2023 GMC Yukon: stuck in gear or won't shift

Filed Oct 11, 2026 · Engine · NC

On September 20, 2026 around noon while traveling in the left lane on interstate 40W in North Carolina the engine of my 2023 Yukon Denali seized up with no warning. The screens shut off, then turned back on, and as I attempted to avoid hitting anyone or causing an accident on the road, I tried to shift it back into gear and it would not shift back into gear. Unable to use the gas pedal I put my right turn signal on along with my hazards and slowly made my way over to the right breakdown lane carefully to avoid causing an accident. I tried to start the engine again and the screens would turn back on, tell me to push the start/stop button again, then the screens would turn back off and on again and the engine would not start back up. In the breakdown lane I checked the battery connections and a couple other things that I thought might be the issue, but I had a feeling this was the engine issue that caused the safety recall on the 6.2 L GMC engine. My safety, my wife’s safety, and every other vehicle around me was put at risk because of this, and it could’ve ended horribly in injury or possible death. Prior to this, I brought the vehicle in for the safety recall inspection, it passed, and they changed the oil and type of oil filter to “fix the issue“. I used OnStar to set up a tow (which we paid for out of pocket), the estimated wait time was four hours, so we called an Uber (which we also paid for out of pocket) that took over an hour and a half to pick us up due to location on the highway. Vehicle was towed to a dealership and is available for inspection if requested. The next business day, the dealership was unable to get the engine to start and diagnosed with complete engine failure. They began the process of setting up a complete engine replacement. Said it may take 3 to 4 weeks. I am skeptical and think it will take more time. There were zero warning lamps, messages, or noises that could be heard prior to the failure which makes this incident so dangerous.

Filed Aug 31, 2026 · Electrical, Engine · CA

I have a 2023 GMC Yukon that has been to the dealership 3 times in a weeks time, and as of today, 8/31/26 will be the fouth time. On 2 occasions, the SUV has entered Limp Mode while driving. I had the SUV towed for the first limp mode, and the dealer claimed it needed recalibration modules. I picked up the car and drove home eight miles, and the check engine light came on. I returned the next day for readings and TCM P0700, P1789, U0101, U220F. The dealer's solution was to recalibrate the gateway module this time. I drove the car about 20-ish miles, and at highway speeds on the freeway, I got limp mode again. Off to the dealership, having the SUV towed again. The dealership has claimed the electrionic car codes clear themselves and because of that they can't re-create the codes to find a solution. I am scared to drive my SUV, I do not feel safe in it let alone my children.

Filed Aug 24, 2026 · Electrical, Engine · PA

On August 22, 2026, I was driving my 2023 GMC Yukon Denali with the 6.2L V8 at highway speed when the vehicle began struggling to maintain power while climbing a hill. The engine then developed a noticeable knocking sound. Shortly afterward, the engine shut off completely while the vehicle was moving, causing a sudden loss of propulsion. I was able to bring the vehicle to a stop, but the engine would not restart. The electronic transmission also would not shift into Neutral and displayed a message indicating that the conditions required to shift were not met. Because the vehicle could not be shifted out of Park, the towing company had difficulty loading and unloading the vehicle. The failure occurred during normal highway driving and created a significant safety concern because the engine shut down without warning while the vehicle was in motion. I am aware of the federal safety agency Recall 25V‑274 / GM Recall N252494000 involving certain GM vehicles equipped with the 6.2L L87 engine, as well as the federal safety agency Engineering Analysis EA25-007 concerning engine failures and loss of propulsion. At the time of this complaint, the dealership has not yet confirmed the specific mechanical cause of my vehicle’s failure. The vehicle is being taken to an authorized GMC dealership for diagnosis. I am submitting this complaint because of the sudden engine failure and loss of propulsion while traveling on a highway.

Filed Jan 26, 2026 · Transmission · TX

the Engine started running rough and the engine light came on. The dealer told my wife to drive there in limp mode (~15 miles), she did so on back roads. The diagnostics said that cylinder 7 was not firing and teh fuel injector control circuit was bad. they had to replace the Engine Control Unit.

Filed May 12, 2025 · Transmission · OH

Vehicle has 32,000 miles and the valve body has gone out and now parts for possibly months. My vehicle has been in the shop over these first 2 years over 2 months. Now this issue with the valve body it has been in over two weeks and they claim it will be months before they can get parts. This issue puts the vehicle in limp mode and most likely is damaging the clutrch packs as they go out. People all over the forums are having issues with these 10 speed transmissions. Something needs to be done to help out those affected.

Filed Apr 29, 2025 · Transmission · 72,000 miles · WV

The contact owns a 2023 GMC Yukon. The contact stated that the vehicle failed to reverse as needed. The contact stated that the transmission was stuck in neutral. The contact stated that while driving 35 MPH, the transmission was slipping. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed and determined that the valve body needed to be replaced. The dealer informed the contact that parts were on backorder. The vehicle was not repaired. The manufacturer was contacted, and a claim was filed. The failure mileage was approximately 72,000.

Filed Mar 12, 2025 · Engine · 44,000 miles · ND

The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact pulled over to the shoulder of the roadway, where the vehicle was able to be restarted. The contact became aware that the vehicle had entered LIMP Mode. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable duplicate the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 44,000.

Filed Mar 1, 2025 · Engine · MO

I was driving home from work at around 60 mph. Very sunddly their was a rattling metal sounds and then vehicle struggled to maintain speed. Before pulling off the highway at the next exit. On the exit ramp the engine turned off and would not turn back on. The vehicle was also stuck in neutral and not able to shift out of neutral for towing. There was no worning lamps or messages even after the noise and reduced power. Vehicle was towed to local dealership on Tuesday evening, as this was not scheduled it took them to diagnosis the issue as engine failure and recommending to replace the engine. The vehicle is a 6.2L GMC Yukon Denali with 23k miles. All service has been done at the dealer with no outstanding work prior to the engine failure. Where it gets more disappointing is the lack of information for time to fix. The replacement engine was ordered by the dealer on February 14th. As of February 28th they did not have any information....So i called GMC on that 1800 number listed on GM Document DCS6866 referencing customer satisfaction program N232413430. The first agent disconnected without filing a case. The second agent had to restart the process and was told that there was nothing they would do for 14 days after the case was opened before it would be elevated. When talking to the agent they denied any information related to the GM Customer Satisfaction Program or any knowledge of what seems to be a wide spread defect on 6.2L engines. The service and support for a $90k vehicle from, in fairness they have provided access to rental vehicle from a local auto shop. The vehicle is far smaller and different from our vehicle we purchased. The vehicle is still sitting at the dealership service center and is not functional until the engine is repalced.