general problems of the 2021 GMC Yukon

The contact owns a 2021 GMC Yukon. The contact stated while driving at an undisclosed speed, the engine seized. The brake pad sensor warning light illuminated. In addition, the contact stated that the vehicle continued to roll forward. The contact was able to drive the vehicle to the shoulder of the road. The contact stated while attempting to restart the vehicle, the vehicle failed to start. The contact stated that a nearby driver assisted by providing a jumpstart. The vehicle was driven to the residence. The vehicle was then taken to an independent mechanic where it was diagnosed with alternator failure. The contact stated that the vehicle was previously taken to two independent mechanics, and the vehicle was diagnosed with alternator failure. The dealer was made aware of the failure. The contact was informed that the failure was a known failure with similar vehicles. The manufacturer was made aware of the failure with the alternator and the brake pad sensor. The contact was informed that the repairs were not covered under warranty or recall. The failure mileage was approximately 95,000.

Car shakes in drive, car shakes when accelerating, transmission issues, rear differential had to be replaced.

I am the owner of a 2021 GMC Yukon denali with the 6. 2l v8 engine (VIN: [xxx] ). This vehicle has exhibited multiple serious issues affecting safety, drivability, and reliability. 1. Engine noise & oil consumption: since purchase, the vehicle has had a persistent loud knocking/tapping sound, especially under acceleration. The engine also consumes an excessive amount of oil between scheduled oil changes, with no visible leaks. I reported this to the dealership multiple times, but since there is no active recall or TSB, they refused to diagnose or repair the issue under warranty. I have since learned that many other 2021 Yukon denali owners with the same 6. 2l engine are experiencing similar issues and some have had repairs or engine replacements covered by gm. I have received no such support. 2. Braking problems: the vehicle has ongoing brake performance issues. Despite replacing the brake components multiple times, the brakes feel inconsistent and unsafe, especially during highway driving or sudden stops. There is vibration and uneven response, and the braking system does not inspire confidence. These problems have persisted despite attempts to correct them. 3. Suspension/handling concerns: the suspension feels unstable and loose, especially at highway speeds or when turning. The ride quality is poor, and there is noticeable sway and body roll, which creates discomfort and concern for vehicle control. 4. Fuel/propulsion system: the engine does not always respond smoothly to throttle input. I’ve noticed occasional hesitation or surging, which may be related to the previously mentioned oil consumption or fuel delivery. Again, the dealership has been unable or unwilling to resolve these issues without charging diagnostic fees. I’ve reported these issues to my local GMC dealer on multiple occasions, but no lasting solution has been provided, and I have not been able to afford expensive diagnostic costs out of pocket—especially for a vehicle of this price information redacted pursuant to the freedom of informatio.

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) -.

On [xxx] I brought my vehicle to rivard Buick GMC with a squeaking noise that was check and attempted to be repair four times at the same location. They provided a quote for $2,309. 10 stating it was the master cylinder. Rick the services director said it was not cover under warranty and it need it to be cover by me, at that point I explain to him the vehicle has been in and out of his services department for the same issue since it had 20,000 miles. 1st time-they replaced the front brake pad stating gm had a defect on them (noise went away for a few thousand miles) 2nd time- they apply conditioner to the brake and lubricant so they say (noise went away for a few thousand miles) 3rd time- they said it was not the front brakes anymore making the noise. They said warranty did not cover rear brakes due to gm not flagging it as defected pad. I complained the noise was coming from the front of the vehicle but they insisted it was the rear so I paid $500 plus to get the rear brakes at 60% life left on them. At the time of picking up the vehicle after repair completed the noise came back within a few miles from the dealer. I returned to the dealer and spoke with the services manager troy, he apologized for the inconvenience and said they will take care the front brake at no cost to me, however they submitted a claim to gm to get the work done and kept my money when they misdiagnosed the issue. 4th time- noise comes back at this point the warranty it's expired and they tell me it's the master cylinder the actual issue. When I talked to rick, he said that gm was willing to pay for half of the work and the other half it's my responsibility. On [xxx], my wife and three kids almost hit a wall while trying to stop and the braked did not work. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

20221 GMC Yukon denali suddenly comes to a stop ,” it brakes hard “ it acts like when you are almost gonna hit someone and brakes engage so hard. Jerks everyone to the front !no other lights coming on or anything else! for now it’s been doing it at slow speed , really don’t wanna experience it at a high speed , pls help these vehicles are so expensive to be dealing with this . This is my wife and kids vehicle.

Breaking system engages at high-speed for no reason. Very scary incident breaking system engages at slow speed also for no reason.

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.

This GMC Yukon underwent an over the air update in remote wyoming and was almost undriveable due to steering problems and brake malfunction. Also engine and transmission problems. It has been awaiting repair, but I have been informed that no fix is available because of transmission defect. No parts available we were nearly stranded.

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.

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.

I own a 2021 GMC Yukon denali that had total brake faliure last Tuesday. I had it towed to a local GMC dealer and are repairing it under warranty. I was lucky to be on a back road when my brakes went out. I had no warning lights come on prior to hitting the brake pedal and was able to coast to a stop on the shoulder when I applied the brakes, the pedal went to the floor and did nothing. You can't stop the car with the parking brake because it is electric. My concern is what if I was on a busy road when this happened or what if this happens to a family in traffic they could be seriously hurt or worse yet killed. I do have good photos of my instrument panel with all of the warning lights coming on after I tried to stop. In good conscience feel that I have to at least try and report this to gm, the state and anyone else that will listen. If nothing comes of this at least I tried and just hope no one gets hurt if this happens again. My wife refuses to ride in that vehicle until I have solid answers. The dealer said they will have my car repaired this week and are replacing the master cylinder and ecs this is fine but why did it happen and how can I be sure it won't happen again? I believe in gm and have a 2023 Yukon denali on order. I would hope that after 3 years of this model they have most of the little quirks worked out. A rep from gm did contact me and at first was talking about buying my car back but changed that today. My case number is 9-8497380349 . The problem is I have no idea when my new car is coming in our should I just cancel it and find something else. In my opinion this is a very serious problem.

On Wednesday, January 12, 2022, while driving from columbia, SC to cincinnati, we were heading northwest through the mountains of north carolina, on I-40, just east of the TN border. Traffic was fairly steady and heavy, so we were traveling at approximately 45 mph, in the right lane, winding through the mountains. Our friend, ** ***** was driving, my wife, ********* *****, was sitting in the right front passenger seat, working on her laptop, and I was sitting immediately behind her, also working on my laptop. With a semi-trailer truck slowing ahead of us, *** signaled to make a lane change into the left lane (this is only a two lane highway). As we were transitioning to the left lane, the vehicle suddenly – without any warning or driver inputs – slammed on its brakes, bringing the truck to a sudden and violent stop. Given the violent halting of the truck, we all assumed we had been rear-ended by a truck. The braking was so serious, luggage from the rear of the vehicle shot forward like a missile, striking my wife in the back of the head. She suffered what we believe to be a concussion, and she did seek medical attention in the days following the incident. Sitting behind her, the sudden stopping action caused me to twist my left knee, resulting in what might be a cartilage tear. I also saw my physician in the days following, and he acknowledged the swelling of the left knee. He advised me to monitor the knee carefully, and if the pain persists, to get an mri. The pain has not gone away, and I plan to get an mri in the next week or so. Our friend suffered a severely strained back in the incident, and has been treating his back with both ice and heat therapy. This was the third time this happened, each nearly resulting in a tragic accident. The dealer said "it's just a software glitch. " the "brake assist" program is clearly defective and unsafe.

On Friday October 22, 2021 around 7:20am as I was driving my children to school I was driving around 40 mph when suddenly I received an alert on the dashboard saying “brake system fail”, I then proceeded to brake to make sure my breaks were working when I noticed they did not work. I then started pumping the gas pedal repeatedly to make the vehicle stop. My car was not stopping and my children and I panicked and started crying. As I was getting closer to a vehicle and ready to crash I swerved the vehicle to the right where it was just an empty lot. I continue to press and pump the brakes until the vehicle came to a complete stop. I took pictures of the dash board once the vehicle was completely off. My vehicle was towed to my house shortly after. I refuse to drive that vehicle after the terrible experience that jeopardize the life of my children and myself. We have suffered emotional distress.

This new 2021 GMC Yukon denali we purchased on June 2, 2021 has a very sophisticated controls system that includes a feature, entitled "brake assist," that is designed to detect "rapid brake pedal applications due to emergency braking situations and provides additional braking to activate the antilock brake system (abs) if the brake pedal is not pushed hard enough to activate abs normally. " "brake assist disengages when the brake pedal is released. " after I left the dealership (June 2nd), I noticed that the "service brake assist" light had illuminated on the driver information center (dic). I pulled off the road to check the owner's manual, and then continued home trusting that no immediate hazard existed. I subsequently set up an appointment with the dealership for a checkup. A week later, the dealership downloaded a new software package from GMC. The brake assist light did not appear when the engine started, so I left for home (50-minute drive at moderate speeds). Enroute to my home, I stopped at a store and turned the engine off. Started home a few minutes later. While accelerating past 45 mph, the brake system independently engaged, which threw me against the steering wheel and into the windshield. As the SUV decelerated through 20 mph, the brakes automatically released. I was not hurt, nor did I lose angular control of the vehicle. I completed my drive home and parked the Yukon normally. Did not drive it again until returning to the dealership a few days later. This second visit did not bear fruit. After significant explorative work, the lead mechanic drove the vehicle several miles under a multitude of conditions, but could not duplicate the problem or get the light on the dic to extinguish. At my request, the dealership returned possession to me with the light still illuminated. I have driven the vehicle several miles since then with the "service brake assist" light still illuminated. I suspect this is a GMC software problem.

Travelling down the highway 69 mph with my wife and three small children when the dash flashed multiple error codes, engine speed limited to 62 mph, and brakes essentially went out. Was able to get safely stopped. Contacted dealership and they advised shutting it off for 20 min and it would "reset". It did not reset and we refused to drive it in such unsafe circumstances without adequate brake function etc. GMC roadside assistance came and towed it away. Could have resulted in much worse outcomes and we are thankful no one was injured. Very nervous to drive it again after we get it back, not knowing if it will malfunction again.

Gm changed the travel of the steering column so now it's only a few inches from the dashboard. In prior models, the steering wheel (sw) travel was much more. Due to gm's desire to save money and complete disregard for driver, passenger and other vehicles safety, the driver has to reach out to the sw resulting at dangerous elbow angles. In performance cars, the sw is designed to be close to the driver because physics principles of torque reveal: the greater the angle of reach, the more torque it requires to turn the sw. So reaching out with the elbow at zero to 10 degrees requires a much longer reach, thus greater force/torque and longer reaction time, than having the sw at a 30-40 degree 'elbow bend'. The point is, for a driver to turn the sw on this vehicle, it takes too much strength and too long a reaction time to safely operate it. I do not feel safe driving this model like I did with prior model years. With this 'land yacht' having an even longer wheelbase than before, the distance to the sw is even more critical in regards to reaction time and safe driving! plus, since the sw is so close to the dashboard, when I raise my leg to step on the brake pedal (which now I have to do because gm also took away the foot pedal adjuster!), my leg hits the bottom of the sw! the time it now takes to bring a foot up over the brake pedal, to look down to see if your leg is going to hit the sw and cause the sw to either stop moving or re-direct the vehicle into an unplanned direction, all while trying to stop this over 7,700 lb vehicle with mushier brakes than any model ever, is dangerously long. The overall reaction time to generally stop this model is at least 5 times that of my 2018 Yukon xl denali. The travel length of the sw needs to be increased 2-3 inches to safely operate this truck. Gm must be held accountable for increasing dangerous situations with their vehicles!.