GMC Sierra Complaints (2023)

567 consumer complaints on file.

#11672141July 9, 2025
POWER TRAIN
My 2023 GMC Sierra AT4 with the 6.2L L87 engine is showing signs of premature engine issues despite passing the recall inspection. I hear persistent lifter chatter, which is known to be a precursor to catastrophic failure in these engines. I no longer feel safe driving this vehicle due to the known defect with the crankshaft, rods, and valvetrain. GM issued a recall, but it appears to be incomplete and does not address the underlying issue in many vehicles, including mine. I am worried about sudden engine failure and safety while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11672378July 9, 2025
POWER TRAIN
While driving the vehicle, I entered onto the interstate, as I accelerated into the flow of traffic, (approximately 45-50 mph) my truck suddenly and unexpectedly jerked and “clunked” extremely hard, I thought I had ran over a large object, approximately 5 seconds later it jerked and “popped” loudly. At that time the reduced engine power and check engine light came on causing my vehicle to suddenly slow down to 20 mph and almost being rear ended by a tractor trailer truck traveling the speed limit that had to hit his brakes e trebly hard to avoid a rear end collision. After removing my truck from the flow of traffic, I turned it off, exited the vehicle to see if I had ran over something, I did not. Cranked it up, no signs on the dash, as I started back to the travel lanes, it “surged & jerked” the reduced power and check engine light came back on. Once I got the truck to the dealership, the service manager informed me he knew exactly what it was, the transmission valve body was no longer good. He also informed me that my truck was now number 28 in line just at that dealership for the same issue and repair, then added that GM is out of stock on the parts and back order status.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671950July 8, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2023 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671651July 7, 2025
ENGINE
The engine failed while pulling my camper over a mountain pass. This resulted in me being stranded along side the highway with the vehicle impeding traffic. The area the vehicle broke down had no cell phone service to call for help. This engine was a replacement engine and failed with only 20,000 miles. This vehicle is effected by the recent recall the GM issued on all 6.2L engines. The were not indications the engine was going to fail.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671678July 7, 2025
STRUCTURE:BODY, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Tailgate opened several times without being prompted. Once while driving, two times while in park.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671801July 7, 2025
ENGINE
After 1-year to date of the first time the engine seized up in 2024 and was replaced with another motor. Then around father's day weekend I went to accelerate on highway and it studder and service symbols for traction control and ESC service popped up. It shook and vibrated while running. The same dealership shop that replaced it last year stated that rods and such have failed. After not resetting the mileage on the dash board for the miles on the truck or extending the warranty on the AT4 2023 model I was skeptical as it ran rough to begin with. I was told that everything is as should be when talking to them in Jan/Feb 2025. Now we're here at the shop AGAIN. the Mechanic at the dealership the first time stated that he mentioned to the manufacturer that the issues he is seeing is tied to the motor and oil transferring and he is not surprised there are the issues but the manufacturer shrugged it off. So, after having the vehicle in my possession for 2 years, I'm having the motor replaced twice in one calendar year and without a vehicle combined and counting 2.5+ months. GMC knew about the issues and decided not to address them. I loved the truck but there were too many issues and it was my first GMC and will be my LAST. I WAS a big Chevy guy most of my life.. Now I'm considering a RAM..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671349July 5, 2025
ENGINE, POWER TRAIN, VEHICLE SPEED CONTROL
Driving on the highway under normal driving condition, my check engine light came on and said service transmission. This then put the truck into "limp mode" and I was stuck going 60mph in a 75mph zone. Dealership scanned and found that the coolant sensor control flow valve is faulty. This part is in such demand for these vehicles that it is unknown when the part will be in.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670988July 3, 2025
POWER TRAIN
Vehicle's 10 speed transmission on numerous occasions has locked the wheels at high rates of speed on the highway, causing the vehicle to veer across several lanes and almost crash. Vehicle will not always engage in drive selection causing a filed accident while trying to go from reverse to drive.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11670743July 2, 2025
STRUCTURE
The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving on the highway at 70 MPH, the front grill deflector detached and became airborne and struck the windshield, causing a crack. The grill deflector also struck the vehicle behind the contact; however, no damage was caused. No warning lights were illuminated. The vehicle was taken to a local dealer where it was diagnosed, and the contact was informed that the deflector was faulty and needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 25V060000 (STRUCTURE); as a possible cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 70,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670772July 2, 2025
POWER TRAIN
Unknown timeline for recall repairs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670789July 2, 2025
ELECTRICAL SYSTEM
Diagnostic: Video Processing Module includes replacement and reprogramming and calibrations Diagnostics when referred to in an automotive sense is the various testing done on the automobile to ensure safety and proper engine functioning. These tests are done with different sensors, computers and machines to establish a “cause and effect” relationship between what is working and what is not working with the automobile. The forms of diagnostics can range from brakes, to air conditioning, to suspension and many more. PARKING GUIDELINES ON SCREEN DO NOT WORK AND THERE IS A BLUE HOUR GLASS ON SCREEN. $2,200 estimate to repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670931July 2, 2025
ENGINE
Engine code P1098 indicating failure of Cooling Control Valve (CCV) at 2.5 years old, 49k miles. Display on dash indicates acceleration reduced warning, fan in engine bay running at high level while actual temperature reads normal.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670664July 1, 2025
ENGINE
Engine defect where engine can fail during travel. There is no known solution or proper notice given to me of any kind.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670237June 30, 2025
POWER TRAIN
I was going camping and pulling a small 20 ft trailer with my spouse and 4 young kids in the car when the truck stopped accelerating and would not go over 30 mph on the freeway and the fan started running. There was no warning light on the dash. I was then stranded 2 hour from home with my kids in a gas station parking lot and had to have the truck and trailer hauled home.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670317June 30, 2025
STRUCTURE:BODY
The chrome grille deflector detached yesterday while on the interstate and landed in traffic behind me. GM recall number N242490120 does not cover my vehicle, but the same thing is happening to newer models. GM says they won't cover my vehicle under the recall. Can this recall be extended to newer models?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11669631June 27, 2025
STRUCTURE:BODY
The tailgate opened without being released
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11669834June 27, 2025
POWER TRAIN
The contact owns a 2023 GMC Sierra 2500. The contact stated while driving 35 MPH, the vehicle gear shift was shifting independently, and the contact noticed the vehicle was shaking and the vehicle went into limp mode. The check engine lights illuminated. The contact pulled over to the right side of the road turned the vehicle off and then turned the vehicle back on and the failure persisted. The contact the gear shift was stuck in fifth gear. A dealer was contacted. The vehicle was taken to the dealer where it was diagnosed that the valve body needed to be replaced. The vehicle was not repaired. The manufacturer was notified on the failure and opened a case. The contact was referred by the manufacture to report the failure The approximate failure mileage was 50,823.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11669136June 25, 2025
ENGINE
Recall N252494000 GM has known about this issue since January (at least) and issued a recall in April. The attached form indicates they are recalling my vehicle but they are unable to repair it. This reduces my value and potentially leads to serious accident and serious injuries. How can GM get away with this? It is a BIG DEAL for a customer to have their vehicle recalled for safety issues like this but not have the manufacturer come out with a fix? What are we as customers to do? Wait until we or someone we love are injured or killed? Please, act quickly! Perhaps a full value buyback offer? Or actually replace the engines that they already know are defective. Changing the oil viscosity as indicated at various online sites DOES NOT FIX THE PROBLEM. Please advise what recourse I should seek. Thank you very much!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11668837June 24, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2023 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the engine seized. No warning light was illuminated. The vehicle was restarted; however, the vehicle failed to start. The vehicle was towed to the dealer where it was diagnosed with fuel pump module failure. The contact was informed that the fuel pump module needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 11,250. The VIN was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11668734June 23, 2025
ENGINE
The original engine in my 2023 GMC Sierra 1500 (6.2L L87) failed in November 2023 at only 2,872 miles. The dealership diagnosed engine knocking and discovered a damaged thrust bearing and crankshaft with metal debris throughout. The engine was replaced under warranty. In April 2025, GM issued Safety Recall N252494001 for the same engine model due to connecting rod and/or crankshaft manufacturing defects. According to GM’s bulletin, engine failure can result in sudden loss of propulsion and increase the risk of a crash. Despite already experiencing this failure and being within the affected model year and engine range, I have been told the recall remedy is not available to me because the campaign applies only to dealer inventory vehicles, and my recall status remains "Recall Incomplete: Remedy Not Yet Available." I requested a safety inspection of the replacement engine, but GM has refused, citing the incomplete status. When I escalated to GMC Customer Care, I was told they could not confirm whether my truck is safe or unsafe to drive. This is after already being stranded once with a family vehicle that cost nearly $80,000. I frequently drive with my family and feel I am being left at risk. GM appears to be prioritizing unsold vehicles while leaving current owners without support or assurance. The current engine has not yet failed, but I have no confidence it is safe, especially as it may include the same defective components described in the recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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