GMC Complaints

The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 70 MPH, the vehicle suddenly lost motive power, decelerated, and failed to properly accelerate while depressing the accelerator pedal. The check engine warning light was illuminated. After exiting the freeway, the vehicle stalled. The vehicle was towed to the residence and then later towed to the dealer for assistance. The contact was informed that there were metal shavings inside the engine oil. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired. The contact was informed that the VIN was not included in NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the recall. The manufacturer was not yet contacted. The failure mileage was 149,000.

ENGINE DIED!!,Had it towed to local dealer and was told I have L87 engine failure ,but the recall dosen't cover 2019 models. Service tech says it only covers 2021-2024 6.2 engines. Is there any action I can follow to be added to the recall. Thanks for your swift attention.

I am submitting this complaint to request that NHTSA investigate a potential safety defect involving the engine coolant temperature monitoring system, thermostat/engine coolant temperature sensor system, and its relationship to reduced steering assist in 2019 GMC Acadia vehicles. My 2019 GMC Acadia, currently at approximately 61,500 miles, has experienced the following symptoms: • The engine temperature gauge remains flat or reads abnormally low/cold. • The cooling fans run continuously at extremely high speed, creating a loud "screaming" fan noise. • The vehicle displays the warning message "Steering Assist is Reduced — Drive with Care." • The vehicle has a history of diagnostic trouble code P0128, "Engine Coolant Temperature Below Thermostat Regulating Temperature." I am concerned that these symptoms are related and represent a potential safety defect rather than an isolated thermostat or cooling-system repair. GM has issued bulletin PIT5967, "Service Steering Message With P0128," which applies to GMC Acadia vehicles from model years 2017 through 2023. The bulletin states that when P0128 is present, the ECM may be reading coolant temperature incorrectly and that a "Service Steering Message" may be displayed to protect the steering gear in the event of an undetected overheating condition. GM instructs technicians to diagnose and repair P0128 first. GM bulletin 17-NA-158 also describes a relationship between P0128, an invalid coolant-temperature signal, and the "Steering Assist Reduced, Drive With Care" warning. The bulletin explains that the steering module relies on valid coolant-temperature information to provide additional steering assistance under cold conditions. When the coolant-temperature signal becomes invalid, this function can become inoperative, potentially resulting in a heavier-than-normal steering feel.

6.2 engine seized again after oil change 3 days after This is my 3 rd Yukon that has done this and I’m not agreeing this shouldn’t be a recall I’ve been through this before

Engine started making a loud knocking noise and it sounded like the engine was about to throw a rod. Turned engine off and called GM. Vehicle was towed to dealership and it was diagnosed with a thrust bearing failure. My truck only had 14k miles on it. To fix the bearing issue, it will need a new engine. GM does not currently have engines to replace the faulty ones so it has sat at the dealership for 3 weeks with No ETA as to when it will be fixed. This is apparently a common problem in the 2025-2026 models LZ0 3 liter diesel. They are still selling these affected vehicles currently, knowing that they may have a problem. GM needs to issue a recall and take these vehicles back.

Going down the highway at highway speeds engine fully seized up almost cause an accident,, totally locked up engine, got towed to dealer and they said total engine failure just like in the priare years., been waiting for a new engine for almost 3month due to these failing on other cars,, they will be replacing my old engine with same engine that in prone to locking up. only a matter of time till the new one does the same thing. i want a buy back but they say it has 70k miles and its over the warranty and they wont buy back

I find the location of the lower gear shifters + and - to be physically far away from a driver's normal reach, making a driving hazard. If you want to change gears as is typical in mountain driving in steep descents, the driver has to lean awkwardly away from all mirrors and standard driving position making it a potentially hazardous situation for the driver and occupants to be in. It has nothing to do with comfort, but rather normal functionality, keeping the driver and their attention unadjusted on the road, all surroundings with minimal, if any changes to their physical posture while in the drivers seat. The location of the gear shifters are in a totally unorthodox location, nearer to the passenger, rather than the driver.

The Lifter on my GM Sierra AT4 truck with a 6.2L (L87) engine collapsed and damaged the engine shafts and cylinders in the block. While driving, the engine started to lose power, and a ticking noise started to occur. I pulled the car over to the side of the road and called the dealer, which told me to have the truck towed into the dealership. Metal was found in the Oil. The entire engine has to be replaced for $12K. I have a life time oil change service with the dealer an also an extended warranty, but my mileage was over the warranty by 6K miles. The warranty ended at 106K miles and actual milage was 113K. I reached out to my dealer and also to GM to discuss goodwill assistance and GM pushed back indicating they cannot do anymore. I asked the rep to esalate the ticket

Unknown. Went in to get inspection for the recall on the motor and it failed the test so motor was replaced. Now the I've hade the motor for 9 moths started hearing knocking in the motor and losing power.

I Purchased the vehicle on May 29, 2026 and it stated the 6.2 liter engine recall had been fixed and that I have extended special coverage for the exact issue of the recall until 150008 miles on this vehicle. On July 14, 2026 the vehicle was being driven and stalled out at a traffic light and restarted, yet within a quarter mile it stalled again at the next traffic light and became completely disabled, it would not even allow a shift into nuetral, so I had it towed less than 100 feet into the Walmart on Loudon Road in Concord, NH 03301 parking lot. On July 23, 2026 I was able to get the batter charged and attach a code scanner which showed one code (P0016). Pursuant to Recall N252494001 (which had allegedly been repaired, likely with the bandaid fix of thicker oil) any 6.2 liter GM truck with the loss of propulsion needs to be plugged into a scanner and if code P0016 is present, engine replacement is needed. Specifically noted to the recall is Special coverage N252494003 which provides the coverage to 150,008 miles on this vehicle is directly related to the recall. At the time of loss of propulsion the vehicle had 99,195 miles present on the odometer. The following day July 24, 2026 I had the vehicle towed to Banks Chevrolet GMC in Concord NH, after the vehicle arrived, I spoke with the service department, provided them with the recall paperwork and printout of the special coverage uner the vin as well as a photo of the odometer and my scanner displayining one code P0016. They then informed me it would take them until August 24, 2026 to "diagnose" the vehicle. The recall is clear it just needs a code scan if disabled. I have contacted GM and informed them of the need for a loaner as the vehicle is a vehicle utilized for business. I have since been told they will try to look at it earlier and no loaner will be offered but I "may" be able to be reimbusred $44.00 a day for a rental. There are no rentals for that price that can tow over 9500 pounds. It is unnacceptable.