2026 Chevrolet Silverado 1500: sudden loss of power

Filed Nov 2, 2026 · Electrical, Engine · MI

While driving home from work, I pulled up to the stop sign at the end of the exit ramp. When I released the brake and pressed the gas pedal, my truck would not move. This immediately put me in an anxious state as I was expecting the vehicle to move. I checked my rearview mirror to make sure that there wasn’t anybody coming up behind me and put my flashers on while I tried to figure out what was going on. My eyes moved to the shifter next. I noticed that the vehicle was in park. I reached down to the shifter and tried to put the vehicle in drive, but it would not shift. I then hit the push-to-start button to restart the vehicle. After this, I was able to shift back into drive and finish my commute home. This was an unsafe condition as I experienced an unexpected loss of power. An approaching vehicle would expect me to be moving when the road is clear in front of me. I took the truck to the dealership the next day. My vehicle was repaired under warranty. The cause states "update 2810275 Serial Data Gateway Module Reprogramming with SPS." I did not notice any warning lamps or messages, but I also did not look at the instrument panel when this happened. My first thought was to check for approaching vehicle traffic and to put on my flashers. After I put on my flashers, I looked down and noticed the vehicle was in park.

Filed Oct 19, 2026 · Brakes, Engine · FL

My 2026 Chevrolet Silverado 1500 Trail Boss, equipped with the 5.3L V8 engine and 10-speed automatic transmission, intermittently experiences a complete engine stall while the vehicle is still moving. This condition typically occurs following an extended period of driving, during braking and deceleration at approximately 1 to 5 mph. The vehicle locks the emergency brake and the engine stops. This happened in stop/go traffic as well as in my neighborhood. As the vehicle approaches a complete stop, the engine begins to struggle, with noticeable hesitation and a reduction in engine RPM, before shutting off completely. When the engine stalls, the transmission automatically shifts into Neutral, requiring me to restart the engine before I can resume driving. This is not normal automatic engine start/stop operation. The issue occurs even when the automatic start/stop feature has been manually disabled. The engine shuts down unexpectedly without driver input or an intentional shutdown command. The intermittent nature of this malfunction makes it difficult to predict when the vehicle will stall. The unexpected loss of engine power while the vehicle is moving creates a significant safety concern, particularly when braking, turning, entering intersections, or maneuvering in traffic. The vehicle could become temporarily disabled in an active roadway, increasing the risk of a collision. I have identified reports from other owners of 2026 Chevrolet Silverado 1500 vehicles describing similar unexpected engine shutdowns during low-speed operation, including instances where the transmission shifts into Neutral and requires an engine restart. The cause of this malfunction has not been determined. I am requesting that the federal safety agency investigate whether this condition represents a broader safety defect affecting 2026 Chevrolet Silverado 1500 vehicles equipped with the 5.3L V8 engine. I am concerned this could happen on the highway or cause an accident. Dealer cannot replicate...

Filed Oct 6, 2026 · Electrical, Engine · MS

I am reporting a safety concern involving my 2026 Chevrolet Silverado 1500 High Country equipped with the 6.2L V8 engine. I purchased the vehicle new on August 3, 2026. The engine has unexpectedly shut off on two separate occasions while the vehicle was still moving at low speed. The first incident occurred within approximately the first week of ownership, when the truck had less than approximately 1,000 miles on it. I was slowly driving through the parking lot at McB’s when the engine unexpectedly shut off while the vehicle was still moving. The instrument panel displayed “Press Brake to Start.” The engine did not automatically restart, and I had to stop the vehicle and manually restart the engine. The second incident occurred on September 18, 2026, while I was slowly driving through a parking garage. Again, the vehicle was still moving when the engine unexpectedly shut off. The instrument panel displayed the same “Press Brake to Start” message. The engine did not automatically restart, and I again had to manually restart the vehicle. I have a video recording of this incident. This vehicle is equipped with automatic engine Stop/Start. During normal Stop/Start operation, “AUTO STOP” is indicated on the instrument panel when the system shuts the engine off. During neither of these two incidents did the instrument panel indicate “AUTO STOP.” Instead, the engine unexpectedly shut off while the vehicle was moving, displayed “Press Brake to Start,” and required a manual restart. Both incidents occurred while maneuvering at low speed in parking areas. I am concerned that the same failure could occur at a higher speed, while entering or crossing traffic, or in another situation where an unexpected loss of engine power could cause a collision. The vehicle has also experienced intermittent electrical/electronic issues, including radio interruptions, remote-start problems, a “Key Not Detected” message, memory-seat/seat-recall problems, and an intermittent power running-

Filed Oct 6, 2026 · Engine · TN

The 2026 Chevy 1500 Silverado 6.2L engine had a slight knocking sound from the date I purchased it brand new in march 2026. I was driving home on a evening in July 2026 and the truck began to squeak, knock very loudly and shake violently. The truck then locked up and completely shut off while I was driving 45 mph down the highway. The vehicle had approximately 3,000 miles on it when the incident occurred. The truck’s violent shaking and sudden loss of power while traveling 45 mph created an immediate risk in which I did not have control of the vehicle and could have caused me to be unable to safely maneuver out of traffic. Thank God there was light traffic at the time and also a wide empty parking lot straight ahead of me when the truck shut down. The incident also placed other drivers in danger of colliding with my disabled vehicle or taking sudden evasive action that could cause an accident. I had it towed directly to the dealership service department and according to their report, "found catastrophic internal engine failure."

Filed Sep 30, 2026 · Electrical, Engine · AZ

Multiple instances of engine shutting off while driving and switches to "Park". Most recently the truck suddenly lost power, shut off, stopped immediately, went into Park, jerked extremely hard, and displayed the message “Service Transmission.”

Filed Sep 3, 2026 · Engine, Transmission · AR

I am submitting this formal statement regarding a severe, recurring safety hazard involving sudden engine stalling and internal mechanical noise on my 2026 Chevrolet Silverado 1500.The vehicle has experienced multiple sudden engine stalls during low-speed deceleration, specifically while letting off the accelerator pedal to execute low-speed turns into parking lots. When the stall occurs, the engine dies completely, causing an immediate and dangerous loss of power steering and power braking assistance mid-turn. Because the vehicle shuts off completely while still in motion, I am forced to bring the truck to a dead stop, shift the transmission out of Drive and into Park, and completely cycle the ignition system to restart the engine.There is a distinct, audible mechanical ticking sound coming from the engine compartment during operation. Crucially, the vehicle has never illuminated a Check Engine Light, displayed a dashboard warning message, or given any advance electronic indication prior to or during these sudden stalling events.This vehicle's build window falls directly into the scope of the federal safety agency’s (the federal safety agency) active Engineering Analysis (EA26005) investigating catastrophic valvetrain and engine failures on GM 6.2L L87 engines. Because this defect causes an unexpected loss of vehicle control with zero diagnostic warnings, it poses an immediate highway safety risk to myself and others.I request a full diagnostic scan for hidden or pending fault codes, a physical inspection of the valvetrain/Dynamic Fuel Management (DFM) system, and an inspection of the engine oil filter for metallic debris indicative of internal bearing degradation.

Filed Sep 3, 2026 · Engine, Transmission · AR

I am submitting this formal statement regarding a severe, recurring safety hazard involving sudden engine stalling and internal mechanical noise on my 2026 Chevrolet Silverado 1500.The vehicle has experienced multiple sudden engine stalls during low-speed deceleration, specifically while letting off the accelerator pedal to execute low-speed turns into parking lots. When the stall occurs, the engine dies completely, causing an immediate and dangerous loss of power steering and power braking assistance mid-turn. Because the vehicle shuts off completely while still in motion, I am forced to bring the truck to a dead stop, shift the transmission out of Drive and into Park, and completely cycle the ignition system to restart the engine.There is a distinct, audible mechanical ticking sound coming from the engine compartment during operation. Crucially, the vehicle has never illuminated a Check Engine Light, displayed a dashboard warning message, or given any advance electronic indication prior to or during these sudden stalling events.This vehicle's build window falls directly into the scope of the federal safety agency’s (the federal safety agency) active Engineering Analysis (EA26005) investigating catastrophic valvetrain and engine failures on GM 6.2L L87 engines. Because this defect causes an unexpected loss of vehicle control with zero diagnostic warnings, it poses an immediate highway safety risk to myself and others.I request a full diagnostic scan for hidden or pending fault codes, a physical inspection of the valvetrain/Dynamic Fuel Management (DFM) system, and an inspection of the engine oil filter for metallic debris indicative of internal bearing degradation.

Filed Sep 1, 2026 · Engine · WY

In Late December 2025, with only 764 miles on my 2026 Chev truck, we were driving south on [XXX] down the interstate in Utah. The engine lost power, service enging light soon came on, and the truck came to a stop in about a mile. There were 5 of us in the truck. Late night, in a strange town. We had to take a UBER to the motel. The truck was towed to Murdock Chevrolet in Woods Cross, Ut. They gave us a lowner car, and they took the engine out, and sent it to GM. GM took the engine apart, and said verably that a crankshaft bearing went bad, and they sent a new one. Within 30 days, I had my truck back. I asked for paperwork on the repairs, and was told GM would not give me anything. All I got was my truck. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 21, 2026 · Engine · CO

On or about XXX the engine in my 2026 Chevrolet Silverado quit running so I had it towed to Daniels Long Chevrolet in [XXX] where I had purchased it new on or about XXX. My truck was bought with the 6.2 L V8 engine, and it had approximately 8,627 miles on it when the engine had quit running on XXX. The first oil change on the truck was performed at approximately 5,000 miles at Daniels Long Chevrolet with the prescribed oil. There was no warning when the engine quit running other than the engine running rough and having a loss of power about two blocks from my house. I then had the truck towed to Daniels Long Chevrolet for repairs. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 4, 2026 · Engine · CO

The engine in my 2026 Chevrolet Silverado ZR2 with the 6.2L V8 had a catastrophic failure. While I was driving, the engine suddenly shut off and seized without any warning. The dealer told me they found metal in the engine oil and oil filter and that the engine needs to be replaced. They also informed me the replacement engine is on back order for more than five weeks. The truck is available for inspection. How was your safety or the safety of others put at risk? My truck lost all power while I was driving, which put me and other drivers at risk because it happened without warning. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The dealer inspected the truck and confirmed the engine had an internal failure. They found metal in the engine oil and oil filter and said the engine must be replaced. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The truck has been inspected by the dealer. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? No. There were no warning lights, messages, or other signs of a problem before the engine failed.

Filed Jul 20, 2026 · Engine · NY

At approximately 3,000 miles, the engine began making a loud knocking noise that became progressively worse while driving. The truck was diagnosed as needing a complete engine replacement. No warning lights, no check engine light, nothing. For someone inexperienced with vehicles, you could easily be in big trouble on the highway and a potentially life threatening situation. My primary concern is that there was no warning that such a major engine failure was about to occur. An engine that fails with so few miles raises concerns about the possibility of sudden loss of power, loss of acceleration, or engine seizure while driving in traffic, on highways, or while towing. A failure under those conditions could significantly increase the risk of a crash. The vehicle has been out of service while I continue making loan and insurance payments on a brand-new truck that I cannot use. The replacement engine is on national backorder, leaving me without a clear repair timeline. After researching this issue, I found numerous reports from other owners describing similar failures involving the 6.2L V8 engine. Based on the volume of owner complaints, there appears to have been a significant increase in reported engine failures involving 2026 model-year vehicles. This suggests the problem may not be an isolated incident but instead could indicate a broader defect that deserves investigation. As a result of this experience, I no longer feel confident or safe driving this vehicle, even if the engine is replaced. I purchased a brand-new truck expecting long-term reliability and peace of mind, but instead I experienced catastrophic engine failure at only 3,000 miles. I respectfully request that the federal safety agency investigate these engine failures to determine whether a safety-related defect exists and whether further action is necessary to protect consumers. I have requested a buyback, but GM completely denies it. Such a horrible Expy with manufacture.

Filed Jul 17, 2026 · Electrical, Engine · NY

I have been having issues with my vehicle for the last 1,000 miles or so where it appears to be losing power while accelerating normally, i'm not sure if the issue lies with the engine or powertrain/transmission. I took to dealer last week and they were unable to reproduce. The issues have been getting more frequent and intially were only occuring after the vehicle warmed up, now it has started while vehicle is cold. Feels like the power drops (rpms drop) during a normal acceleration. As of 7/16 I now have a check engine light on, onstar indicates an issue with my engine, transmission, electrical. This is putting myself at safety risk along with others as during my normal drive the engine is losing power and could either leave me stranded or cause an accident.