The engine seized up at approximately 20,000 miles while exiting the highway. I took the vehicle to GM and they needed to replace the entire engine. I was told it was a common problem with the 6.2 engine by the service manager.

- Medinah, IL, USA

Engine suddenly started knocking and loss of power while driving on the highway. If engine had stopped or locked up it could have caused an accident. Took it straight to my dealer on Dec. 30, they said to leave it that the knocking was coming from lower part of engine. Couple weeks later they called and told me it was crank bearings. Very disappointed I only have 11000 miles on it.There was no prior warning lamps or symptoms. They have a new engine on order but said there is a nation wide back order, so no way to know how long it will take to find one.

- Tremont, IL, USA

6.2L Engine burning excessive oil, so dealer per GM started an Oil Consumption test at 34,457 miles went through the process until 45,145 miles and dealer took it in at 45,468 to tear down engine, I contacted GM Aftersales and Customer Service VP and he had a representative start working the case, Engine was found to have scored cylinders on the driver's bank decision was made to replace engine. Engine was replaced and picked up vehicle and was told to bring it back in 5k miles for an oil change. I brought it back in 1k miles and retained the filter and used a filter cutter and inspected the filter. Filter had a significant amount of Metal and Metillac pieces imbedded in the filter (I have the filter still) I reported this to the Dealer and GM Aftersales and Customer Service, They noted this a normal! I then had the filter only changed at 500 more miles and still contained some debris, this is the second truck that I have owned the first was a 21 same issue first replacement failed in 25 miles, 2nd motor failed at start up and then I traded into this 22' and took a major financial hit on trade in, then a 3rd motor in the 21' and it made it so the truck could be wholesaled or sold, by this time I had bought this truck that has just had the motor replaced and currently have 7k on the new motor which was replaced under warranty. I feel confident that the metal debris that was in this engine is a contributing factor if not the factor that is causing the engine failures and suspect this engine will have the same demise. I welcome you to take possession of the filter and inspect it yourself. I have a video of the filter that I would be glad to share. These engine failures have cost me $25,000 in trade in loss.

- Dacula, GA, USA

Rod and bearing failure at 80k miles. I was driving down the road and the vehicle turned off leaving me stranded on the road.there was no warning

- Dewitt, MI, USA

6.2L motor shut off with no warning with message on dash to shift to neutral and press start, nothing happened. Was able to restart and drive to dealership. Truck was diagnosed with blown motor (lower bearing failure) and new motor ordered.

- Westboro , MA, USA

My engine locked up on me 3 times without notice or warning at all while driving 75-80mph down the highway. All the times myself and my family were put in danger of being hit by traffic and the locations were the vehicle stopped was around a curve where other drivers wouldn-??t notice until it was too late. Freezing cold and could stay in the vehicle scared we might get hit while inside. Second time it stopped at around 10:30om in the middle of nowhere in [XXX]. Even the cops couldn-??t get us tow. Finally 6 hours later a friend had to come get us. I reached out to the GM CEO per email and no reply. I tried to get them to take the vehicle back and after supposedly fixing the engine after having it for 3 months I got it back with no loaner to use during this time. The engine failed again a month later. Again after supposedly fixing the engine it failed a third time. If failed the first time in January 2024 and the second time in May 2024 and then the third time in July 2024. I have anxiety and now taking medication from even driving this vehicle afraid it will stop again. Replacing the engine isn-??t acceptable to me. Please help. The first place to to rebuild the engine Crossville, TN (Dave Kirk Chevrolet GMC), then it to Parks Buick GMC-Greenville: 2640 Laurens Rd, Greenville, SC 29607. and then to Loves Buick GMC, 736 Saturn Pkwy, Columbia, SC 29212. I have all the email sent to GM leaders and their executive leadership team. My vehicle had only 22,000 miles on it and I guess doesn-??t fall under the lemon law in SC so they didn-??t want to take it back. I feel helpless in this situation. Even getting a lawyer isn-??t guaranteed a win and then I-??ll be out of more money. Being a [XXX] this really sucks to be treated like my life and family life doesn-??t matter. I bought the vehicle brand new from Jim Buick, GMC, Cadillac in Columbia, SC. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Lexington , SC, USA

My truck lost power while driving on the interstate.. had to restart while traffic moved around me.. truck eventually restarted and then again died while getting off exit ramp in traffic. Towed to Dealership and was diagnosed with a "blown" rod bearing. Full Engine replacement.

- Clarkston, MI, USA

Truck engine just died while driving. Engine is unrepairable with metal in the oil. Has only 105,000 miles

- Manlius, NY, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving on the highway at 70 MPH and depressing the accelerator pedal, the vehicle failed to accelerate as needed, and the vehicle started losing automotive power. The contact pulled over to the side of the highway and turned off the vehicle; however, the vehicle failed to restart. No warning lights were illuminated. The vehicle was towed to a local dealer where the vehicle was diagnosed, and the contact was informed that the push rods were faulty, and that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage 25,000

- Allen Park, MI, USA

on 12/14/24 my engine shut off while passing 18 wheeler, on my dash it said: start vehicle again. Vehicle had no power and i was forced to pull over on the side of the road. Was not able to crank the vehicle and a tow truck was called to tow my truck to the dealer. A week later i was told there was metal in the oil filter and engine replacement was required

- Brownsboro, TX, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that while her husband was driving approximately 75 MPH, there was an abnormal sound coming from the engine compartment. The contact stated that the vehicle stalled, and the instrument cluster had gone blank. The contact stated that her husband was able to coast to the side of the highway and stopped the vehicle. The contact-??s husband attempted to restart the vehicle several times, but the vehicle failed to start. The vehicle was towed to the dealer to be diagnosed. The contact was informed that the engine had seized, and the 12-volt battery harness had short-circuited. The vehicle was in the process of being repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 65,000.

- Fort Smith, AR, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated while her husband was driving 40-45 MPH, the vehicle experienced reduced engine power and failed to exceed 30 MPH. The driver was able to pull to the side of the road. The driver turned off and restarted the vehicle. The contact stated that upon shifting to reverse(R), the RPM decreased, and the vehicle failed to respond. The driver was able to drive to the dealer, where it was diagnosed that the transmission had failed, and there were metal shavings inside the transmission. The dealer determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a related recall. The manufacturer referred the contact to the NHTSA Hotline for the VIN to be added to a recall. The failure mileage was approximately 90,000.

- Plummer, ID, USA

The coolant control valve failed, and there is a recall for a software update for a valve issue in the transmission. The DEF system is flawed with the level being shown by approximate using a computer to calculate versus a level sensor or sending unit. My NOX sensor was replaced and the check engine light came back on for the same reason. It ended up being corrected by filling up the DEF.

- Austin, TX, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that her son had called while pulled over to inform her that the vehicle was driving rough with the check engine and several other unknown warning lights illuminated. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the engine had failed and needed to be replaced. The contact stated that the dealer had since closed, and the vehicle was then towed to Marty's GMC (5 Kingston Collection Way, Kingston, MA 02364); who confirmed that the engine needed to be replaced. The vehicle had not yet been repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was 78,000.

- Pembroke, MA, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at various speeds, the engine was making an abnormally loud knocking sound. The contact stated that the engine would run quietly and then begin making the knocking sound intermittently. The knocking sound had increased in loudness over time. There were no warning lights illuminated. The vehicle was taken to the dealer who identified the failure as normal. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The failure mileage was 25,000. The VIN was unavailable.

- Orlando, FL, USA

In the past 6 years I have owned 4 GMC 6.2L trucks the first was a 2019 no issues great truck. The second unfortunately had a Short life with another vehicle. In 2023 The third a 2021 Denali 6.2L truck at 34k began using oil and blowing blue smoke out the tailpipes. The dealer started an oil consumption test (like you couldn-??t see it happening) so finally at 45k they tore down the engine and found worn out valve guides and scored cylinders. They ordered an engine the engine was installed and it failed in 25 miles come to find out it was not oiling on one bank, A second motor was ordered and installed it failed at start up. At this time it had been months that the truck was down. The dealer took a stand and moved me into a 2022 GMC AT4 with 6.2L with the hopes of removing the issue this truck was the internet sales managers truck that he had recently bought and had 15k on. We made the deal, well at 35k this truck begins consuming oil. The dealer once again starts the oil consumption test process. A couple of months ago. The truck now has 42k or so on it and on my last trip from Atlanta to Fort Walton after the dealer just topped it off 2 1/2 weeks prior to the first 2500 interval of the oil consumption test, the truck burned 1 1/2quarts in less than 2k miles and the oil warning light comes on as we arrive in Fort Walton. I would like a resolution to this, I have invested a lot of money into what should be one of the most reliable trucks on the road and all I hear is GM says it-??s not met their threshold of a problem and you should expect to have to add oil to a truck with less than 45k on it and it-??s not a problem. It-??s already been proven with the 2021 that GM has a problem, I as well as the other 100,000 or so individuals with this same engine and GM knows it-??s a problem with the quality of the engine build. GM has a quality issue and knows it but they are not addressing it, just making the consumer jump through hoops and not finding a fix in 5 yr's is bad

- Dacula, GA, USA

The contact owned a 2022 GMC Sierra. The contact stated that while driving at 45 MPH, the vehicle went into safe engine mode and stopped. The vehicle attempted to restart without application multiple times. There was an abnormal grinding sound detected. The contact pushed the start/stop button, and thirty seconds later, the contact noticed white smoke from the engine, and the vehicle caught fire.? There were no warning lights illuminated. The occupants were able to exit the vehicle. There were no reported injuries, crashes or police reports filed. the air bags deployed due to the fire. The fire department extinguished the fire. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The vehicle was towed to a tow lot. The insurance agent conducted an independent investigation and found that the wire harness in the engine was hot and severed the fuel line. There was fuel in the engine. The insurance company deemed the vehicle a total loss. The manufacturer was contacted, who took possession of the vehicle from the insurance company. The failure mileage was approximately 30,000.

- Chesterfield, MI, USA

On June 8th I started my truck and it made a strange unfamiliar noise before starting. I thought it was bizarre. Shortly after I stopped in traffic and my truck stalled out. It stayed on but when I went to give it gas I didn-??t move. So I restarted the engine and the same strange noise was made. Along with the noise I smelled something funny so I pulled into a gas station. Little did I know my truck was on fire. I got the vehicle away from the gas pumps and within 5 minutes the whole truck was on fire. Before this fire I had brought the vehicle in for service due to a check engine light multiple times the codes will be listed below. I also had an interlock device installed in the truck at the time.

- Wells, ME, USA

Just got off the highway was at stop sign on exit ramp and it just died. No warnings no lights no indication that something was about to happen. No neutral so couldn-??t even push it out of the way of traffic. Had it towed to shop for diagnostic. Possible lifter problem. $600. Dealership towed it to their shop. Engine tear down, lifters replaced. Gmc to pay 30%, dealership paying $1000, me $1300. Dealership started truck and the crank bearing spun. Now needs new engine, which are on back order. Cost "?? How long before engine available??" This is a known problem by the dealerships, GM & repair shops. Had we still been on the highway when this occurred doing 75mph we could have been killed.

- Afton, MI, USA

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, he heard a knock sound coming from the engine compartment. No warning lights were illuminated. The vehicle was taken to the dealer, and during an inspection, the engine seized, after which the dealer diagnosed a failure with the rod bearings. The vehicle was repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 31,000.

- Conway, SC, USA