2025 Chevrolet Suburban 1500: engine failure

Filed Aug 28, 2026 · Engine · 17,000 miles · FL

The contact owns a 2025 Chevrolet Suburban. The contact stated that while driving approximately 65 MPH, a banging noise was heard coming from the engine compartment, and the vehicle decelerated. In addition, several warning lights, including the check engine light and the anti-lock braking system light illuminated. The contact pulled over to the side of the road, turned off the vehicle, and had the vehicle towed to a dealer. The dealer diagnosed that the engine and radiator failed and needed to be replaced. The engine and radiator were replaced. Approximately 5 months and 6,000 miles later, the failure recurred and the engine began to run rough. The vehicle was returned to the dealer, where it was diagnosed that the engine failed again. The engine was in the process of being replaced. The manufacturer was notified of the failure and a case was filed. The failure mileage was approximately 17,000.

Filed May 18, 2026 · Engine · GA

3.0 Duramax engine failure at 5900 miles. Apparently is from the known thrust bearing issue. MIL, CEL, TCM illuminated. Failure occurred at 60 mph during rush hour traffic. Engine is being replaced under warranty. GM should issue recall for the affected lot of this engine.

Filed May 17, 2026 · Engine · GA

3.0 Duramax, thrust bearing engine failure. Less than 6000 miles on vehicle. Driving at 60 mph when vehicle went into major limp mode. Had TCM, Charging and coolant lights illuminate. GM is replacing engine under warranty. Indicated there was approximately a 2 week engine production window where this issue is being traced back to. GM should issue recall if they know the extent of condition and the cause(s).

Filed Feb 24, 2026 · Engine · NJ

Driving on Highway at approx 70mph, lost propulsion and speedometer went to 0. Came back after approx. 5 seconds. After exiting highway and stopping, clear knocking/clanging noise from engine. GM states full engine replacement needed. This is a 2025 6.2 V8, thought these issues were fixed?

Filed Feb 2, 2026 · Engine · NY

We have 8,625 miles on our 2025 Suburban. We were going down the highway when began to hear a unfamiliar noise. We pulled over into an error to inspect and didn't notice anything under the vehicle, which we thought might have cause the noise. We put into drive and went less than an 1/8 of a mile and our suburban lost acceleration and stopped. It would not start and couldn't not be moved, until roadside assistance took it to a Chevrolet dealership. The dealer stated the engine seized up and needs to be replaced. We were fortunate we were not going any more than 20 miles per hour and were not on a major highway.

Filed Jan 25, 2026 · Engine · MO

The engine failed right in the middle of a intersection completely shut down, locked up the motor

Filed Jan 24, 2026 · Engine · GA

The engine self-destructed due to a thrust bearing failure as described in General Motors Technical Service Bulletin 25-NA-307 There were no warning lights prior to the engine failure. The vehicle has been inspected by Carl Black GMC in Roswell, GA and been found to fall under the Thrust Bearing Failure TSB According to the service technician, these engines have been failing in large numbers.

Filed Jan 20, 2026 · Engine · MI

Was driving on highway and engine started to make a noise, performance and power were impacted, the engine service light appeared. Exited highway on near offramp, when on offramp vehicle engine stopped working. Vehicle is a 2025 Chevrolet Suburban with 6.2L engine. Dealer has stated engine is seized. Seems exactly like the current 6.2L engine recall for 2021-2024 model years that results in engine failure. Vehicle is 7-8 months old, and only has roughly 12,000 miles.

Filed Jan 13, 2026 · Acceleration, Engine · FL

Engine failed going 70mph on highway at 2k miles. Display said acceleration no longer available and app said transmission code was needing to be checked however once taking to dealer I was told it was an oil sensor then told there was shredded metal in my engine and I needed a full engine replacement. My car was in the dealership for over 50 days. I was pregnant and with two small children in the car when engine failed at high speeds. After my car was returned to me the engine overheated and failed again. The dealer claimed GM sent them an engine with cut hoses. I was 9 months pregnant when this occurred also on the highway going 65mph. GM refused to buy back the vehicle 3 times.

Filed Jan 13, 2026 · Engine · AZ

While driving we received a notification on our dash board stating “reduced acceleration drive with caution”. We had it towed to the dealership where they said we needed a full engine replacement. It took 22 days to get the vehicle back

Filed Oct 31, 2025 · Engine, Transmission · CA

Purchased the vehicle on April 7, 2025. On 7/15/25, the car had 6948 mi. and started running rough, had a loss of power, an odor from the engine, and then on the display: check engine, blinking green vehicle light, and a message stating that the car was lowering for stability control. Took the vehicle to the closest Chevrolet service. The service dept. determined that code found P0307 and P0300, cylinder seven had the most misfires above 500. After completing oil service, the vehicle began to click on the passenger side; however, it was not misfiring. They inspected and found potential lifter issue. Found ticking coming from cylinder 7 and verified misfires. Found 2 pushrods damaged. Heard noise coming from cylinder 4, removed valve cover, removed rocker arms, and found 1 pushrod damaged. They removed and replaced all lifters and 3 pushrods. They stated there was no more noise //after this repair. These repairs were completed on July 25, 2025. On 8/15/25 took back to service because it continued to run rough and made excessive noise and whistling when starting the vehicle. The dealer inspected and heard the noise, inspected the vehicle exhaust leak, checked exhaust manifolds, pipe connections, and determined there were no issues found. On 9/26/25 at 11,821 miles the car was making excessive noise, running rough, and was losing power. Drove home, and the vehicle was running rougher and losing power. No check engine lights or warnings were present. Drove home, and the vehicle was running rougher and losing power until it turned off. Towed in. Maintenance techs determined catastrophic engine failure, all bearings and engine rods seized. After this repair hen the catalytic converter failed. This car has been out of service due to engine failures for 43 days out of the 204 of ownership.

Filed Oct 2, 2025 · Engine · WA

Cause unknown, however, I have discovered that the engine in my Suburban, the Engine code LZO 3.0L Duramax, has damaged itself internally. I have been told that there is a large batch of engines that have this same problem, and the dealership I sent my car to has several cars in the same position. This problem is causing the engine to lock up or completely quit. This could be serious depending on when this failure happens. Currently, they are telling me that I am months away from getting a new engine due to a back order. Vehicle still in shop, so I do not have records yet, but I will be happy to give them once I have them.