2023 GMC Yukon Xl

My daughter and I were coming and got off of the [XXX] on the [XXX] exit ramp to go home. When we were pulling up the vehicle suddenly showed the check engine light and the vehicle turned off. It would not go into neutral, it would not restart. I am being told there is no active recall on it; however, in researching, it appears that I am one of many cases of this exact scenario. Being stuck on a busy exit ramp is not safe and had this have happened in the road construction on [XXX] , this could have been a much different scenario even fatal. This vehicle is a 2023 with 40,355 miles on it. The Denali is currently at the dealership it was towed to, and I am waiting on the diagnostic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My wife was travelling down a two-lane road at 50mph when the engine suddenly shut off affecting steering. She was able to maneuver to the shoulder, but the vehicle would not restart. Could have been much worse. Had it towed to the dealer we purchased it from, and they informed us the engine had seized. There were no warning signs or dash lights indicating there may be an issue.

•What component or system failed or malfunctioned, and is it available for inspection upon request? Driver and passenger side rear view mirrors will not hold memory and auto adjust while driving at times. Been to the dealership 5 times. They could not repair and just said that a software update should fix it, but it did not fix it. I will program the mirrors to the preferred settings but when I re-enter the vehicle after shutting it down, it doesn't always retain the memory, and they go to random positions. This usually happens after 5 miles of driving the vehicle. The passenger side mirror will go down so I could see the curbs while in reverse but when I go into Drive, it does not go all the way back up. I will be flying to visit family but the vehicle will be at a different dealership from 3/26/2025 to 4/1/2025. •How was your safety or the safety of others put at risk? After adjusting the mirrors, I left my garage with my kids in the car and started driving to our destination. While entering the highway, I went to check my driver’s side rear view mirror and noticed that it was pointed to a random position. In that moment, I was trying to match the highway speed to enter, there was a vehicle in front of me, a vehicle behind me, and a vehicle on the highway exit/entrance lane that I was trying to be cognizant of location to adjust speed properly. I ended up doing multiple shoulder checks which caused me to lose visibility of the vehicle in front of me multiple times. •Has the problem been reproduced or confirmed by a dealer or independent service center? The dealership says they can not reproduce but I was physically able to show the service writer, he saw it happen. I also asked the dealership to drive it around after reprogramming it, but I don’t think they did drive it because after I bring the car home from the dealership, it starts doing it again. I have a service write up where the service writer says he say it occur. •Has the vehicle or component been in

I am writing to express serious safety concerns regarding our 2023 GMC Yukon XL Denali, which has been in our possession for less than two years and has only 24,000 miles. On multiple occasions, while driving at high speeds on the freeway with our four young children, the vehicle unexpectedly lost power and shifted into neutral without warning. This occurred approximately four times on March 9, 2025, when we contacted OnStar for assistance. Despite their response indicating no alerts on their end, we were advised to reach out again if the issue persisted. Unfortunately, the problem did occur again on March 16th, which prompted us to contact OnStar and have the vehicle towed to the nearest dealership for further evaluation. The service department has since informed us that the motor requires replacement. Upon conducting additional research, it seems this may be a known issue with many vehicles manufactured by GM around the same time. We are deeply concerned by this safety hazard, especially given that the malfunction could have led to a life-threatening accident. While we are grateful that we were fortunate enough to avoid any serious consequences, we believe a solution beyond standard repairs is necessary to restore our confidence in the safety of this vehicle. Our family’s well-being and trust in the reliability of our vehicle are of the utmost importance.

During a cross country road trip on [XXX] we experienced the dreaded 6.2 gm engine failure. As I was driving I lost all power going up a steep grade in the fast lane of a 4 lane interstate. There was no room to pull over to the left side so I had to very quickly cross 4 lanes of traffic without any power. I was able to get the yukon off the interstate as safely as possible. Once I placed the vehicle in park it shut off completely. I tried to restart it several times. Finally got a message on the dash saying engine oil cooler was hot or oil was overheated. Called gmc and got a tow to nearest dealership. I rented a vehicle on my own dime and drove that back to north dakota where we live. We are still in the process of getting some of our expenses reimbursed. I called an Uber to pick my wife and 3 daughters up to get them to a near by hotel. My son snd I stayed with the vehicle on the side of the road till the tow truck arrived. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While on the expressway driving at highway speed the engine started backfiring and many codes were displayed on dashboard including “ rear drive disabled” “ service ECU” and many others. Pulled over and Had GMC Yukon towed to dealer. I’ve seen many complaints of the same thing and found this recall on your site GENERAL MOTORS DCS6866 URGENT - DISTRIBUTE IMMEDIATELY Date: April 24, 2024 Subject: N232413430 - Customer Satisfaction Program The dealer said they would fix broken valves and I would have to pay for the new computer that’s not under warranty.

Engine stopped and vehicle went into neutral. Family of 5 in the vehicle on a busy highway. Once pulled over safely from the highway and shut off ignition, the vehicle stayed in park and would not shift to neutral, the engine would not restart. Vehicle had to be towed into the GMC dealer. No warnings, messages or symptoms prior to the failure. The vehicle was just at the dealer for routine maintenance 4 days prior. Dealership found that the engine had seized.

While in use on several different occasions, the front windshield wipers malfunction. They stop working for hours sometimes even days. This is a hazard especially if you are in the middle of driving and it’s storming. The a few days ago for instance I was driving and all of a sudden they stopped working while I was driving home in the rain, at night. I had to immediately pull onside the road and wait for the rain to stop because I tried everything to get them to start back working. Including observing and trying to make sure it wasn’t the wiper /signal switch. I even went under the hood and checked to see if the fuse had blown or if there was some kind of wiring undone. Still nothing. I have taken it to the dealership and several people complain about the same thing but no remedy has been presented. They just all of a sudden start back to working out of the blue. This is definitely a safety hazard and these wipers or wiper motor should be recalled and fixed immediately in my opinion. Please help. Save some lives before it’s too late. Thanks for helping with this matter.

Upon acceleration the engine began to sputter with a clanking noise. After turning around to pull back into my drive way the engine began to work properly. I had the vehicle towed to Master GMC Augusta,GA. After the car was at the dealership for several days, I was told the issues could not be duplicated and there were no error codes. While returning home from the dealership the car began to sputter and decelerate at this time multiple lights flashed on and off on the dash including the check engine light. As I pulled to the side of the interstate the car once again corrected itself and all lights went out. I reached out to the dealership again. The car was returned to Master GMC again. This time I was notified the engine had failed due to metal shards in the engine. Since this vehicle had only 4988 miles at the time, and I had a 2021 Suburban prior with lifter failures, I was hesitate to keep this vehicle. I did trade the 2023 Yukon XL Denali at the time of engine failure.