Engine failure, losing engine coolant and engine oil. After change oil, roughly 1500 miles, engine losses about 3-4qts of oil.

- Billings, MT, USA

On 12/28/2024, while accelerating on the highway, I received without warning a reduced engine power warning and the RPM's were racing when I depressed the gas pedal. I was in moderate traffic in excess of 55 MPH and had difficulty safely making it to the right shoulder of the roadway as traffic was passing by at a greater rate of speed than I was able to travel. The vehicle would not go more than 30-35 MPH and it would not go into reverse after I was able to make it to a safe location. It was towed to a local dealership where I was later advised it was a transmission issue (valve body). The vehicle remains at the dealership awaiting repair as there is a large backorder for the valve body (I was told 8 at this point).

- St. John, IN, USA

Vehicle transmission bangs at 50-65mph so much so that the vehicle goes into limp mode. Code appear on dash, must shut truck off and wait on side of road til goes back to normal idle. Restart vehicle, the engine light stays on for the next 3 starts then clears til it happens again.

- Brockton, MA, USA

While traveling back from Labor Day Weekend on [XXX], I was driving in the Dallas Fort Worth area when I experienced loss of power to our vehicle on a major highway [XXX] and [XXX] ) and directly on a bridge with my entire family in the vehicle (4 kids and all of our luggage). It was a very dangerous and scary situation. We had to wait one hour for a tow truck to come and take my vehicle to the closest GM dealership. I was left stranded, 3 hours from my home with my four children and luggage. The Chevrolet dealership contacted me 9 days later and informed me the technician looked at the vehicle and determined the engine was locked up/seized. It would take 9 months to get the vehicle back into the shop to determine what caused the issue and then take 6-12 months for a new engine. I have a family of 6 and I'm left car-less for two years. Yet I still have to make the monthly payment on a vehicle that I won't be driving or be in possession of. MY BIGGEST ISSUE: GM has known that they have had engine issues for many years. Particularly, with Dynamic Fuel Management causing lifter issues which leads to engine failure, yet never disclosed this to me when I purchased the vehicle. Furthermore, they never disclosed that the issue was so prevalent that motors were back ordered for over a year. Consumers are being misled into spending their hard earned money on vehicles that have major mechanical design flaws known to the manufacturer. Once the mechanical flaw is realized, the vehicle can't be repaired for up to two years. Hiding this data from consumers should be criminal. Furthermore, General Motors to this point has been no help, with the GM customer satisfaction team telling us they can't do anything until a dealer diagnosis the issue, and the dealer stating they can't diagnose the issue until May of next year, at which time they would then look to order the motor which will take 9-12 months to deliver and install. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Lawn, TX, USA

- Truck makes a sizzling sound when parked - Car wouldnt start and needed battery jump, unknown source draining the battery - Truck has engine issues, started shaking and died in the middle of the highway, GM replaced engine - Engine replaced after less than a week, truck would not start, Gm replaced starter - After 2 days and using the vehicle once, truck would not start again. GM is trying to root cause issue but cant find a resolution Since the car stopped when we were on the highway and none of the fixes seem to be working I am worried that the car will abruptly stop again and put my life and others at risk

- East Stroudsburg, PA, USA

Engine failure at 27k miles on a highway going highway speeds (45-50 MPH). This failure happened on a night when it was 5 degrees and dropping, vehicle full of my family + my parents. Complete engine failure, no way to run heat or move the vehicle at all. Engine failure #2 at 37k miles while driving down a 2 lane road, was able to pull into an apartment complex Complete vehicle infotainment failure, not able to use handsfree device, backup cameras, front and rear safety sensors. Engine failure #3 at 65k miles on a 4 lane highway going 65-70 MPH. Was able to get to a turn lane. Engines have shuddered / lost power steering / electrical many times while going 70+ MPH on 3+ lane highways

- Peachtree Corners, GA, USA

Vehicle became disabled and will not start due to failed fuel pump control module. This could be very dangerous if this would have happened in traffic; or, if vehicle occupants became stranded in an unsafe area. Vehicle must be towed to dealership to affect repair.

- Saint Johns, Fl, FL, USA

When I started up the vehicle with the key fab button I noticed the cabin air blower came on as normal however when we went to the cockpit we noticed the engine was not running. When we went to start the vehicle (holding break and pressing start button) the dashboard started the Z71 launch sequence and then went to a dashboard as if I was in the normal drive mode however the dashboard was extremely dimly lit as if the backlight was not on and the engine still was not running. After several attempts to start using the brake+start button method we noticed a clicking sound that seemed to be coming from the engine cabin just in front of the passenger cabin however it would never ignite/start the engine. After several attempts to start the engine through the brake+button, we tried to just press the start button, which would sometimes be prompted on the dashboard, and get some feedback from the dashboard through better backlighting and messages I now cannot recall but never ignited the engine. When we tried again with the key fab x2 button (hoping it would either start or "cancel" the current vehicle state), we received no response from the vehicle. When we attempted to shift, it stated the "conditions were not met", which I perceived as the correct response. The vehicle was stuck in this "mode" with the air blower still running and exterior lights still on and it was only a matter of time until the battery ran out. When it ran out later that day (though not completely ded) in rebooted in the same tweener mode. However, when we came the next day with a tow truck and a fully dead battery in the Suburban, the vehicle booted right up as normal. The tow truck driver indicated several new Tahoe drivers experiencing the same issue. To me, this is a software launch issue. While the vehicle was not perceived to be in danger, it left us stranded in what could be a dangerous location. Several episodes as reported by tow truck. Unsure if inspected. No symptoms before problem.

- Birmingham, MI, USA