GMC Complaints

At approximately 58,565 miles, my 2023 GMC Yukon Denali equipped with the 6.2L L87 V8 experienced an internal engine failure. The vehicle had previously completed the applicable L87 engine recall remedy earlier in 2026. The vehicle developed a thumping noise and was inspected by an authorized GMC dealership. The dealer confirmed metal contamination in the engine oil and diagnosed a main thrust bearing failure. The condition was confirmed by the dealer and required complete engine replacement rather than a minor repair. The vehicle was out of service for approximately 31 days while the engine replacement was completed. GM authorized and covered installation of a complete factory replacement engine. The failed engine is available for inspection if requested. The failure created a significant safety concern because an internal engine failure of this type can result in loss of motive power while driving, potentially creating a hazard for the occupants and other motorists. I am aware that NHTSA is currently investigating L87 engine failures occurring after recall remedies. I am submitting this complaint because my vehicle experienced a documented internal engine failure after the vehicle had already received the applicable recall remedy and subsequently required a complete engine replacement. The replacement engine has not currently failed, and I am not reporting a failure of the replacement engine. However, I am concerned about the effectiveness of the remedy and whether the replacement engine incorporates updated or revised components intended to address the underlying failure condition. I have requested documentation from the dealership regarding the exact replacement engine assembly and whether it incorporates engineering or production changes related to the original bearing failure. That information has not yet been provided. No crash or injury occurred as a result of this failure.

Technician told me the engine "grenaded itself". "Cylinder #4 melted into the side walls of the cylinder wall caused by air to fuel mix ratio controlled by the ECU failure to mix appropriately." My family and I were traveling for Easter and were stranded on the side of the highway. I had a private repair shop (Greenville Auto Clinic LLC) confirm as well as the local dealership Greenville Chevy. The vehicle required an engine replacement. I did contact GMC's Zone Manager out of Atlanta, GA for assistance, he reduced the bill from over $10,000 down to $6098. There was no error messaging, only an engine that would not respond to the accelerator pedal. The engine would try to accelerate, but struggled to the point it would die when I applied too much pressure on the gas pedal.

13 unresolved problem codes relating to hard engine starting,rough engine running,vehicle initiating safe mode operation, upon a highway trip. P0016 engine code detected and Onstar messaged for immediate service. No resolution at dealership , after resetting codes an additional 9 are active / pending at 2nd dealership visit. Abnormal engine operation since , dealership advises a hard failure has to occur before a resolution can be instituted. Similar advice from GMC direct phone call in help line.

I purchased an Evenflo Shyft Intuiti Travel System with a Revolve180 LiteMax NXT infant car seat. The car seat was manufactured on 03/27/2025, model TS100212542. I was notified by Amazon that the car seat was recalled due to a calibration issue with the level indicator that caused the product not to meet applicable federal performance requirements. I contacted Evenflo ParentLink regarding the recall and was informed that Evenflo would provide only a repair kit and would not provide a replacement or refund. Evenflo's proposed interim solutions include using the car seat without the rotating base, using a non-rotating base, or using the rotating base with a modified recline or a load leg. These alternatives do not provide an equivalent remedy for the product I purchased. I specifically purchased this infant seat because the base is designed to rotate. Both parents in our household have back problems, and the rotating feature was an important safety and usability consideration when placing our infant into the seat. Removing the rotating functionality or changing the installation configuration does not provide an equivalent product. Because I did not consider the proposed alternatives acceptable for safely and practically transporting my infant, I purchased a replacement rotating car seat. Amazon ultimately agreed to refund the recalled travel system and arrange pickup of the product. I am submitting this complaint because I believe the recall remedy should be evaluated to determine whether it provides an effective and reasonably equivalent solution to affected consumers, particularly when the recalled product's primary functionality is lost under the proposed interim solutions. I am not reporting a crash or injury.

I have a 6.2L that we took in with bad rods due to the cam. The fixed the motor and now it is consuming oil and GM says it is normal. Normal for an engine to consume quarts of oil?? I cannot trade out of the vehicle because of the extreme depreciation that these vehicles have incurred due to the known engine issues. I know others are having the same issues I just want GM to make this right and help loyal customers.

The contact owns a 2021 GMC Yukon. The contact stated that while pulling into a parking space at an undisclosed speed, the vehicle stalled. The contact associated the failure with NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The vehicle was towed to a dealer, where it was diagnosed that the fuel pump control module had failed. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 81,000.

Rear wheel lock up. Very unsafe. I am on my 3rd valve body for my transmission. GM doesn’t want to replace transmission but will warranty for 150k miles. I bumped a semi during one of my lock ups.

I purchased a new 2024 GMC Sierra. I brought it to the dealer for the engine recall on the 6.2liter. It passed the inspection and the oil was changed to a heavier weight. After the recall was satisfied and the oil was changed to the heavier weight, around 45,000 miles, the engine failed at highway speeds while pulling a trailer and left my entire family stranded on the side of the highway; late at night. The engine completely failed and would not re-start. After researching the issue online and watching mechanics tear down these engines and suggest the problem, I believe that GMC has created great harm to the customers who've purchased the vehicles with 6.2L engines by allowing us to drive hundreds of thousands of "ticking time-bombs" across the country. Furthermore, it is absolutely infuriating to learn that problems clearly identifiable starting in 2021 were not addressed until a recall in April 2025. I strongly believe that G.M. has mishandled this information and put customers into vehicles that are verifiably unreliable and should correct the problem/take the hit to replace these faulty engines. !!TIMEBOMBS!! [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2025 GMC Yukon. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights illuminated. The vehicle was towed to a dealer, where it was diagnosed that the engine, radiator, and an unknown belt needed to be replaced. The vehicle was repaired; however, the failure recurred. While driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized upon arriving at the dealer location. The vehicle failed to restart. The dealer diagnosed that the generator and air conditioner failed and needed to be replaced. The vehicle was in the process of being repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 33,018.

The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at 60 MPH, the vehicle began to shake uncontrollably. A knocking sound was heard from the engine, and the vehicle entered limp mode. No warning lights illuminated. The contact was able to coast the vehicle to the residence. The vehicle was later towed to the dealer, where it was diagnosed that the engine failed and needed to be replaced. The contact associated the failure with NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in the recall, and the contact was advised to file a complaint with the NHTSA Hotline. The failure mileage was 81,000.