2023 GMC YUKON Complaints

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.

I was driving over the Cooper River Bridge and a loud explosion occured, almost like a loud gun shot. The entire first window of my sunroof exploded. Nothing hit it, no cars were around and it was around 9pm at night

Catastrophic engine failure and sudden loss of propulsion on a highway after completing GM's OW-40 oil recall remedy.

PICO scope test #FDYZ295894391 on engine for recall #N252494003 engine , passed test. Drain oil filled with 0-40 replaced oil cap. Date 09/19/2025, mileage in 20142/mileage out 20142. Vehicle runs rough. Not stable at times. Vibration noise coming from the motor at times.

Recall notice received, went to dealer to have inspected and was told it passed the recall inspection. Oil changed from 0w20 to 0w40. Motor locked up less than 3000 miles later. My wife was 2 hours from home on the interstate on a Saturday night. Was forced to the left shoulder of the road pinned between concrete dividers and the fast lane. Had to wait 2 hours for a tow truck, $500 later the Yukon was delivered back to our driveway. Mind you, the electronic transmission can’t be shifted so it was dragged on and off a rollback in park 4 times. Dealer had it towed to their shop where they discovered the blown motor. 2 months later the replacement motor was installed.

I was Driving down the interstate when the RPMS on my car increased and my car started to shutter. I went to get off the roadway and it put itself into neutral and lowered my speed. when i got On the shoulder it stalled and would not turn back on. I had To be towed. To this point, my car has been in the shop for over a week with no solution.

My vehicle previously experienced engine problems severe enough that the engine was replaced. Despite the engine replacement, the vehicle is continuing to experience an engine misfire, and the check-engine light has been flashing. A flashing check-engine light and active misfire are a serious safety concern because the vehicle may experience rough running, reduced power, hesitation, or potential loss of power while driving. The fact that the misfire continues after an engine replacement raises concerns that the underlying problem was not resolved or that another component or system is malfunctioning. The exact cause of the current misfire is UNKNOWN at this time. The vehicle and/or affected components are available for inspection upon request.

At approximately 58,565 miles, my 2023 GMC Yukon Denali equipped with the 6.2L L87 V8 experienced an internal engine failure. The vehicle had previously completed the applicable L87 engine recall remedy earlier in 2026. The vehicle developed a thumping noise and was inspected by an authorized GMC dealership. The dealer confirmed metal contamination in the engine oil and diagnosed a main thrust bearing failure. The condition was confirmed by the dealer and required complete engine replacement rather than a minor repair. The vehicle was out of service for approximately 31 days while the engine replacement was completed. GM authorized and covered installation of a complete factory replacement engine. The failed engine is available for inspection if requested. The failure created a significant safety concern because an internal engine failure of this type can result in loss of motive power while driving, potentially creating a hazard for the occupants and other motorists. I am aware that NHTSA is currently investigating L87 engine failures occurring after recall remedies. I am submitting this complaint because my vehicle experienced a documented internal engine failure after the vehicle had already received the applicable recall remedy and subsequently required a complete engine replacement. The replacement engine has not currently failed, and I am not reporting a failure of the replacement engine. However, I am concerned about the effectiveness of the remedy and whether the replacement engine incorporates updated or revised components intended to address the underlying failure condition. I have requested documentation from the dealership regarding the exact replacement engine assembly and whether it incorporates engineering or production changes related to the original bearing failure. That information has not yet been provided. No crash or injury occurred as a result of this failure.

My 2023 GMC Yukon AT4 with the 6.2L V8 has experienced multiple serious engine-related failures. The original engine previously was making a whining / knocking noise, then seized and required complete engine replacement under a GM recall/campaign involving 6.2L engine failures. The replacement engine later developed a lifter/valvetrain failure and required lifter replacement. The vehicle is now again exhibiting a pronounced rhythmic mechanical knocking/tapping noise, primarily during cold starts after sitting for an extended period. The noise occurs on most cold starts and has been documented in multiple videos. The vehicle is currently at a GMC dealership for inspection. I provided the dealer with several videos clearly demonstrating the noise. The dealer has stated that it has not yet been able to reproduce the condition and is attempting additional cold-start testing. The exact cause is currently UNKNOWN. No consistent warning lights or dashboard messages have appeared with the current knocking condition. My concern is that this vehicle has already experienced a catastrophic engine seizure, followed by internal valvetrain/lifter failure in the replacement engine, and is now again exhibiting abnormal mechanical engine noise. I am concerned this may indicate another developing internal engine failure that could potentially result in engine seizure or sudden loss of power while driving, including at highway speeds or in traffic. The vehicle and engine remain available for inspection, and multiple video recordings of the recurring cold-start knocking are available.

The powertrain malfunctioned and it at the dealership for an engine replacement. The vehicle lost propulsion on a 2-lane road while passing another vehicle. It cut off completely and started to decelerate. There was no warning or indication that this would happen and was dangerous in that I was accelerating to pass another vehicle when the event occurred. I was able to safely pull into a driveway, but the vehicle would not crank as it could not detect what gear it should be in. It was towed to a GMC dealership locally who confirmed 2 days later that the engine would have to be replaced. It is under warranty and will take 3-4 weeks.