2023 GMC YUKON Complaints

Passing a semi up a hill going 75 and the motor shuts off. As the Yukon slowed, the semi slowed down as well. It was difficult trying to get the Yukon to the right shoulder. There was no warnings or anything on the dash. The vehicle just quit running. Tried restarting and it was like the battery was dead. Got it towed to a dealership and they said the engine was ruined from 6 of the 8 rod bearings disintegrating. Took almost a month to replace with the problem being so common and no engines available.

Hi my 2023 GMC Yukon Denali Ultimate died in the middle of the road due to a catastrophic engine failure. That put my family and I in danger on the highway.

Yukon with 6.2 V8 suffered crankshaft bearing failure. Vehicle had only 9800 miles on it. No warning. Vehicle shifted itself into neutral and engine shut off. Engine replaced under warranty.

1. The authorized dealer repair center stated my engine has failed and needs to be replaced. It is currently at the dealer so it's unknown if it is available for inspection. I'm sure if the inspector would go to the dealer I can make that process happen. 2. The point of complete engine failure has not occurred as of yet to me so It is unknown how this would effect my safety. One would have to assume that engine failure could always be a safety problem if driving when it occurred. 3. The problem I reported has been confirmed by the authorized dealer. 4. The vehicle has been inspected by the authorized dealer repair center but I am not aware of any other people that performed same inspection. 5. There was a knocking noise come from the engine when I accelerated and loss of power when accelerating. The noise was first detected 12/24/24 and I made an appointment with the authorized dealer repair center online. My vehicle was dropped off the first available day on 12/26/24. I have time & date video of the engine issue if wanted.

While passing on a two-lane road at approximately 70 MPH, the vehicle stalled and acted as if the engine wasn't running. Pulled over to the side of the road and was able to restart the engine after shifting to park. Engine was harder to start than usual and cranked slowly. After restarting, the engine ran fine for the remainder of the trip, but would occasionally have difficulty cranking. After this incident, the engine developed a knock that would vary with engine RPM, and sounded like a defective connecting rod bearing. Pulled the dipstick and noticed metal shavings in the oil. Took the vehicle to local dealership who confirmed the engine was defective and would require replacement. Vehicle has been at the dealership since December 5th waiting for a backordered engine.

I’ve had the engine blown and replaced twice. The first time it failed in the middle of an intersection. We could not put it in neutral to move it. We had to call a tow truck. No check engine lights just a noise. The engine had failed bc the bearings couldn’t get oil. The second time it blew I was driving down the interstate and same thing only a noise so I pulled over and the car died. Also had to call a tow truck. It was the same as the first time the engine had blew because of the bearings not getting any oil. So now I’m on my third engine in a 2023, hoping that it doesn’t do it again.

As we were driving down a main road and taking off from a stop light on NW Expressway we had no warning before the car seemed to die and shift itself to N. It said to press the start button, that did nothing and the car would not power back up besides the lights and dash that were still working. We coasted to a stop in a neighborhood entrance. I'm so thankful I was not on the highway during rush hour traffic. Once stopped, we put it in park and tried to start it. A friend came and tried to jump it and still nothing. The dealership has confirmed it needs a full engine replacement. GM has agreed to help with cost but my car has sat inoperable for over 30 days as the engine is on back order with no ETA. It has a 6.2L engine and I had taken it in for pull consumption tests over the past 2 years. The dealerships were unable to duplicate the problem. Two days prior to the failure I had told my husband it was slow to crank and we needed to have the battery checked. I now believe it was the engine, not the battery. There were no warning lights on and my battery indicter showed to be in the middle (not lacking charge). I am aware of a voluntary customer satisfaction program that GM has issued but they have told me my VIN isn't one of the 5000 affected by this. In visiting with the dealership it appears they will not fully break down my engine until the new one has arrived but they are 90% sure of the cause as they've "seen several of these". This could have been catastrophic to have a car die with warning in traffic.

During the operation of my 2023 GMC Yukon XL AT4 on [XXX], carbon monoxide (CO) entered the cabin, exposing my children and me to dangerously high levels of CO and causing confirmed carbon monoxide poisoning. We were driving with the engine running and the heater on for approximately 21 minutes when the exposure occurred. Symptoms began to escalate that day and into the proceeding days, including severe headache, stomachache, pallor, chest pressure, shortness of breath, fatigue, and neurological issues. My children, particularly my [XXX] and [XXX] , experienced the most severe effects— both were very ill especially my [XXX] . Unfortunately, we initially did not believe it was possible for CO to enter the vehicle cabin, which delayed early intervention and appropriate medical care. Blood testing 4 days later confirmed elevated carboxyhemoglobin levels in my [XXX] , the only one tested. During the incident, the battery warning light was the first indication of trouble, but soon after, many additional error messages began flashing on the dashboard. The vehicle then overheated, decelerated, and eventually shut down while driving. We were in the vehicle under 21 minutes. Upon inspection after the incident, my husband noted a severed belt and potential pulley issues. The exact cause of the CO intrusion has not yet been identified. The vehicle is available for inspection and unaltered to preserve evidence. I am writing GMC and requesting further investigation by GMC. This incident reflects a severe safety issue with potentially life-threatening implications for GMC owners. CO exposure can cause significant harm, and delayed identification in this case placed my family at substantial risk. Immediate investigation and corrective action are essential to prevent similar incidents from occurring in the future. Time is critical, as this defect could have catastrophic consequences for other unsuspecting drivers and their families. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I have been told the MODULE ASM-COMN INTERFAC Part #86581706 has failed and is on back order, with no anticipated in stock date, and not available to be repaired. This controls the vehicles communication with Onstar which is currently not working. Onstar is sold as a safety feature of the vehicle. In addition I do not have access to the location services of the vehicle, also sold as a safety feature of the vehicle. The vehicle is available to inspection. The problem has been inspected by a GMC Dealer. There were no warning lamps, messages or promts when the module failed. I had to have the failure diagnosed by the dealer to locate the failure.

The contact owns a 2023 GMC Yukon XL. The contact stated that while driving 75 MPH coming to an intersection and attempting to apply the brakes, the vehicle failed to stop as needed. The message brake system failure and speed limited to 62 MPH were displayed on the instrument panel. The vehicle continued and drove through the intersection. The parking brake failed to stop the vehicle. The vehicle ended up stopping in a ditch and was towed to the dealer to be diagnosed. The contact was informed that the battery terminal had detached, causing 20 different modules to fail. The battery cable was tightened. The manufacturer was made aware of the failure and opened a case for a possible buyback. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 25,100.