2023 Chevrolet Tahoe: engine failure

Filed Oct 30, 2026 · Engine · MI

I own a 2023 Chevrolet Tahoe equipped with the 6.2L V8 engine. The vehicle has experienced repeated significant engine problems, including a previous complete engine replacement and subsequent issues with the replacement engine. The original engine required replacement due to engine-related problems. Following that replacement, the vehicle developed lifter noise and required another extended stay at the dealership for repairs. The vehicle has now been out of service for approximately 4–5 weeks while the dealership attempts to diagnose and repair the issue. After the dealership completed work to address the lifter noise, the technician identified an additional concerning engine noise. The dealership has since reported suspected bottom-end damage in the crankshaft area and has escalated the findings to GM engineering for further diagnosis and repair recommendations. I am concerned about the recurring internal engine failures, particularly given that this is the second engine installed in the vehicle. These problems raise serious concerns about the reliability and safety of the 6.2L engine. A failure involving the crankshaft, connecting rods, or internal engine bearings could potentially result in sudden engine failure or loss of power while driving. The vehicle has been inspected by an authorized GM dealership, and the current suspected damage has been reported to GM engineering. The final diagnosis and recommended repair are still pending. I am requesting that the federal safety agency review these repeated engine failures, including failures involving replacement engines, and investigate whether there is an ongoing safety or manufacturing defect affecting these vehicles.

Filed Oct 25, 2026 · Engine · NC

The car had the recall done for the engine issues 1 year ago. Pico test past and oil was changed to new oil. All service is handled by Chevrolet dealer. Now the issue. After leaving home and driving on a highway for about 25 minutes I received lights on the dashboard indicating. Several issues. Flashing engine light, ecm issue amoung some others. I then noticed what sounded like a missfire of the engine. Since I was on my way out of town I decided to turn around and take directly to dealer. I dropped the car off. When I finally turned the car off at the dealer lot and restarted it I also noticed metal clanging coming from engine. The next day I was texted by the dealer that I would be getting a new engine. Car has 78,644 miles.

Filed Oct 25, 2026 · Brakes, Electrical · MD

Description of the safety problem On XXX, shortly after starting the vehicle and beginning to drive, I attempted to apply the brakes and discovered that they had essentially frozen up and were not functioning properly. At the same time the vehicle displayed the following warnings: Service ESC, ABS warning light, brake system warning light, "Trailer Brakes Disabled – Service Required," traction/stability control warning, and check engine light. I shut the vehicle off and restarted it. After the restart the brakes appeared to function normally again and most warning indicators disappeared. However, the check engine light remains illuminated, and I have noticed a slight hesitation when starting the vehicle. I have photographs of the warnings taken at approximately 21,029 miles. Relevant history This vehicle was purchased new. The original 6.2L engine suffered a catastrophic failure at approximately 18,685 miles while traveling at highway speed and was replaced under warranty. None of the current problems existed before that engine replacement. Since the replacement, the vehicle has experienced multiple electrical failures, including windshield wipers becoming inoperative while driving in rain, intermittent loss of electrical power and starting problems, steering-related and collision-system warnings, and tire-pressure warning discrepancies. During a recent dealership visit to Ourisman Chevrolet (service advisor [XXX]) for multiple electrical malfunctions, I was told the problem was simply that the battery needed to be charged. The problems have continued, culminating in the XXX braking malfunction. Request I am reporting this as a potential safety defect affecting the braking, stability control, and electrical systems of this vehicle, and I request that the federal safety agency record and review this complaint. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 20, 2026 · Engine · MO

At 60,720 on car miles engine failed. This is the second engine failure. Dealership perfomred test per recall on second engine, and engine failed less than 30,000 miles later. Experienced loss of power for a few minutes before failure. The replacement engine had 52,000 miles on it.

Filed Oct 12, 2026 · Engine, Fuel system · CO

On 4/23/25, the check engine light came on and the vehicle reduced power. It was taken to dealership and a warranty service was performed, L87 Engine loss of propulsion. The vehicle was in service for 90 days. On 7/15/26, vehicle shifted itself into neutral while driving on the highway, with 4 kids in the car. This is a safety issue for our family and all around us, as car loses ability to drive at interstate speeds. It would not go back into drive, needed to pull over and get towed to dealership. Dealership diagnosed it needed a new engine and radiator; it was in service for 60 days. On 10/10/26, vehicle shifted itself into neutral while driving with one kid in car while driving on the highway. Vehicle gave the "conditions not correct for shift" and would not go back into drive. Vehicle was shut off and was stalled on the highway, after a time of it being off, vehicle started back up and the check engine light was on. This is a safety issue for our family and all around us, as car loses ability to drive, once again, at interstate speeds.

Filed Oct 8, 2026 · Engine · CA

I was picking my Tahoe up after a replacement on the blown motor was complete. (L87) I started it and immediately knew something was wrong. I reported it to the service advisor and the response was there were no warning lights so it must be fine. I asked them to sit in my car and they agreed it was not running right. They took it back and replaced a sparkplug that was causing the #2 cylinder to misfire. Almost 3 months later I was driving on the freeway when my Tahoe felt like it was going to stall. Again I had no warning lights appear. The diagnostics showed the same #2 cylinder misfiring caused by another sparkplug issue. This is all within 2,500 miles on a brand new engine.

Filed Oct 8, 2026 · Engine · VA

First occurrence was 2/03/24 check engine light came on felt stumble in engine continued driving to get home set up appt with dealership. They codes P318C and P318F were present numerous things were checked and found excessive crank shaft end play, removed oil pan and found thrust bearing in bottom of pan broken into pieces. GM authorized engine replacement. The vehicle had 4,603 miles on it. Repairs were completed and vehicle picked up 03/12/24 Second occurrence was 05/28/26 while driving at interstate speeds heard squeaking noise then knocking sounds coming from engine was able to make it home and had vehicle towed to dealership the next day. This time no codes but was determined to be defective engine and was replaced again mileage on vehicle this time was 33,521 miles I started using the 0w/40 oil as soon as recall came out actually before I received information in mail I am hearing rods rattling at start up now until oil pressure picks up on the latest engine installed but it still is running at present time.

Filed Oct 6, 2026 · Engine, Fuel system · NY

While traveling on I-684 at highway speed, my 2023 Chevrolet Tahoe with 43,000 miles suddenly shut off without warning and automatically shifted into neutral. I had a complete loss of propulsion. As a car guy who has been following the GM 6.2L engine recall issue, I suspected it could be that. I was traveling in the left lane and had to carefully coast across active lanes of traffic to reach the shoulder. My wife and two young children were in the vehicle, and the sudden loss of propulsion created a significant risk of collision. There were no warning illuminations, messages, or other symptoms that I observed prior to the failure. The vehicle was subsequently towed to my Chevrolet dealer for diagnosis and is available for inspection upon request. As confirmed by the dealer, the engine completely seized causing the loss of propulsion. I will also share, about 1 year ago after the GM recall was issued, I took my truck back to the dealer. They cleared the engine for the propulsion issue, changed the oil for 0W40 and changed the oil fill cap in line with GM recall standards.

Filed Sep 17, 2026 · Engine · MI

I am submitting this complaint regarding my 2023 Chevrolet Tahoe equipped with the GM 6.2-liter V8 engine. VIN: [XXX]. At approximately 40,000 miles, the original engine experienced a major failure and was completely replaced by a Chevrolet dealership under warranty. I have now driven fewer than 10,000 miles on the replacement engine and am experiencing a very similar engine-related problem again. The vehicle is currently back at the Chevrolet dealership being inspected and repaired. This is extremely concerning because the original engine failed at only approximately 40,000 miles, and the replacement engine has developed a similar problem after fewer than 10,000 miles. The GM 6.2-liter V8 has been the subject of numerous reported engine problems and complaints, and I believe this repeated failure warrants the federal safety agency’s attention. I am concerned there may be an underlying or recurring defect affecting these engines that has not been adequately addressed. I am also concerned about the potential safety implications of an engine or valvetrain failure while driving. An unexpected loss of power or significant mechanical failure could create a dangerous situation, particularly at highway speeds or in traffic. I can provide dealership documentation showing the original engine replacement, the mileage at which it occurred, and the current repair visit. This documentation establishes that the vehicle has experienced significant engine-related problems twice within a relatively short period, including a similar problem with the replacement engine after fewer than 10,000 miles. I respectfully request that the federal safety agency document this complaint and review whether there is a broader pattern of premature or repeated failures involving the GM 6.2-liter V8 used in 2023 Chevrolet Tahoe vehicles and whether further investigation or corrective action is warranted. Replacing the original engine did not resolve the issue, as the replacement engine has now developed a similar problem. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT

Filed Sep 16, 2026 · Engine · 32,295 miles · NC

The contact owns a 2023 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power and was unable to restart. The message "Engine Overheating - Stop Driving Immediately" was displayed. The vehicle was towed to the dealer, who determined that the engine had failed, and the engine was replaced. The manufacturer was notified of the failure by phone. The failure mileage was 32,295.

Filed Sep 14, 2026 · Engine · 82,000 miles · LA

The contact owns a 2023 Chevrolet Tahoe. The contact stated there was a misfire in the engine, with the engine warning light illuminated. The message “Collision Mitigation System Off” was displayed. There was a burning odor coming from the vehicle after the failure. The vehicle started shaking abnormally. The vehicle was taken to the local dealer, where it was diagnosed and determined that the lifter and crankshaft needed to be replaced. The contact purchased a rebuilt engine, and the engine was replaced at another service center. The failure mileage was approximately 82,000.

Filed Aug 28, 2026 · Engine · 22,000 miles · SC

The contact owns a 2023 Chevrolet Tahoe. The contact stated that the vehicle was taken to a dealer, where the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling) remedy was completed with an oil change and oil cap replacement. Approximately three months later, while the contact's wife was driving approximately 45 MPH, the engine stalled. The driver was able to coast to the side of the road. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed. The engine was replaced. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 22,000.