Warnings Problems of GMC Yukon

On [xxx] brake system failure, service esc, forward collision system unavailable and check engine lights came on the dashboard and the vehicle had no brakes. Taken to dealership and conley GMC advised the main module was burnt out. $1200. 00. Car was “fixed” and sent out. The next morning all the check engine light along with all other failure lights came on after module was replaced. Taken back to dealership and they advised that everything had to be manually programmed which was done and sent out. [xxx] same dashboard errors were up again. Taken back to dealership and they advised they needed to reprogram manually that was done and sent out. The next morning all lights were back on. It was the weekend so they wouldn’t take the car or provide a rental. May 23rd car was taken back to dealership and conley advised the master cylinder was bad and had to order parts. $4300. 00 in repair cost along with 2. 5 week at the dealership and $150. 00 in rental cost. I found online that gm knew of this issue with the 2022 GMC Yukon xl vehicles and a recall was made however this vehicle VIN number was not included in this recall. I notified conley GMC and they stated they were not informed of this issue. I made a claim with gm and told them of this issue and my safety concerns and they advised that because this was not included in the recall that there was nothing they could do and they would not be covering financial assistance or reimbursement and they called this an inconvenience instead of a real safety issue as each time my vehicle had no working brakes. No working brakes causes safety concerns for everyone in the vehicle as well as other vehicles. All work orders are at conley Buick GMC in bradenton, FL. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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What component or system failed or malfunctioned, and is it available for inspection upon request? the vehicle experienced a malfunction associated with a failed over-the-air (ota) software update affecting electronic control modules. The (ecm), (bcm), and related electronic systems appeared to lose stability during operation. The vehicle attempted to reboot while being driven and displayed multiple system warnings. The vehicle is currently at the dealership and is available for inspection upon request. How was your safety or the safety of others put at risk?while driving, the vehicle began malfunctioning and attempting system reboots. The dashboard flickered, warning lights, and the vehicle exhibited unstable behavior. During a prior event, the vehicle experienced unintended acceleration and abrupt deceleration. This created a risk of loss of vehicle control, particularly in traffic. I have small children in this vehicle, and the unpredictable electronic behavior while in motion posed a significant safety concern. Has the problem been reproduced or confirmed by a dealer or independent service center? the dealership confirmed that a previous event was caused by a failed ota software update. The vehicle has since malfunctioned again while driving and has been taken back to the dealership for further inspection. The dealership has acknowledged module instability and opened a tak case with the manufacturer. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? the vehicle has been inspected by Gmc1 dealership. A case has been opened with gm customer care. No police or insurance reports. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? 9 days prior to the first major malfunction, the check engine light illuminate. On April 1, the check engine light re-appeared and the vehicle attempted to reboot again while driving.

See all problems of the 2023 GMC Yukon 🔎.

The onstar module of my 2023 GMC Yukon has failed. This is a wide spread issue with recent model GMC's. There are thousands of reports of the same thing happenings. When an onstar module fails, the vehicle loses its safety features. No lane departure, no collision detection or pre-collision braking, no critical system checks. Even the gas and mileage components stop working correctly.

Purchased new August 29, 2025 on 12/3/25- mileage 4495. Took vehicle in for first maintenance service. Tire rotation and oil change. On 1/7/26- reported grinding noise we had began noticing when starting vehicle. Engine light service esc. Service traction control. Reported to ben mynatt gm. On 1/8/26 mileage 7120- took Yukon in for service due to grinding noise. Due for 6 module updates and 3 stand alone updates. On 2/16/26 noticed ticking noise when heat in on high. Scheduled service for 2/26. On 2/24/26 smell from car, oil reporting low. Dip stick completely dry. Sent email and photos to ben mynatt service. On 2/26/26 took vehicle in for service. Service advised to start oil consumption test. Ordered blower motor for the squealing noise. Cyl 3 misfire. Was told by the dealer, possibly needs engine 2/27/26 took vehicle in for service check engine light on. Bearing inside blower motor and blower motor replaced. Replaced coil cyl 3 tire rotation 2/28/26 car shaking, smoking, engine light on. Terrible smell from exhaust. Engine light came on, service esc, service traction control, forward collision unavailable, reduced acceleration drive with care alert. GMC alert: service the engine and transmission system immediately alert, engine light on. Vehicle approx miles. Codes misfires to cylinder 3. Took vehicle right to service dept. Codes cleared. Replaced coil on cyl 3 March 7th - mileage 11,200 car shaking vigorously! engine light flashing. Loud knocking coming from vehicle. GMC alert: service the engine and transmission system immediately alert. Emission system- service now. Engine and transmission system service now. Service antilock braking, stabilitrack stability control systems and airbag system. Service air bag system. Emailed to service March 9th. Took vehicle in. Cylinder 3 & 8 misfire code cold start rough idle code. Oil consumption using approx1 qt of oil/500 miles. Vehicle unsafe risk of engine seizure, fire risk and loss of acceleration is extreme danger.

See all problems of the 2025 GMC Yukon 🔎.

We were driving on the highway when the service lights came on along with the check engine light started flashing. The truck sounded like it hesitated a little, but the lights turned off and it drove his normal. We exited the freeway as we were close to home came home, parked it turned it off and turned it back on to test it, and it hesitated to turn on so we took it straight to the dealership where they repeated the issue. We left it there. They did not call me so I went up to the dealership the following day to check on this and I had not heard from them they told me why they were on the test drive that the engine had locked up. My vehicle was a part of the initial recall. They told me that it passed the inspection and they changed the oil to the new oil that was required and now at 12,000 miles my engine has failed.

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I had an incident in my 2020 GMC Yukon, where the forward collision crash alert went off and there was total loss of brakes. The brake pedal went to the floor. After the crash alert ended, the brakes returned. This happened on the highway and could have turned into a disastrous event. The dealership has been unable to diagnose or recreate this issue. They claim they did not find anything and the vehicle is safe to drive. I have turned off the collision detection system in the meantime. I feel strongly that this is a software issue that needs addressed. Gm has replied that they support the dealership but if I want a second opinion I can go to another dealership for input.

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Two weeks ago I heard a faint ticking sound. I had a professional look at it and they said that I had a cylinder sticking and to add an additive the next oil change. I still had 1,500 miles until then and so I did not do that. That noise stopped a day later. Last Friday, it started to tick again, and then it got very loud. I live rurally and was 45 minutes from home. The engine went from ticking to full clunking and very low power in just a moment. I luckily found a small engine shop to check the codes, but as I was parked there, the car would not go in reverse! he had to clear the codes to get it to go into reverse. I had to then slowly drive 45 minutes back to our small town. I drove to and immediately parked it at our local repair shop. It can not be driven now. The lights that came on were the rear axle system off, forward collision system, service traction control, engine light flashing, and service esc light. Not to forget that it would not go into reverse. Also the suspension system seemed to malfunction and not lift or lower the car. It seemed to clunk and try, but nothing happened. The whole car basically went down. I see there is a recall for this year or car, but my VIN is not included. I am hoping that it will be included as the repair shop is telling me it will be close to $10,000.

I was test driving the vehicle after some and as I was test, driving it, the steering lot up on me. Luckily, I was entering a residential area when it occurred down the street from my residency; in which I was able to drive it to my residency, during that short ride, you could smell a burning smell coming out along with some crackling noises. I had to get the vehicle towed a week later to the mechanic shop where they fix one of my engine problems and verified that I needed a new power steering unit and gave me a quote, I couldn’t afford the word and started doing research and came across the recall for the power steering within my vehicle year, make and model. I replaced the power steering unit, but I’m having a difficult time celebrating the system. .

See all problems of the 2016 GMC Yukon 🔎.

I was driving and a message popped up "service traction control", then another message popped up "forward collision system unavailable". Then the car started making this knocking sound and every time I would try and accelerate there would be a loud sound and almost a pulling stopping it from picking up much speed. I took the car into the dealer/repair shop and they said it was an issue with the lifters that had to be replaced and potentially an issue with the cam. They said this repair would cost upwards of $6,000 and I have never had this issue with the car before. This came out of nowhere and the car had not been showing any signs of this occurring before. This is a 2021 GMC Yukon and I drive my wife and three sons in that car daily.

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Traction control system esc system suddenly and without warning, multiple warning lights started flashing including check engine. The vehicle lost power and traction. There was a loud knocking and metallic whining sound. The vehicle began to vibrate and struggled to move forward and felt like the wheels were slipping. The loss of these functions was alarming because it was dark, we were in a construction zone, and my 15-year old daughter was driving having recently earned her driver's permit. The car following us almost rear ended us. It was such an abrupt engine failure it scared me and my daughter.

November 12, 2025 - turned on car and immediately noticed multiple system failure notices and very slow ability to brake. Immediately took to dealership - said battery needed to be re-charged. December 9, 2025 - turned on car and once again immediately noticed multiple system failures and very slow ability to brake. Failures were "brake system failure, 43 mph top speed, forward collision system unavailable, service brake pad monitor, service esc, service traction control, service sterring column lock" immediately took to dealership. Over the last 25 days in service all the dealership has told me is that their master technicians have looked it over and do not know the root cause. They are waiting for a new technician from gm. They also have another Yukon at the dealership with the same safety symptoms. No issues with the car prior to these two instances of failures. Car should not be driven.

While driving vehicle on 11/08/2025, vehicle made a popping noise and loss power. We were out of town and had to pay out of pocket to have vehicle towed to a dealership and hour away from our home. Dealership diagnosed issue with engine failure due to lifter fell and caused damage to cam shaft and bore. I will be without a vehicle for an additional 2 to 4 weeks waiting on a back ordered engine from gm, and continue making payments on vehicle as well. This issue seems to be an ongoing problem that gm is ignoring……. Gm should compensate towing, car rental, and repair/ replacement charges due to failure.

The forward collision automatic breaking sensor has already failed with only 15,000 miles. As well as the backup camera - it has already been replaced once.

I have had problems with the navigation system where the screen goes blank. The radio is not responding and screen is black. When turning on the signal light you can't hear it. The speed limit in my town is 25 and after an update from the dealership it now says 55. I get an alert saying frontal crash not available atleast once a month. There are times when we are driving and we get the red alert as to detecting an object and there is nothing there. Parking assits does not work all the time.

On August 9th at 5:30pm roughly, while attempting to park using the vehicle’s park assist feature, the system failed to function properly—specifically, it failed to detect a pole at the rear of a parking space, did not slow or brake the vehicle, and was not even aware it would contact the pole. It then collided with the pole. Also, intermittently the forward collision alert system either does not alert for similar circumstances as it just previously did. Seem untrustworthy. Scary. Gm's product allegation team (pac) had all of the necessary information to show the system does not work 100% of the time (I have it all on video and submitted that) and they denied my claim and refused to admit a system failure even when given the videos showing the park assist failing to engage properly on video.

Reporting engine failure with my 2019 GMC Yukon xl. Reporting engine failure after 106,500 miles. Yukon was properly functioning and well cared for with frequent oil changes and tire rotations. On [xxx] I was driving home with my [xxx] daughter coming back from her dance recital on [xxx] at [xxx] in minnetonka, mn when the "forward collison system unavailable" warning notification came present on my dash. The vehicle started to sputter and an abundance of smoke was coming out of the rear exhaust. Fortunately, I was able to make it home safely. I brought the car in the following day and it was diagnosed that the engine failed and complete repair of camshaft, cylinders, engine coolant lines and oil pans would need replacement. I did notice that the vehicle years 2021 to 2024 are currently under recall for similar issues. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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The vehicle main information cluster randomly goes in and out and now has completely stopped working. This is the information display that shows park, nuetral, drive, reverse, fuel gauge, digital mph and other information such as oil tire pressure, turn signals, forward collision. Just knowing if the vehicle is in park reverse or drive is a huge saftey issue. This seems to be a common problem on gm vehicles and I wcan't seem to find a recall issued for the saftey factor that the vehicle can be assumed to be in park and it's actually in reverse. The first time I noticed this problem was sept. 05, 2020 but it had reset when I restarted the vehicle. The problem would resurface occasionally but always came back on when restarting the vehicle. But know it seems that restarting the vehicle is not fixing the problem and the screen has been blank for the last 3 days.

See all problems of the 2017 GMC Yukon 🔎.

My vehicle has software that controls the rear gate, cameras, and my safety features for blind spots—seat buzzer to warn of collisions and voice activated phone system. I recently had a safety recall involving my back wheels locking up during driving. I had the recall done by power Chevrolet and it affected my cameras, which I noticed were longer accurate immediately after leaving the dealership. My seat buzzer kept buzzing warning me of a collision due to the cameras inaccuracy. I am unsure if it affected my blind spot warning but my car was unsafe to drive as the safety features fill in many blind spots in this big vehicle. Additionally I had been having issues with my back gate opening when it should not resulting in two stops to close it— one in costco and one on [xxx] outside of philomath, oregon. These are safety issues. To get the software issues resolved, it cost an additional $210 for the updates and my back gate is still not fixed and no solution is offered. My fear is that people will be unaware their cameras or safety features are no longer properly calibrated and hit something or even worse, be unable to pay for software updates to make these features functional resulting in more crashes. I was unaware of the software updates ( I did all updates GMC pushed) needed to be done and this just continues on with more software updates to be released requiring future payments. I bought this car new and this was not disclosed or even discussed. GMC can push down updates that make other updates necessary and be an unending source of revenue for them. Oregon just passed a right to repair law but cars are exempt. This will result in unsafe vehicles on the road. My oil change cost me $350 with $210 the software updates. What were these safety related updates not done as recalls? information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Aside from constant electrical issues with the serial gateway module that gm refuses to replace many safety features fail regularly most importantly this replacement Yukon for the 2023 with engine issues also has engine issues and the same 6. 2l engine. When leaving my home and or driving on any decent up or downhill road and coasting the vehicle will misfire and trigger the mil to flash. I’ve taken it into the dealer many times for this and in the end they say it’s a software problem with afm disabling 5 cylinders. They claim that the geometry of the vehicle along with having 5 cylinders disabled causes the engine to vibrate enough to make it think it’s misfiring. This came from their factory field service tech. They refuse to fix it. They refuse to put this on paper. They told me if I wanted it fixed, I could buy a 2025 instead. This is insanity.

The component that failed was the camshaft and lifters in the engine - my safety and others was put at risk because while going 45mph, I suddenly lost forward moving power and couldn't go faster than 35 - braking power was sketchy and only responsive when pumped. - I received the following errors on my dash "service esc" "service traction control", reduced acceleration drive with care", "forward collision system unavailable", "service emission system" the vehicle would shudder violently- this problem has been confirmed and corrected at a huge expense (see bill) -.

Upon cold start vehicle rattles when idling down and growling noise when accelerating upon left or right turns. Also, has constant vibrations with sound of metal rattling at speeds above 30 mph. Forward collision light on without a significant amount of mileage on vehicle. I have taken my vehicle to dealership at least 5 times referencing the vibrations. Growling noise was heard by service advisor last visit October 2024, and he stated it probably were the tires. I advised him that brand new tires were put on vehicle, April 18th 2024, rear vibration has never stopped from time of purchase. I have asked dealership to check drivetrain as it is a know issue for 21 Yukon denali. Vehicle has not received recall but was manufactured at arlington plant where the parts of the drive shaft was not properly heated and differential is known for issue upon cold start. Vehicle powertrain warranty is due to expire August 2025 or 60,045 mileage. Therefore with that, the vehicle was placed in service August 2020 months before unproperly heated driveshaft recall was determined. My vehicle should be on the list for this recall as GMC noted this to have occurred on vehicle prior to 07/2021. In addition, a chirping noise comes from front of vehicle while idling and when automatic stop starts back up. There are already known recalls for two of issues noted above.

The contact owns a 2023 GMC Yukon. The contact stated while the vehicle was parked, the vehicle shuddered. The "service traction control" and the "forward collision system unavailable" message was displayed on the instrument panel. The check engine warning light was illuminated. The failure occurred on several different occasions. The vehicle was taken to a dealer where it was diagnosed that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The vehicle was taken back to the dealer where it was diagnosed once again that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The vehicle was taken back to the dealer for the last time where it was diagnosed once again that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The manufacturer was notified of the failure. The failure mileage was unknown.  .

On January 21, 2024, my family and I went to lunch. As we proceeded to leave to return home when I pressed the brake the braking system, traction system, and forward collision systems all failed simultaneously, causing me to be unable to stop the vehicle which caused it to go through a stop sign while the brakes were fully depressed. Luckily, we were still in a parking lot, traveling only 5 mph. There was no oncoming traffic as we rolled through the stop sign. The following error messages displayed on the dash info screen brake system failure 43 mph top speed, forward collision system unavailable, service traction control, service brake pad monitor there was no warning from the display prior to trying to stop the vehicle that indicated there were any issues with the brakes. It wasn’t until I depressed the brake that I realized that the braking system was in total failure. After safely allowing the truck to roll to a stop, I turned the engine off, and then back on to see if that would reengage the brakes, but it did not resolve the issue. At that point I called an uber to take my family home and a tow truck to transport my vehicle to my local dealer, barker motor company. My fear is that this could have happened while we were on the highway traveling faster than 5mph in traffic, which could have been potentially fatal. After having my vehicle for a week to identify and repair the brake issue, was unable to identify the specific cause of the brake failure to repair and could not insure me that the brakes would not fail again. Instead, the technician replaced the battery in response to a low voltage code that showed in the dtc report. However, he could not provide an answer as to how that could have been connected to the total brake failure.

While driving my check engine light came on indicating that service was needed on the electronic stability control (esc), traction control, anti-lock brake system (abs), brake assist the vehicle top speed reduced to 43mph. My braking system was compromised and I have to travel at reduced speeds on busy roadways to arrive at my destinations. I have taken the vehicle to a certified GMC technician for diagnostics and repair.

I was involved in a vehicle accident on 10/6/2021 where my vehicle was stuck by an uninsured motorist driving recklessly on the interstate causing a total of 4 car collision. My vehicle was a a 2021 GMC Yukon slt SUV, in which I was struck on rear drivers side quarter panel and again by another vehicle in the front bumper by another vehicle that struck in the rear bumper by the reckless driver. With my vehicle being struck by two vehicles I was shocked to learn the onstar safety security features did not detect or contact me regarding the accident. It wasn’t until the wrecker driver arrived to pull my vehicle onto the tow truck that I received a diagnosis notification email from o star about my antilock braking system. Although I was wearing my seat belt, the impact of the collision was very shocking, my chest and neck struck the steering wheel, my glasses were knocked completely off my face on to the passenger side floor board, my personal belongings in the passenger seat, were thrown and scattered over the passenger floor area. Once the emergency authorities were on the scene everything was about over I contacted onstar via phone, and asked why wasn’t I contacted or my accident detected, and the call taker/on star representative advised me because my airbags wasn’t deployed, they did not receive a notification or alert regarding my emergency. I have attempted to make contact with onstar several times since the accident and as of today I have yet to get an answer of why my air bags did deploy and why the emergency sensors did detect the impact notify emergency services as this is a feature that I was charged for monthly and added protection that I counted on to assist me but very much failed me at my time of need.

While driving on highway institute steering power and could barely control the steering wheel while power assist warning, stabilize,airbag light and passenger windows wouldn't go up.

See all problems of the 2015 GMC Yukon 🔎.