Automatic Emergency Braking Problems of GMC Yukon - part 1

The brake system control module, engine control module, and vehicle stability control system have repeatedly failed across 24 months and 9 repair attempts at two authorized GMC dealerships in tennessee. As of March 17, 2026 the vehicle has 27 active diagnostic fault codes including u160f and u1610 (brake system control module lost communication on both can buses), u1611 (engine control module lost communication), and c2a0a (vehicle stability control disabling inhibited). All components are available for inspection at beaman GMC in antioch, tennessee where the vehicle currently remains in an undrivable condition. Safety risk: vehicle has stalled on the highway with my family including young children in the car. Brakes have randomly engaged over 100 times with nothing around and also failed to engage when needed. Stability control is disabled. These are active safety failures confirmed by GMC's own diagnostic scans. The problems have been confirmed by both darrell waltrip GMC and beaman GMC across 9 visits. GMC's own technical assistance center (case xxx) was involved and could not resolve the defects. The vehicle was returned with more active codes than at drop-off after 57 consecutive days in GMC custody. Two unresolved GMC safety recalls are open on this vehicle — l87 engine loss of propulsion (n252494003) and brake fluid leak detection failure — directly related to the reported defects. Warning codes have been present and documented since October 2023 beginning at 1,381 miles. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2023 GMC Yukon 🔎.

The forward collission system continues to perform phantom braking while driving in traffic resulting in near rear end collisions. The GMC dealer refuses to fix it without charging me for more diagnostic work, which has already been done twice. What is my recourse?.

See all problems of the 2021 GMC Yukon 🔎.

Phantom braking when moving forward after a stop. Dealer can’t replicate or diagnose it, therefore won’t repair it under warranty. It’s happened 6 times now and almost caused 3 accidents.

Automatic emergency braking system deployed unexpectedly on acceleration from a traffic light stop. Vehicle was about 10-15 mph and system operated with no brake pedal input. A vehicle behind had to do a panic stop to avoid collision. Deployment disengaged when accelerator pedal was released. My wife, principal driver, was in the car. She advised this had occurred two times before. No recalls are presently listed for the vehicle.

See all problems of the 2019 GMC Yukon 🔎.

While driving in approximately 10°f weather after the vehicle had been parked outside overnight during snowfall in chicago, the vehicle displayed a warning that said “do not drive — maximum speed 43 mph. ” at the same time, the brake pedal became extremely hard and the vehicle had significantly reduced braking ability, requiring much longer stopping distance. This occurred without any brake warning lights beforehand. After the vehicle warmed up and was restarted, the message eventually cleared but then there was a new transmission warning and the check engine light went on. After driving for a long commute, eventually all warnings disappeared. I personally know another 2023 Yukon owner who experienced the exact same message and braking loss under similarly cold conditions, which suggests this may be a broader safety issue affecting this model year. Because this involved a sudden safety-system activation combined with temporary brake loss, there was a real risk of being unable to stop the vehicle safely or avoid a collision. My vehicle is within the year range of gm’s brake-system software recall n242447990 (ebcm brake fluid loss detection issue), and it is unclear whether my case is related, but the symptoms point to a potential systemic braking or electronic brake control problem in the 2023 Yukon. This issue warrants investigation due to the combination • hard brake pedal • reduced braking performance • speed-limiting safety warning • no prior diagnostic warning • occurrence in very cold temperatures a sudden loss of braking ability is a serious safety defect.

Vehicle lost steering and brakes suddenly. Many errors on screen such brake system failure, abs failure, esc failure, traction control failure, maximum vehicle speed 43mph. Was able to slowly get home with no power assisted brakes. Did not drive it any more until it was taken to dealer 2 days later and the dealer could not replicate the errors. Dealer was able to see stored error codes; however, they could not verify any errors in any of the modules or computer. Dealer wants us to take it back and wife is scared to drive it due to no fixes or repairs. Loss of brakes and steering is not a situation to ask an owner to 'bring back when it happens again".

Vehicle: 2021 GMC denali mileage: ~48,000 miles purchase price: $62,000 issue: airbags & crash sensors failed to deploy complaint text: I am filing a safety complaint regarding my 2021 GMC denali. I was involved in a rear-end collision at approximately 45 mph, where I struck another vehicle straight on from behind. The impact was severe enough to total my vehicle, yet no airbags deployed, and no forward collision warning or crash sensor systems activated. This is especially concerning because this vehicle was previously involved in a front-end collision (not my fault) and underwent extensive repairs. I was assured all systems were repaired and functioning properly. Additionally, my vehicle had completed recall work related to safety systems prior to this crash. This is the second front-end crash involving this vehicle where airbags failed to deploy. Given the speed and severity of the impact, airbags should have deployed. The failure of these systems placed my life at serious risk. The vehicle has since been totaled and taken by insurance, but I am requesting that this failure be formally investigated as a potential safety defect in the airbag and sensor systems. I am extremely concerned that the vehicle’s safety systems were either defective or not properly restored following repairs and recalls.

My brakes stopped working randomly. Alarms started going off in the car. Thankfully I was able to quickly turn right instead of rolling into traffic. This was terrifying and could have caused a very serious wreck.

See all problems of the 2025 GMC Yukon 🔎.

The image module system has completely failed and never worked in the Yukon. Then it would brake while still accelerating.

This issue affects all vehicles in the GMC lineup. The forward collision alert system is so sensitive that it gives false positives constantly which causes 2 major safety issues with the vehicle. First is that it brakes without warning and when completely unnecessary. The 2nd is that vehicles like mine with a heads up display, have the entire display flash a very bright yellow blocking the field of vision to the front of the vehicle. The system is not able to be disengaged permanently and can cause rear end collisions by braking when no obstacle exists and blocks the ability to see in front of you via the heads up display warning.

Unknown.

See all problems of the 2022 GMC Yukon 🔎.

Keep quit working when I was driving , I just pick up from delearship for I another issue with on-star and is not part available is been there for over month not fix and now the brakes issue.

This is the 3rd Yukon I have owned all 2001-2003. Every one of them have had serious brake issues, abs illuminated, parking brake does not work, and light is illuminated, brake fluid everywhere, which when hot starts eating away at electrical components, or in my case at cooling system hoses. Which all lead too one issue after another. I really think that this shoudl be address becasue eveyone I speak with has the same issue. It's exhausting anf expensive too fix, but I have no choice becausei need 3 rows too fit all my children and cannot afford a brand new car.

See all problems of the 2001 GMC Yukon 🔎.

There's alot of time while I'm driving in line going slowly and break pedal become hard and it will seem like the truck it's not stopping.

See all problems of the 2016 GMC Yukon 🔎.

I constantly get the frontal crash not available warning the navigation picks up on conversations stereo freezes navigation screen has been blank no map data visible screen will not change from daylight to nightime anymore (I have taken the vehicle twice to the dealership and have it repaired then it happens again) when driving the vehicle will randomly brake and says something is near when there is nothing close.

See all problems of the 2024 GMC Yukon 🔎.

I have a 2017 Yukon. There is a recall on this model already for a vacuum pump that decreases the power brake assist. My vehicle is having this exact issue. The back tire sounds like the compressor is always running and when braking it grinds at the pedal like a vibration and doesn’t want to stop immediately. I need my vehicle added to the recall list so I can get it repaired.

See all problems of the 2017 GMC Yukon 🔎.

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).

My brakes are not working properly. I can be backing up and put my foot on the brake. My truck will keep moving until I apply a lot of pressure on the brake pedal. I can be backing up and my truck will automatically brake and stop moving. I have to cut the truck off, start it back up for it to move. I was in a stand still traffic jam and braking a lot and my truck did stop it keep rolling. Sometimes when I apply the brake it slides. . This is the third time I have put it in the shop. I changed the brakes, brake sensor and replaced tires. I am scared to drive it. My truck is currently in the shop now for the brakes. Please help.

When driving through eugene brakes suddenly got soft while at a stoplight, then pedal got stiff and very hard to keep pressed. An alert came on the dashboard 'brake assist service' just about the same time the brake pedal changed and car would not fully stay at a stop. When checking to feel what had just happened, by letting up and repressing the brakes, it would not fully stop car, even with all my strength pressing. If another car would have been coming through, my young son or myself could have been killed or seriously injured and I could cause someone seriously to be hurt or killed from being in their lane of travel. I alerted my husband that I was unable to drive the vehicle safely, he is in the vehicle industry and looked up online and found there is a common known problem, recalls, and service bulletins, but apparently not for vehicle years prior to 2017, although this severe failure is seen on 2014 and later; and the manual tests/diagnostics that a person can do in a pinch per the bulletin, recall notice, and articles; and in his trials of how to tell if it is a failure or fleeting problem - nothing alleviated it, all the symptoms are present and system is failing and continually bringing up the brake assist service alert. This is the info that we found on the recall, but didn't appear to cover 2016 year models: [NHTSA campaign number: 20v603. Gm's own number for this recall is n202300860. ] we plan to get this Yukon over to guaranty Chevrolet in junction city oregon tomorrow 10/8. The only thing that has been very recently noticeable preceding this in recent week or so is a slight uneven braking feeling in the motion of the car when coming to a stop. Which it has not done before.

Defective wire harness between 2 body control modules, causing alarm to go off repeatedly "service trailer brake system" and also "stabilitrack" will come on randomly and lock my brakes up and all of the features in my dash. This has been very scary to drive and has brought the vehicle close to collision more than a handful of times now.

See all problems of the 2015 GMC Yukon 🔎.

Font camera failure. Front camera controls many "safety features" which fail without the camera. Vehicle under mileage warranty amount but not under time warranty ( 3 years ). Camera only covered under bumper to bumper.

On 4-5 occasions since purchasing a new 2021 GMC Yukon denali the automatic breaking function has engaged for no reason, with no obstruction in the roadway. It has occurred at low speed (after disengaging break and starting to drive). Obviously, this is a major safety issue.

My vehicles electronic stability control is activating randomly. This issue started a few years ago and has increased in frequency. We will be driving at speeds between 50-75 mph in dry conditions and it will randomly activate which has almost caused us to lose control of the vehicle. No mechanics have been able to figure it out. I did some research and saw there was a vehicle recall issued for 2019 GMC Yukons electrontronic stablilty control system, but for some reason it does not cover my vehicle. The gm recall number is n192261050. The description of the issue matches exactly what is happening. I called GMC and issued a complaint and also have setup a dealership to fix the issue. I don't believe I should be responsible for paying the cost of the repair since other 2019 GMC Yukons were recalled for this issue.

Driving down the interstate at 70mph and it randomly slams on the brakes. At about 45mph it let's loose and speeds back up. There's never anything in front of the car and it does it a few times a week. Usually throws everything on the floor that was on the seats and scares the hell out of anyone inside the vehicle. Waiting for it to do it with a semi behind us that can't stop as fast!.

2 different times I have been driving once at a high speed of 70 on the highway and then driving 15-20 miles an hour today my automatic braking engaged and threw me forward which is a very scary feeling. I have not taken it in for service for that as it had only happened once a few months ago and there have been no warning lamps indicating an issue.

I was driving on the interstate on a low speed and my SUV came to a complete stop with no notice. Nothing was in the road or close in front of me. Jerked me to the front and seat belt left a red spot on my neck from the seat belt, scared the crap out of me. I thought I was hit from behind. The is a hug safety concern that needs to be recalled and fixed immediately before it causes an accident.

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.

The contact owns a 2021 GMC Yukon denali. The contact stated that on numerous occasions while accelerated at approximately 70 mph, the brake pedal engaged without warning then proceeded to acceleration. As a result, the vehicle inadvertently stopped and jerked forward. No warning lights were illuminated. The vehicle was taken to the dealer where the failure could not be duplicated. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 20,504.

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.

State farm is investigating the accident to see what, if anything, malfunctioned in my braking system. I ran a red light but when I pressed the brake upon approach of the red light my brakes didn't catch and so when I pressed them, I kept going at the same speed. I was going between 30 and 40 miles per hour I believe. Three cars were involved. I have a sore neck, chest, and burn marks in my neck region. I suspect my truck will be totalled. We performed routine maintenance on the vehicle. It had a little over 100k miles on it at the time of this wreck. There is not a recall on braking for 2014 models, but I see there is one for 2015.

See all problems of the 2014 GMC Yukon 🔎.

I had just left the house driving through my neighborhood at about 35 mph when for no reason the emergency braking engaged. The road was deserted, no other vehicles, pedestrians, dogs or objects in roadway. There was a momentary red dash alert, but I didn't have time to read it.

When I was merging on the fwy my car accelerated and I couldn’t slow it down. I had to get off the fwy and break really hard. Driving on the fwy and not being able to control the speed or breaks could of caused an accident or cost us our lives. I have an appointment with the dealer service center on sept 20, 2022. A few weeks ago I noticed the car was having trouble sifting gears.

" service trailer brake system" 5 times a week and sometimes more than that . . . . On average 5 times.

The SUV starts to brake on its own while driving. It came to a complete stop once and almost caused an accident.

Impact and accident at a 2 way stop sign, where my truck was stopped, and a Tesla dual motor model3, severed and hit my truck, due to the driver being on autonomous mode orfsd beta 10. Xzxx69.