine · KY

Engine failed- threw a rod Available for inspection Engine failed in the middle of a 6 lane interstate with 70mph speed limit. Locked up. Loss of power. No warning. Engine replacement needed- confirmed by dealer. This is the second engine replacement in less than 2 years Vehicle purchased in June 2024 Engine replaced June 2025 Vehicle taken to Glockner of Ironton Ohio in Aug 2025, Jan 2026, Feb 2026 and March of 2026 due to a knocking and ticking noise in motor. I was consistently reassured it was a normal sound per GMC. Engine locked up in the middle of the interstate may 15, 2026

Filed May 4, 2026 · Engine · PA

Purchase this Vehicle November 1st 2025 as a GM certified used vehicle. Had several issues with the camera system including the backup camera. Would go offline and not be usable for days. Vehicle went back to shop several times for this with no resolution. Now February 18th 2026 at approximately 630PM EST (after sunset) on the way into work traveling on the highway the engine lost power and engine shutdown. Vehicle shifted into neutral with the indication to press the start button in order to shift into Drive. This cause all of the lights to shutdown when it tried to start the engine. I was barely able to pull this over to the shoulder before I lost forward motion. Narrow shoulder. Tried to restart again with the same results. Call towing company. They attempted to jump start vehicle. Same results. All power shutdown. Truck was loaded onto flatbed and towed to dealership. Dealership states bad battery. Got authorization to replace battery from the dealer in which I purchased the truck. hey attempted to start and then it burned out the main fuse. They determined that the engine had seized and they were going to replace the engine. I looked up to find that GM had performed the engine oil replacement procedure in June of 2025. This vehicle is listed in the "recall" for defective L87 engines. Clearly changing the oil had no effect to remedy the issue. I have no faith that the new engine will not fail the same way this one did.

Filed Mar 23, 2026 · Driver assistance, Electrical · NJ

This is a Post-Remedy Failure of Recall 25V‑274 (GMC 6.2L L87 Engine). Following a full engine replacement performed by the dealer under this safety recall, the vehicle has suffered a catastrophic electrical compromise. The vehicle is currently throwing codes P2534 (Low Ignition Voltage) and U3018 (BCM Communication). Safety Hazards: The vehicle experiences sudden loss of power, engine stalling at highway speeds, and total failure of the exterior turn signals (hyper-flash). The AC system has been disabled by the Body Control Module due to low voltage, creating a hazard in high temperatures. This vehicle fits the exact profile of the federal safety agency Recall Query RQ26-001 and Engineering Analysis EA25-007. The manufacturer's remedy for the safety recall has failed to restore the vehicle to a safe operating condition, and the dealership is attempting to charge diagnostic fees to investigate their own defective recall workmanship.

Filed Mar 13, 2026 · Engine, Transmission · FL

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.

Filed Feb 3, 2026 · Engine, Fuel system · PA

About 4 weeks ago my vehicle began shaking uncontrollably while driving. The check engine light illuminated and multiple warnings appeared including emissions system, variable valve timing system, engine and transmission failures shown on the GMC app. I contacted the selling dealership and was given an appointment 4 days later. Later that day I drove less than 5 miles to pick up my children from school. During that drive the vehicle filled with a strong gasoline odor and exhaust fumes were overwhelming. I feared the vehicle could catch fire. I contacted the dealership again, stated the vehicle was unsafe, dropped it off at approximately 8:00 PM and was required to obtain my own rental vehicle. After one week I was told the engine required a camshaft and lifter replacement. Inspected & approved by extended warranty, parts were ordered and installed. I retrieved the vehicle on 23 days after the initial failure. The following morning (24th day) while driving approximately 75 mph on a major interstate with my children the vehicle suddenly shifted into neutral and would not re-engage. I was unable to shift into any gear and coasted to a narrow shoulder inches from traffic and guardrail.The dashboard stated the vehicle could not shift into gear and instructed me to push the start button. The engine would not restart. We were stranded approximately two hours in 10-degree weather on a major interstate with heavy semi-truck traffic. Roadside assistance was required. 3 days later the dealership stated the failure was a fuse block. After replacement the vehicle was test driven and stated to be operating normally. A second dealership employee test drove the vehicle, it died again and had to be towed back to the dealership. The battery was replaced after draining while disabled. Repeated mechanical and electrical failures resulted in complete loss of power at highway speeds and placed my children and me in immediate danger. I no longer believe this vehicle is safe to operate.

Filed Jan 28, 2026 · Steering, Suspension · NY

I am filing this complaint regarding a serious and ongoing safety issue with my GMC Yukon Denali that began with a complete engine failure while driving on the highway with my entire family in the vehicle. While driving at highway speed (about 60–70 mph), the vehicle suddenly lost power and shifted into neutral on its own. While still moving, I tried multiple times to shift back into Drive so I could safely get off the road, but it would not engage. I was only able to coast partially onto the shoulder before the vehicle came to a complete stop, still partly exposed to traffic. The engine shut off and would not restart at all. It would not go into Drive or Neutral, and the vehicle was completely dead. And it had to be towed. The dealer later told me the engine had failed and that a new engine was installed. About a week later, I picked the vehicle up. Less than 20 minutes after leaving the dealership and getting back on the highway, smoke started coming from the vehicle and warnings appeared, messages that the engine was overheating and that I needed to stop the engine immediately. The vehicle was not drivable again and had to be towed back. I again had to arrange transportation home. A few days later, I picked the vehicle up again. Since then, I have had serious four-wheel-drive and drivetrain issues. The vehicle became stuck in 4 Low and I could not get it out for over a day. When it finally came out, the drive mode buttons stopped working correctly. Selecting 2 High sometimes puts it into 4 High, selecting Auto puts it into 2 High, and Auto mode no longer appears. Even when it shows 4 High, the steering is restricted cannot steer 100% to the right or left and the vehicle binds, pops, and jumps when turning. I believe this vehicle is unsafe and poses a serious risk.

Filed Mar 15, 2025 · Electrical · PA

Today while exiting an off ramp. I stopped for traffic signal. Truck immediately lost power and shifted to neutral. I placed my 4 ways 1. Put the people back in park restarted the ignition truck fired up. This is concerning as i've never had a vehicle with five thousand miles brand new shut off on me.

Filed Jan 24, 2025 · Engine · IN

1/14/25 car lost acceleration, power steering, power braking while driving on the interstate. no warning. car switched to neutral and would not be put back into drive and stopped running. eventually restarted and drove towards a safe location with rough shifting for another few miles before the loss of power again and began making loud engine sounds. at this point the car died again and did not restart. this was the first time any check engine or warning light came on.

Filed Jan 18, 2025 · Engine · TX

My wife was driving our 2024 Yukon Denali XL when, without warning or any indications, the engine shut down. She lost power to the car car in the middle of a highway, endangering herself, our children and other drivers on the road. She was unable to restart the car or change the gears. She had to call the police to help and they ordered a tow truck to have the car towed. The car had been in for an oil change 2 days prior at the dealership. We had the car towed there and they confirmed the engine needed to be replaced. Looks like we can add this to the laundry list of other GM trucks with the same issue.