What 295 owners told NHTSA about the 2021 GMC Yukon Denali Xl 1500

While driving at 60 mpg on a major highway vehicle began decelerating itself and eventually stalled. Driver was able to pull to the side of the road in a turning lane. Private mechanic found code that fuel pump control module failed. After the failure vehicle could not be put into neutral and had to be towed back to residence by a tow truck. Check engine warning light did not appear until vehicle stalled.

NHTSA ODI 11611096

The contact owns a 2021 GMC Yukon. The contact stated that while driving approximately 55 MPH, the vehicle decelerated independently and stalled. The vehicle failed to restart and was later towed to the local dealer who diagnosed that the fuel pump power control module was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was provided. The contact was informed that the VIN was not included in NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 50,500.

NHTSA ODI 11610195

1. Fuel pump control mod 2. my car gave me only a second warning before it shut down entirely. I was somehow able to get to the side of the road. no car going to the car 3. It was replaced at an independent service station. They called GMC dealership for assistance on diagnosis. Dealership said this is happening 4. No warning lights at all. No car trouble at all. Car is fully up to date on maintenance This is only a 2021 car with such low mileage you expect to a car to run properly if well maintained. I called the GMC dealership and spoke to the Service manager and he just said that these things happen. Cars are complicated these days. I found that unacceptable since I could have been killed if someone was directly behind me and I could not get to safety. I spent $416 to get towed from a NJ towing company since AAA is not allowed to tow me on the Garden State parkway. . I spent $165 to get to Philadelphia to catch my flight since I did not have a car. I hope that this major shutdown of this car can be addressed and the answer is not just that cars are complicated these days. Thank you.

NHTSA ODI 11607517

The contact owns a 2021 GMC Yukon. The contact stated while driving at various speeds, the message “Safety Restraint Unavailable” was displayed. The vehicle was taken to a dealer where it was diagnosed that the battery voltage was low. The battery was replaced; however, the failure reoccurred. The vehicle was taken to the dealer on two other occasions, where the system was reset, but the failure reoccurred approximately two months later. The manufacturer was notified of the failure. The failure mileage was approximately 16,000.

NHTSA ODI 11607218

The contact owns a 2021 GMC Yukon. The contact stated that the vehicle was difficult to start. The contact stated that while his wife was driving 50 MPH the following day, the message "Press Start Again" was displayed. The contact stated that the vehicle then stalled while the driver was pulling to the side of the roadway. The contact's wife was able to pull to the side of the roadway and restarted the vehicle. The check engine warning light was illuminated. The contact's wife was able to drive back to the residence. The contact stated that while scanning the vehicle with a vehicle scanner, the diagnostic trouble code: P129F was retrieved. The dealer was contacted and was provided the diagnostic trouble code: P129F. The dealer confirmed that the failure was related to NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline); however, the VIN was not included. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 33,929.

NHTSA ODI 11606964

“Service steering column” notice appears on dash board. Steering wheel is locked and car won’t start leaving us stranded. Dealer could not diagnose problem. Car started at dealership. Took it home. One month later happened again.

NHTSA ODI 11600880

The contact owns a 2021 GMC Yukon. The contact stated while driving approximately 60 MPH and depressing the accelerator pedal, the vehicle started shaking and shuddering. There was an ESC service warning light illuminated. The vehicle was taken to a local dealer where it was diagnosed that the right lifter and the camshaft were damaged and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 72,000.

NHTSA ODI 11600265

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.

NHTSA ODI 11599180

There are apparently a couple of faults affecting the SRS and leading to a periodic airbag light and "Service SRS" warning. GM has issued/revised a few Service Bulletins related to this warning. Some are related to software, some are related to overhead wiring, some are related to the clock spring in the steering wheel, and some are related to the driver's side airbag module. My understanding is that when the SRS warning appears, all airbags are disabled and GM says we drive our vehicles at our own risk. To my knowledge this has affected several models of approximately 2021-2023 GMC (Yukon and Sierra) and Chevrolet (Tahoe, Suburban, Silverado) SUVs and trucks.

NHTSA ODI 11596378

While driving the car, the glass sunroof spontaneously exploded. It was NOT associated with a rock strike, no other cars were nearby, and the vehicle was not under an overpass. The noise was extremely loud, similar to a gunshot. The sun shade was closed, otherwise broken glass would have showered down on the passengers.

NHTSA ODI 11592146

Twice in a five day span vehicle stalled out, acting like it is not getting fuel. Each time it took several minutes of trying to restart and getting below fuel tank to give it a couple knocks to get it to start. Both times there was atleast a half tank of gas. Each time the car was running well when it suddenly slowed down on its own, the first time I was on a busy street resulting in the need for a tow and I had my grand baby with me. The second time it was an isolated road and surprisingly I had cell service to call for assistance. The tow truck driver told me he thought it was the fuel pump. I looked up my vin but it isn’t listed as one of the affected vehicles in the GMC Yukon recall, however it certainly seems like it is. I had no warning of any type with each incident, the car simply acted as if it ran out of gas. I have an appointment with a local garage. Additionally when this happens the vehicle does not let me shut it off. The engine isn’t running but I can’t power down the electronics system.

NHTSA ODI 11590797

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed and completing a turn, the forward warning collision system alarm sounded, but the vehicle failed to activate automatic emergency braking. As a result, the vehicle collided with another vehicle ahead. The air bags did not deploy. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the ABS. The vehicle was not repaired. A police report was not filed, and no injuries were reported. The manufacturer was not notified of the failure. The failure mileage was unknown.

NHTSA ODI 11586839

I owns a 2021 GMC Yukon. My wife was driving approximately 70 mph when the vehicle suddenly stalled. The vehicle would not restart. The vehicle was not able to go into neutral. The vehicle was towed to the dealership who diagnosed that the fuel pump module failed and needed to be replaced. The vehicle is getting repaired but not covered under warranty or by recall. The manufacturer was made aware of the failure. The approximate failure mileage was 14000

NHTSA ODI 11582799

Total engine failure due to bearing issues in the bottom half of the engine.

NHTSA ODI 11580224

Car started making strange noises in the rear portion and was not driving as it normally would. Proceeded to take the vehicle to a GMC service dept. and was told the rear differential is close to failure and is "shot" and needs to be replaced. The service representative advised us to not drive the vehicle because it is unsafe to operate. Upon investigating it appears there was a recall for 2021 Yukon's for this same issue however this VIN number was not included in the recall but it appears this is the same issue. My vehicle remains at the service center waiting for the "differential assembly" to be replaced but it is currently on backorder and we were given no time frame of when this will be resolved or when the parts will be available.

NHTSA ODI 11572679

FUEL PUMP POWER CONTROL MODULE SKU NUMBER 13537053 brand new GMC denali less than 9000 miles had serviced for 5 previous recalls drove for a week. Truck completely shut down on road no power will cause serious or death if person is on highway as engine turns off and car shuts down due to electric shift cant put car in neutral not even with key from key fob so if get vehicle towed cant even shift into neutral big fail on gm part and will cause major issues as vehicle just shuts off do to this issue no service light. Major accident waiting to habit and back ordered parts on a expensive machine

NHTSA ODI 11569524

The lighting on the entire interior infotainment area will randomly go bright and dim all by itself. I was almost in an accident on the interstate due to this. It was blinding and distracting to have the lighting dim and then go bright. It has been randomly doing this for about a month. I called GMC and they said they had no record of this happening on other vehicles, however when I searched for the issue with my vehicle, I realized other GMC owners have experienced the same issue. I was able to get a video of it happening one morning while waiting in my driveway to drop my kids off at the bus stop. I was in the parked position. There are no warning or messages when the lighting malfunctions, so I am not at all prepared when the car turns the lighting to MAX brightness. It poses a risk when driving by blinding the driver, causing the driver to loose focus while driving trying to adjust the lighting back to dim. It is an unnecessary distraction. The dealership couldn't confirm any malfunctions in my car. As previously stated, I have a video of the malfunction, but I am not able to upload it. I am willing to send via email.

NHTSA ODI 11569064

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

NHTSA ODI 11567953

My family and I purchased this vehicle brand new in August 2021. We live in Phoenix Arizona and bought it from Earnhardt Buick & GMA in Mesa, AZ. While driving the vehicle in the last few weeks I personally could smell a strong odor of fumes in the cabin when the A/C or Heater were on. After a few days of noticing it my nose got numb to the odor as I dismissed it and kept driving the vehicle. After about a week, I had my two kids in the vehicle, they both noticed and made comments on how strong the odor of fumes were. We decided to not utilize the A/C or the Heater and contacted the dealer for investigation and repairs. This is a very serious health hazard as I and my family were exposed to exhaust fumes entering the cabin. For a few days and nights I suffered headaches and some dizziness as I was driving mostly the vehicle. We did take it to Earnhardt Buick & GMA in Mesa, AZ for investigation and repair. The maintenance supervisor confirmed that indeed somehow the exhaust had some crack that allowed fumes to enter the ventilation system. The Vehicle is now under repair at the dealership. I was notified by the maintenance advisor that this defect would not be cover under warranty as the vehicle is out of manufacture warranty. I Also had purchased an extended warranty (Platinum) which they had stated "bumper to bumper", but this also does not cover the manufactures defect. There were no warning lights associated with this problem. I would strongly recommend that inspections be made, especially if some drivers have problem with smell and odors. This is a big health hazard. Thank you for your attention. [XXX] . [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11567126

The contact owns a 2021 GMC Yukon. The contact stated while driving 25 MPH, upon accelerating from a light, the vehicle began to shake and decelerated and failed to accelerate and exceed 25 MPH. The vehicle accelerated, jerked, and stalled. The check engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the fuel pump control module needed to be replaced. The mechanic informed the contact that the parts were on backorder. The vehicle was not repaired. The contact stated that the failure was related to NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline). The manufacturer was notified of the failure and opened a case. The failure mileage was approximately 67,150.

NHTSA ODI 11564320

On Monday, November 20, 2023, I was operating my vehicle on Interstate 80 in western Nebraska when suddenly and without any notice, apparently an engine lifter in cylinder 8 failed causing the vehicle to lose power while in heavy semi-truck traffic, while operating at approximately 80 mph, forcing me to avoid a collision. Since the incident, I have become aware that this is a known problem with GMC, and that they have extended their power train warranty under certain circumstances because so many engine lifters are failing, many without notice or warning. My vehicle is serviced every 6,000 miles at a GM dealer and also operates the OnStar system. Neither the dealer nor OnStar detected the failure or warned me of any issues that cause a stall while in traffic. Fortunately, I am an experienced driver and was able to safely pull the vehicle off the highway.

NHTSA ODI 11557027

While traveling on the interstate at 70 mph with husband and child inside, the vehicle started shaking and stalled. Had to glide off onto an exit ramp where the vehicle stopped and would not restart. Onstar ran diagnostics and came back with code P129F.

NHTSA ODI 11556380

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.

NHTSA ODI 11553511

While driving at a low speed the vehicle suddenly hesitated, loss power and shut off. After several unsuccessful attempts to restart I had to have the vehicle towed to a local GM dealership. Their assessment was that the Fuel Pump Control Module was the cause but but my VIN was not associated with recall NHTSA Campaign Number: 21V739000 and they will not cover the replacement of the module that is now nearly impossible to get a replacement part for.

NHTSA ODI 11550593

Car suddenly turned off while driving. Thankfully I was only going approx 10 miles an hour. Screen asked to restart engine but it would not start. Got stuck literally in the middle of road. Was not able to put into neutral to remove from roadway. The assessment from GMC dealer was a failed fuel pump control module. 900 miles outside of warranty. This could have been a much more serious and dangerous situation if I had been traveling on a busy highway at a much higher speed. This should be investigated further as my car is just now 2 years old and well maintained.

NHTSA ODI 11547958