2023 GMC YUKON XL Electrical System Problems

Vehicle has 56000 miles currently and at 47000 transmission had to be replaced due to defective valve body. At 56000 miles, motor was replaced due to broken lifter. The vehicle currently will not start.

Details of the Issue: Vehicle Model: 2023 GMC Yukon Problem Description: The battery has drained completely on three separate occasions, leaving the vehicle unable to start and in cold weather areas safety is a concern. This occurs even when all lights and accessories are turned off, and the vehicle is parked for a reasonable period of time. The vehicle has been brought to the shop three times to address this issue. During one of these visits, a module failure was identified and repaired. However, the issue has occurred again since that repair, indicating that either the original repair did not fully resolve the problem or there may be additional underlying causes. Frequency: The issue has occurred three times to date, most recently on [insert date of the most recent incident]. Service History: The vehicle has been in the shop three times for this issue, and a module failure was identified and repaired during one of these visits. Troubleshooting Steps Taken: I have ensured that no lights or accessories are left on when the vehicle is parked. The battery terminals have been inspected for corrosion, and the connections are secure. [Include any other steps you’ve taken, e.g., "The battery was tested and confirmed to be in good condition."] Request for Assistance: Given the recurring nature of this issue and the fact that it has not been fully resolved despite multiple service visits, I would like to request the following: A more in-depth diagnostic to identify any additional root causes, including potential parasitic drains, alternator performance, or software-related issues. Confirmation of whether there are any recalls, technical service bulletins (TSBs), or known issues related to the electrical system or battery for this model. Consideration for extended warranty coverage or goodwill assistance to address this issue, as it appears to be related to a manufacturing defect. Since warranty coverage is up my vehicle cost is going to increase due to repeatable issues.

tThe dealer ship refused even talk to me

Classic Buick GMC (Classic Elite Buick GMC – Katy) Filed by: [XXX] [XXX] [XXX] Phone: [XXX] Email: [XXX] Date: November 23, 2025 Texas Attorney General – Consumer Protection Division RE: SUMMARY COMPLAINT – Vehicle Misrepresentation, Unauthorized Charges, Financing Fraud & Warranty Violations Dear Attorney General, I am filing this complaint against Classic Buick GMC (Classic Elite Buick GMC) located at [XXX] , for multiple violations of Texas consumer-protection laws during the sale and follow-up service of a vehicle I purchased in March 2024. Summary of Violations 1. Misrepresentation of Vehicle Model Year I was sold a 2023 GMC Yukon Denali that the dealership falsely represented as a brand-new 2024 model, including on the key-tag. This violates Texas Occupations Code §2301.351(a) and DTPA §17.46(b)(5), (7), (24). 2. Unauthorized Add-Ons & Hidden Charges The dealership added $8,000 in accessories and $26,000 in warranty products without my consent. This violates DTPA §17.46(b)(12). 3. Financing Fraud I was promised 1% financing, but the dealership charged a significantly higher rate at closing without disclosure. This violates the Truth in Lending Act (TILA). 4. Warranty Refusal & Pre-Existing Damage Although the vehicle had defects and mechanical issues at delivery, the dealership refused to repair them under warranty unless I paid. This violates the Magnuson-Moss Warranty Act. 5. Failure to Provide Required Documentation The dealership refused to provide complete purchase documents, violating Texas Administrative Code §215.142. 6. Pattern of Evasion I personally visited the dealership three times, yet management refused to correct any misconduct. 7. Unsafe Vehicle Retained at Dealership The Yukon remains at the dealership due to mechanical/electrical defects. I refused to pick it up because the vehicle is unsafe and not as represented. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2023 GMC Yukon XL. The contact stated that while driving approximately 25 MPH and depressing the brake pedal, the vehicle failed to respond. Several unknown warning lights were illuminated, and the message "You Have no Brakes - Do Not Drive Over 40 MPH" was displayed. The contact allowed the vehicle to roll to a stop. The contact turned off and restarted the vehicle, but the failure persisted. The contact parked the vehicle. The contact stated that the failure had not caused an accident because the contact was driving early in the morning and there was less traffic on the road. The contact stated that her husband started the vehicle later in the day, and the warning lights were off. The vehicle was driven to the dealer to be diagnosed. The dealer diagnosed the vehicle and informed the contact that several DTCs were retrieved, including a DTC for brake failure; however, the flow chart from the manufacturer instructed to first replace the battery and then reset the codes. The dealer replaced the battery, reset the codes and test-drove the vehicle. The vehicle was repaired and returned to the contact. The manufacturer was notified of the failure and supported the dealer's assessment. The failure mileage was approximately 70,000.

Mileage: 70,000

The contact owns a 2023 GMC Yukon XL. The contact stated that while driving approximately 25 MPH and depressing the brake pedal, the vehicle failed to respond. Several unknown warning lights were illuminated, and the message "You Have no Brakes - Do Not Drive Over 40 MPH" was displayed. The contact allowed the vehicle to roll to a stop. The contact turned off and restarted the vehicle, but the failure persisted. The contact parked the vehicle. The contact stated that the failure had not caused an accident because the contact was driving early in the morning and there was less traffic on the road. The contact stated that her husband started the vehicle later in the day, and the warning lights were off. The vehicle was driven to the dealer to be diagnosed. The dealer diagnosed the vehicle and informed the contact that several DTCs were retrieved, including a DTC for brake failure; however, the flow chart from the manufacturer instructed to first replace the battery and then reset the codes. The dealer replaced the battery, reset the codes and test-drove the vehicle. The vehicle was repaired and returned to the contact. The manufacturer was notified of the failure and supported the dealer's assessment. The failure mileage was approximately 70,000.

Mileage: 70,000

My telecommunications module is no longer working for OnStar, which means I can no longer call if something happened. The Wi-Fi is not working. The vehicle thing is on recall and now my check engine light is on.

OnStar module doesn’t work it went out in January 2025 there’s a 1000’s of other users in the in the OnStar module community complaining of the same issues . When you take it to the dealership they will not assist and will not warranty it out

The onboard accident emergency notification system has failed after 2 years. The SOS and Onstar are not functional. Car has no data communication with the network. Was confirmed by Crenwelge Motors in Kerrville Texas. It is a GMC dealer. This is an ongoing problem with many Yukons made from 2022 to 2024. GM has not addressed the issue with a recall and does not have the parts to repair this safety system.

My vehicle’s engine failed for the second time while driving on the road. The first time a few months ago while my wife was driving. The engine failed and brakes failed. Fortunately she was on a back road a coasted to a stop. Car was towed to dealership. They said there was no problem. Received recall letter about a month ago outlining this issue. Yesterday, [XXX], I was driving with my daughter and the car stopped again while driving. I was in traffic and narrowly missed an accident. Gwinnett county police came to the scene and towed the vehicle to the dealership. I am not sure if the female officer made a report. But she requested the tow truck because I was blocking traffic. We often drive on the highway for work commutes. This could have happened and anyone in my family could have been fatally injured. I would like GMC purchase this vehicle back or replace with a safer model comparable or better. The service department called me this morning from Jim Ellis GMC in Buford, Georgia 678-902-8677, 3600 Buford Drive 30519.I was told that there is no recall for my truck. He told me that there is a safety investigation for a recall. I told him I can bring the letter. He decline. I asked for a courtesy vehicle. He said no, he would have to make a report and it would be up to 48 hours. Once it’s reviewed , then I could go to enterprise car rental to pick up a car. Maybe. The first time Rick Hendrick GMC Duluth , Ga 470-822-3779, 3344 Commerce Ave, Duluth, ga had my truck for about 2 weeks. No fix. No courtesy vehicle or rental. Now I’m without my vehicle for unlimited time. The Jim Elis tech, did acknowledge that there is no fix for what is going on. The local GMC dealers are not making this easy or putting the safety of its customers as a priority. These trucks are NOT safe on the road. This truck cost nearly $100,000 and it is not safe to drive.GMC has a record of the 1st service incident and this latest just happened yesterday. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(

Speed control became stuck and I had to hit my breaks to stop acceleration. Vehicle stopped shifting while driving down the road periodically. Warning collision lights and traction control lights randomly come on with nothing in front of vehicle. Yesterday vehicle would not start or even unlock. When I did get the vehicle to start by manually unlocking it and trying over and over it would not go forward or backward although the engine did rev up. All warning lights were on including traction control and check engine. It did randomly start moving but the “service steering column” light and check engine light are still on . The car periodically revs up while going down a hill when it needs to downshift instead. It has completely shut off driving down the road through town and stopped. I had to hurry and turn it back on as there were cars behind me. It’s a 2023 and I don’t feel safe driving it with my kids.

I was driving on a highway with my [XXX] son and 2 dogs when without any warning the vehicle just stopped and completely went dead. I was unable to turn on the hazards so I called 911, the police came within minutes and surrounded the vehicle to keep us from being crashed into. The brakes failed to work, the hazard lights would not work, the doors would not open other than the driver door. The police had to help remove my child and 2 dogs from the vehicle through the driver door. The vehicle could not be put into neutral so the police had to tow the vehicle from the middle of the highway. The result could have been deadly. The vehicle was completely dead with absolutely no function. After the police towed it to the police tow facility it was then towed to the GMC dealership I purchased the vehicle from. The dealership is Jim Curly GMC in Keyport NJ. The dealership has had the vehicle since Saturday and is claiming to not know what is wrong with the vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving at approximately 30 mph in moderate traffic on the interstate during a return leg of a 370-mile trip, my vehicle unexpectedly shifted into neutral and became unresponsive. The dashboard displayed the warning message: "condition not correct for shift," and despite repeated attempts to restart the engine, the vehicle would not engage. Although the electrical system remained active, I had no propulsion. Critically, the vehicle became immobilized in a **very dangerous curve on the interstate**, presenting an extreme safety risk to myself and others. The car could not be manually shifted into neutral for towing, prompting Illinois Department of Transportation (IDOT) to declare the location unsafe. I was stranded there for over three hours, after dark, in a vulnerable and exposed position. During the forced tow process, two rear tires were destroyed and the two front tires sustained major damage. In the days leading up to this incident, the vehicle had also shown signs of malfunction, such as delayed acceleration from a stop and occasional lurching forward — symptoms consistent with the defect described in the recall.

The contact owns a 2023 GMC Yukon XL. The contact stated that immediately after purchasing the vehicle, the battery failed and was replaced on two separate occasions. Additionally, while driving or reversing, the braking system erroneously activated, causing the vehicle to abruptly stop. During the failure, there were no other vehicles or large objects nearby to cause the Forward Collision Avoidance system to activate. The vehicle was taken to the local dealer on several occasions, but no failures were found. The vehicle was not repaired. The manufacturer had not yet been contacted. The failure mileage was 50.

Mileage: 50

Good afternoon. Our rental car we picked up from the Denver International Airport on [XXX] had numerous incidents of emergent braking at highway and non highway speeds which were reported to Sixt ( car rental) and documented on the dates in which they occurred, [XXX] (7-8 occurrences ) and [XXX] (3 occurrences-2 after a car wash). On the day in which the first occurrences happened, the car rental company representative from Sixt, 3way connected me with a mechanic from Annex who advised washing the vehicle to ensure the sensors were clean. I did proceed to wash the vehicle on 1.25.25. This same company, Annex Automotive, then evaluated the vehicle on 1.29.25 after emergency breaking occurrences continued of which [XXX] was the worst. On [XXX] there were no vehicles in front of or behind us nor to the sides of us and the roads were completely clear. It was also dark out. Attached you will find evaluation with validation there is a mechanical concern with the vehicle. On [XXX] the extremely unsafe occurrence of emergent braking occurred with skidding tires and the doors locking and unlocking at the same time occurred. This vehicle was completely unsafe to drive. I, as well as my passengers/family, are very lucky the road conditions were moderate on [XXX] and clear on [XXX], or these emergency Breaking issues could have caused a serious accident. There were a total of five of us in the vehicle when all of these occurred. I am from Minnesota and have a Yukon XL so I am comfortable with this vehicle This was the scariest vehicle experience I have ever encountered. The company did tow the vehicle on 1.29.25. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle went to GM for recall repairs on 02/24/25 the morning after when I cranked my car it was dead. Jumped the car off then began hearing a "clicking noise" GM advised I replace my serpentine belt as they noticed it needed replacement when doing the recall repairs. 02/26/25 serpentine belt was replaced but car still seemed to have power issues when cranking. 02/27/25 car barely cranked then while driving down the highway I lost all power and power steering to the vehicle. There was no warning, no check engine lights etc. The screen went black then car shut off then the screen said "press start to restart." I was BARELY able to get the vehicle safely off the road with vehicles in front, behind, and in the other lanes. It could have caused a fatal accident. GMC still has my vehicle with NO UPDATE on replacement engine timeline.

•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

We were driving uphill on the highway, about 60 mph when the engine appeared to loose some power for about 10 seconds even though the engine was reving higher, and the ln the engine cut out. We coasted to a stop and then the electrical system was cutting out. I tried to restart the engine but it would not turn over at all, and the car’s electrical was intermittent. There was no warning or error lights before or during the engine failure. Photos provided are the messages on the instrument cluster when attempting to restart the engine. Vehicle was towed to the local GMC dealership, and they are replacing the engine under warranty. No eta on the engine replacement at this time.

At 9,900 miles my safety camera system failed which disabled the cruise control and all safety features that used the camera. Car was out of service for nearly two weeks and subsequently fixed by the dealer under warranty at no charge. At 11,300 miles I was driving on an interstate highway in the left lane at rush hour, without warning the car stopped accelerating the car shifted into neutral and totally lost power. It was a very dangerous situation with me in the left lane in heavy traffic. I am a skillful driver and thankfully I was able to make it off the travel lanes on the highway. The temperature was 18 degrees at the time and I had to wait outside for a tow truck. The engine seized without warning or noise and this presents a severe danger to the driver of the vehicle and other vehicles on the highway. There was a substantial possibility that other vehicles could not avoid me as I was exiting the travel lanes. There was also a substantial possibility that the vehicle would simply be in the travel lane stopped on a divided highway.

The 2023 GMC Yukon had a complete loss of power and engine while driving 65 mph on a highway. The vehicle was unable to restart or be placed into neutral. No previous issues and no indications of failures. No fault codes or lights indicating any issues. Dealership informed me that the engine stopped working and gave an estimate of greater than 4 months for any replacement or repair.

I have had this vehicle serviced twice for the electrical issue on the running boards. While driving and while parked the running boards constantly deploy and store on their own or get stuck at a half way position. This will happen even if I have them turned off or on.

Engine shut off at freeway speeds (65mph) on 2 occasions. Driver was able to coast over to side of freeway both times. On 1st occasion CHP protected vehicle from other traffic on i-5 with safety lights and traffic control. On second occasion, tow truck came quickly and kids were evacuated to prevent heat stroke in 113 degree weather. The first incident was “repaired” with a new starter and battery fuse block at 21720mi, but only lasted to 21814mi before same event occurred. No warning of failure before or after incident, just a dead engine. Second event (7/2/2024) is still being investigated by dealership.

The contact owns a 2023 GMC Yukon XL. The contact stated while driving 86 MPH in the middle lane, the vehicle shut off on five occasions. The vehicle was restarted, the steering column was locked, and the brake pedal was depressed but failed to respond. The contact stated that the rear axle had disengaged. The suspension leveling system had failed. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that there was an electrical failure. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was 39,000.

Mileage: 39,000

I recently purchased my vehicle and after already transporting my family of 5, including my newborn child for several days, I noticed that my parking sensors were not working and I began receiving a message of my dash that parking assist, rear braking and auto park assist were unavailable. I reached out to GM around 4/4 informing them of the issue and they said they didn't have any recalls or retrofits for my vehicle and advised me to take it to a dealer's service deparment to be reviewed. After having an issue with Simpson GMC of Buena Park of failing to even review my issue for a week, I took it to Penske GMC of Cerritos on 4/17 and they determined that during manufacturing of the vehicle, someone failed to connect the module that controls my parking sensors. They had to remove the front fascia of my vehicle to connect the module for everything to work correctly. This has forced me to call into question the quality control of GM vehicles and also concerns me that a car manufacturer would deliver a vehicle with such gross negligence where a consumer would not know the safety features they rely on to keep themselves and their family safe do not work. GM Customer Service also never followed up on my issue even after calling and emailing them several times, which again calls into question how General Motors operates their business.

While driving in a gravel driveway, the window curtain airbags and the middle console airbags deployed, with no collision what so ever causing injury to the driver and should you have a child this could have been very damaging as the airbags came out in all the way back through the vehicle. This incident was inspected by police and fire as OnStar called them as it detected a collision, and without the vehicle being moved from the location the officer said there is nothing that should have caused the airbags to deploy, there is absolutely nothing here in this driveway that could have possible caused airbag deployment, The running boards go in and out, even when on the interstate constantly, and when backing up or going forward at times, and especially in a gravel driveway your automatic breaks will stop you abruptly, so fast that your seat belt will lock up on your and thrust you forward and backwards. The rear entertainment system will screen at times when turning it on will stay black and you have to keep turning it on and off to get a screen to show. No warning lamps or messaging with any of these cases.