What 312 owners told NHTSA about the 2024 GMC Sierra 1500

The vehicle suffers from a persistent transmission defect including shuttering bucking slipping torque converter failure valve body failure twice metal debris improper down shifting chirping noises and related liability and safety issues. The vehicle has undergone multiple unsuccessful repair attempts at authorise GM dealerships. These repairs include torque converter replacement valve body replacement twice solenoid replacement fluid services software updates. The transmission problems have persisted despite these efforts and the vehicle has been out of service for more than 22 business days including a breakdown driving to Florida. I have filed a claim through GM but it seems like it just keeps getting pushed further and further away this is a serious safety issue as I fear for those driving around me and myself that I may cause an accident with the bucking slipping and failure to operate properly on the road.

NHTSA ODI 11748050

Issue is with the transmission as it harshly shifts into a low gear when on an incline. This causes me to lock up my breaks as it feels like the truck was rear ended by another vehicle. I’m concerned that this is going to cause an accident. This problem has not been reproduced by the dealer. I’ve taken it to the dealership several times. No warning lamps or messages.

NHTSA ODI 11744152

My truck engine has failed due to metal shavings in the oil related to the L87 engine recall, and the failure occurred after GM had replaced the truck’s oil as part of the recall remedy. The recall remedy did not prevent the failure of the engine.

NHTSA ODI 11743965

My truck engine has failed due to metal shavings in the oil related to the L87 engine recall, and the failure occurred after GM had replaced the truck’s oil as part of the recall remedy. The recall remedy did not prevent the failure of the engine.

NHTSA ODI 11743967

I was driving down the highway when all of a sudden felt a hesitation and then seen message low oil pressure turn off vehicle and was just able to pull of the exit ramp of the highway when the truck had complete loss of power and then Died..called dealer right away and was flat bedded to the dealer..This just happened yesterday (06/08/26)

NHTSA ODI 11742868

The vehicle received the official N252494001 recall oil remedy on 06/27/2025 at 15,438 miles (but suffered catastrophic engine failure and loss of propulsion at 33,661 miles on 05/30/2026).

NHTSA ODI 11741282

Check engine light illuminated with service transmission. The next day transmission started slipping and finally would not engage in reverse. Dealership Has it now and after diagnosis they advised that they had replaced the electronic control module to which, on the test drive, the gauge cluster blacked out and they got more codes. The cpdes that the vehical threw were the transmission valve body needed to be replaced.The truck has 24k miles on it.

NHTSA ODI 11739083

The contact owns a . The contact stated that upon restarted the vehcile experienced harsh restarts and lurch forward. The contact indicated that the failure and become more frequent. The vehicle was taken to the local dealer was unable to duplicate the failure and no service was performed. The manufacturer was notified of the failure.. The failure mileage was 33,400.

NHTSA ODI 11735449

Burnt engine oil, breakdown of viscosity, low oil warning light prior to required change, and oil consumption. Multiple events and oil changes with same results of oil fluid conditions and consumptions with low-mileage engine and overall vehicle.

NHTSA ODI 11735643

Engine seized

NHTSA ODI 11732188

When I begin to accelerate on the highway, and the truck downshifts, it locks up the rear brakes.

NHTSA ODI 11730614

While driving west on Hwy 20, near Augusta, GA my vehicle motor blew without any warning. I had to guide my dead but rolling truck and trailer to the side of the Hwy against a high retaining wall. The truck shut down and set the brakes after stopping and would not restart, shift into neutral, or move without special two equipment. **when I received the first recall notice I call my GMC dealer and they said their was nothing they could do yet. Later I received a second notice and responded to GMC dealer where the changed the oil and cap. A few weeks/months after that the motor blew. GM has refused to be any help and replacement motor has been on back order for 3 weeks and counting.

NHTSA ODI 11729098

While driving a "Service Transmission" message appears on the information center. The truck shifts slowly, sometimes slamming into gear, doesn't seem to have smooth acceleration through the gears until a high gear is reached. Unusual sounds occur during the shifting sequence. The vehicle was dropped off at the dealer for service. Dealer claims that since they were not able to duplicate the conditions reported to them, the vehicle was fine and not in need of any further investigation or service. Transmission problems are a known concern with vehicle as recalls have been expanded to include this class of truck in the recall but GM is not including this vehicle.

NHTSA ODI 11727368

My 2024 GMC Sierra 1500's engine has gone bad, and needs to be replace after only 71,000 miles, and this is only 90 day after already replacing the transmission

NHTSA ODI 11725355

My engine makes a rattling noise intermittently, misses, and surges. The transmission has shuddered and shifts hard randomly. The transmission has stayed at 2-plus rpm for well over two minutes. All this happens at random times. I have shown videos to my dealership, which did no good because they couldn't replicate it. I have had GM's so-called fix with changing the oil and software updates, which still haven't fixed any of my issues. I've been in contact with the main GM over these issues, and no one has seemed to care. They did scan the vehicle, and the only code it showed was a loss of signal to the transmission control module, which I assume fixed itself, because they did nothing further.

NHTSA ODI 11723492

[XXX] and [XXX] of 2025 the 6.2 V8 engine died while driving down the highway in Houston. The truck was bought brand new in January of 2025 with 100 miles on the odometer. The first engine failure happened [XXX] with 10,350 miles. Replaced, the second failure happened [XXX] with just under 25,278k miles. Once again the engine was replaced and took almost 6 weeks. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11723247

I was driving on the highway with the cruise control engaged. An instruction came on the information center telling me to push the start button, while I was driving at highway speeds. Then the transmission downshifted numerous times violently the last few times. By the tachometer the engine was doing 6000 rpm. I pulled over and the start button would not shut down the engine until about the third time I pushed it. Then it would not restart. I had the vehicle towed to the dealership and they told me that they had gotten the truck to start but that the engine seized while pulling it into the repair bay. I had followed the recall directions that they had sent me for the recall on the 6.2 liter and they said that mine was fine and that I should use thicker oil from now on. I had done that but still had ths failure, which as a person that has worked on mechanical equipment my whole life, this failure is violent.

NHTSA ODI 11721911

The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle shuddered and hesitated, and the transmission was slipping. No warning lights were illuminated. The vehicle was taken to the dealer, where it was diagnosed, and DTC: P2818 “Pressure Control Solenoid H was stuck and the Transmission Control Module (TCM) valve body”. The contact was informed that the part needed to be replaced. The dealer informed the contact to stop driving the vehicle. The vehicle was repaired. The contact stated that months later, the failure reoccurred while driving at an undisclosed speed, and the vehicle shuddered and hesitated, and the transmission started slipping. The vehicle was taken back to the dealer, where it was diagnosed and determined that the torque converter needed to be replaced. The vehicle was repaired, but three months later, the failure reoccurred, and the RPM started fluctuating. The contact called the dealer; however, the vehicle was not inspected or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 3,000.

NHTSA ODI 11721983

Transmission started hash shifting and at highway speed it felt like the dark converter kept falling out of lock up. Stopped and took picture of service light

NHTSA ODI 11721107

The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving at 67 MPH, the transmission shifted to neutral(N) unexpectedly. In addition, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact attempted to drive the vehicle off the road. A passerby slowed down and allowed the contact to move over to the side of the road. The engine seized, and the vehicle stalled between the shoulder and the line of the left lane. The check engine warning light illuminated, and the messages "Battery Low" and "Reducing Features to Save Battery" were displayed on the instrument panel. The contact called a friend who towed the vehicle to the dealer. The dealer was informed that the engine had failed and needed to be replaced. The vehicle remained at the dealer unrepaired. The contact stated that due to the failure, the contact no longer felt safe while driving the vehicle. The manufacturer was notified of the failure. The failure mileage was 52,680.

NHTSA ODI 11717922

While traveling 60 mph on a divided highway went to pass another vehicle. Had no throttle response the engine had completely turned off, locked up seized up. I’m not sure what caused the engine to just lose all power. Had to go back to the lane and luckily there was a turnoff where I was able to turn off the highway.

NHTSA ODI 11713307

2024 gmc engine 6.2 that failed had the recall test done and a couple of mounts later engine started making loud knocking sound its at the shop now getting a new engine in been at the shop for about 3 weeks now

NHTSA ODI 11712299

Had a recall for the engine , went in for the pick scope test and it passed they switched the oil from 0w-20 to 0w-40 and not even 500 miles and the engine failed lucky I wasted driving it when it did

NHTSA ODI 11710835

Vehicle was in neutral on an alignment rack with no one in the vehicle. Vehicle was idling. Vehicle shifted into reverse on its own (no one in the vehicle) and backed off the alignment rack causing $7,000 estimated damage to the vehicle. This happened at a tire dealership (TGK, Owatonna, MN). Luckily no one got injured or killed. No inspection yet. No warning messages. This truck has had numerous "electrical glitches" previously that have had no resolution. This "glitches" have included loss of power while driving, 3 times smelling like burnt wiring upon start up, left mirror motor going bad, right mirror motor going bad.

NHTSA ODI 11710925

While traveling down the highway at approximately 60-65mph I pressed the accelerator to change lanes and pass a tractor trailer when it felt like my transmission slipped very abruptly. There was a very noticeable power loss and the truck would not accelerate. Then I noticed a loud knocking noise coming from the engine. No check engine light or any other indications on the dash to let me know there was a problem. I began to try and merge to the right of the highway to get off which was not easy do to the power loss and heavy traffic on the highway at the time. I made it to the right lane to exit the highway and when I slowed down the engine died and I had to coast to a stop luckily on an exit ramp. The truck was towed to a dealership and they state that I will need a new engine. I know this issue is already well documented with the GM 6.2l engines but I is very unsettling that the engine just died on the highway at highway speeds and no indications.

NHTSA ODI 11709974