L87 Engine suddenly, withoiut warning started having a severe engine rod knock. Safety put at risk because the engine could blowup and lock vehicle up. Dealer confirmed rod knock and will replace engine under warranty. ZERO prior indication (No SES or other warning lights).

- Laveen (Maricopa), AZ, USA

Brand new 2023 Yukon with 800 miles, 1 week into ownership, engine died while driving on 4 lane highway with no shoulder. Died, lost power steering and power brakes shortly after trying to maneuver to side of road. Vehicle was towed to dealer and they found a spun rod bearing resulting in catastrophic engine failure and had to have engine replaced.

- Buda, TX, USA

Blown motor on 2023 Yukon (after owning the SUV exactly 1 month). 3600 miles on it. Picked it up January 9, 2023, motor blown on Feb 9th, 2023. From my dealer: Tech found perform tear down on the engine- remove lower oil pan and discovery metal inside the oil pan. perform inspect on the bottom engine and found rod bearings spun- causing internal premature engine failure. Final ticket write up included: engine appeared to be -??starving for oil-?? cylinders #5 & 6 piston rod bearings seized. Major internal engine failure. I went through the full engine replacement at a local dealer then dealt with GM for 2 months and eventually they did fully replace this vehicle with a new 2023 GMC YUKON. Luckily expedited the build as the first one took 9 months to receive. we took deliver of new vehicle in June of 2023. Can provide the new VIN if necessary. Current 6.2L has about 30k miles on it.

- Hacienda Heights , CA, USA

The engine turned off while driving TWICE with NO WARNING. The first time the engine turned off without warning doing around 60MPH but was able to be restarted and ran normally for about a week or so. The second and final time that the engine turned off without warning was about a week after the first incident. The engine would not restart, in fact, it would not even crank. The vehicle was towed to the dealership where it was determined to be a crankshaft bearing failure causing a bottom end engine failure. Metal shavings were found in the oil pan. Vehicle is only 14 months old and has 22,754 miles. All service was done by dealer at manufacturers suggested intervals.

- Mantua, NJ, USA

Passing a semi up a hill going 75 and the motor shuts off. As the Yukon slowed, the semi slowed down as well. It was difficult trying to get the Yukon to the right shoulder. There was no warnings or anything on the dash. The vehicle just quit running. Tried restarting and it was like the battery was dead. Got it towed to a dealership and they said the engine was ruined from 6 of the 8 rod bearings disintegrating. Took almost a month to replace with the problem being so common and no engines available.

- Donnbrook, ND, USA

Yukon with 6.2 V8 suffered crankshaft bearing failure. Vehicle had only 9800 miles on it. No warning. Vehicle shifted itself into neutral and engine shut off. Engine replaced under warranty.

- Huntersville, NC, USA

1. The authorized dealer repair center stated my engine has failed and needs to be replaced. It is currently at the dealer so it's unknown if it is available for inspection. I'm sure if the inspector would go to the dealer I can make that process happen. 2. The point of complete engine failure has not occurred as of yet to me so It is unknown how this would effect my safety. One would have to assume that engine failure could always be a safety problem if driving when it occurred. 3. The problem I reported has been confirmed by the authorized dealer. 4. The vehicle has been inspected by the authorized dealer repair center but I am not aware of any other people that performed same inspection. 5. There was a knocking noise come from the engine when I accelerated and loss of power when accelerating. The noise was first detected 12/24/24 and I made an appointment with the authorized dealer repair center online. My vehicle was dropped off the first available day on 12/26/24. I have time & date video of the engine issue if wanted.

- Brentwood, TN, USA

While passing on a two-lane road at approximately 70 MPH, the vehicle stalled and acted as if the engine wasn't running. Pulled over to the side of the road and was able to restart the engine after shifting to park. Engine was harder to start than usual and cranked slowly. After restarting, the engine ran fine for the remainder of the trip, but would occasionally have difficulty cranking. After this incident, the engine developed a knock that would vary with engine RPM, and sounded like a defective connecting rod bearing. Pulled the dipstick and noticed metal shavings in the oil. Took the vehicle to local dealership who confirmed the engine was defective and would require replacement. Vehicle has been at the dealership since December 5th waiting for a backordered engine.

- Rio Rancho, NM, USA

I-??ve had the engine blown and replaced twice. The first time it failed in the middle of an intersection. We could not put it in neutral to move it. We had to call a tow truck. No check engine lights just a noise. The engine had failed bc the bearings couldn-??t get oil. The second time it blew I was driving down the interstate and same thing only a noise so I pulled over and the car died. Also had to call a tow truck. It was the same as the first time the engine had blew because of the bearings not getting any oil. So now I-??m on my third engine in a 2023, hoping that it doesn-??t do it again.

- Burns Flat, OK, USA

On March 15, while driving on a busy road our vehicle STOPPED from catastrophic engine failure without warning which put my family and I instantly in danger and nearly got us killed. Due to the high traffic where it stopped we were scared to stay in the vehicle and also scared to exit it.. so we contacted the police before calling a tow truck. When the police arrived, they parked a car in front and behind us and put their flashers on to make us somewhat more safer... we had the vehicle towed to the local dealership and contacted the actual dealership where we purchased this brand new vehicle with zero miles that was about an hour away and they sent soneone to get the SUV. Once they ran a diagnostic they discovered metal shavings in the oil and said it needed a new engine! What's alarming is that after hearing this we started googling terms like "Denali engine failure" "Cadillac ecalade engine failure" and discovered a huge amount of consumer complaints from other GMC customers on forums with their brand new GMC vehicles with little to no mileage and ALL had the metal shavings in the oil and shockingly needed new engines! FYSA- All complaints are on the 6.2 engines specifically. This is a huge safety issue as these vehicles are stopping in the road without warning. If someone doesn't do something I'm afraid someone is going to get killed. Please look into this and help us. We paid over $100k for a vehicle we no longer can trust. We were not given a police report but I'm sure the information about this incident is available by FPD since they were called and remained on scene with us for nearly an hour waiting on the tow truck. The dealership was great by the way, we do not blame them as we feel they are victims too. This is a GMC problem who are knowingly building and selling unsafe SUVs with the 6.2 defective engine that's literally stopping without warning while driving.

- Fayetteville, NC, USA

Vehicle shuts off and goes into neutral at highway speeds I am reaching out because it has happened to me three times in a seven month old vehicle and also five family members with Yukon Tahoe, Escalade same issue is very very dangerous please, I beg you take this very seriously and contact me so I could verify to you the other owners that I-??ve had the same issue, but have not went far enough to make a complaint. I will prove it to you with other owners, same problem, where the vehicle just shuts off.

- Detroit, MI, USA

After driving on an Interstate Highway for approximately 2 hours I exited and brought the vehicle to a complete stop at a stop sign while preparing to turn right onto a busy 2-lane road. I applied moderate gas pedal pressure and the vehicle momentarily accelerated and moved forward but then the engine stalled as the transmission was attempting to shift automatically from 1st to 2nd gear. The vehicle was partially stuck out into the busy road without any power. This created a traffic conflict and near-miss with cars traveling along the 2-lane road that I was attempting to turn onto. I restarted the vehicle and drove it slowly onto the shoulder. The vehicle-??s engine repeatedly stalled any time enough gas pedal pressure was applied to cause the transmission to attempt to shift from 1st to 2nd gear. This issue only occurs after the engine and transmission have been running at operating temperature for several minutes. The dealership could not duplicate this issue, but they only drove the vehicle a total of 7 miles over two different occasions. The vehicle was purchased new on June 23, 2023 and had approximately 1,700 miles on it when the issue first occurred. There were no warning lights or messages illuminated prior to the engine stalling. Vehicle is currently at a dealership service department being evaluated.

- Peachtree City , GA, USA