CHEVROLET Complaints

Date: June 22, 2026 Time of Incident: Approximately 11:48 a.m. Vehicle: 2025 Chevrolet Silverado High Country 6.2L V8 Current Mileage: Approximately 29,500 miles I am documenting the events surrounding the unexpected engine failure of my 2025 Chevrolet Silverado High Country. On June 22, 2026, at approximately 11:48 a.m., while driving at highway speed, the vehicle was operating normally with no warning lights, messages, or other indications of a problem. I began hearing a metallic clanking or knocking noise from the engine area. The noise progressively increased in volume and severity over approximately ten minutes as I reduced speed and looked for a safe location to pull over. My intention was to reach the dealership if possible; however, as I slowed to approximately 15 mph to make a turn, the noise stopped abruptly, the engine shut off, and the vehicle displayed a message instructing me to press the Start button again. The vehicle came to a complete stop at approximately 11:58 a.m. I attempted to restart the vehicle once, but it did not restart. No additional restart attempts have been made. There were no warning lights displayed prior to the engine shutting down, and there were no visible fluid leaks underneath the vehicle after it came to a stop. The vehicle received a routine oil change on June 16, 2026, approximately three days before this incident. I have retained the service receipt and all related documentation. The vehicle will be transported by flatbed tow truck to an authorized Chevrolet dealership for diagnosis and repair under warranty. This email is intended to document the incident timeline and details while they are fresh in my memory. I have not heard back from the dealer yet.

Vacuum pump failure causing hard brake pedal which made near to impossible to brake safely and properly that lead to timing chain issues

After 3 years of having this car it’s overheating each summer requiring the coolant system, hoses, thermostat, and water pump to be replaced each summer. As well as major oil leaking after full tune ups.

Oil cooler failed and truck was at dealer for a month over winter. Now June 20th transmission failed and there is no timeframe on the valve body. I am still making payments on this truck and no dealers have a timeframe.

My 2021 Chevrolet Silverado RST 4x4 5.3L V8 was a Certified Pre-Owned vehicle purchased through a GMC dealership, strictly maintained by certified GMC service departments, and had its torque converter replaced one year prior in accordance with a manufacturer Technical Service Bulletin (TSB). One week before a scheduled round-trip journey from Alabama to North Carolina, the truck underwent a comprehensive multi-point inspection, oil change, and tire rotation at an authorized Chevrolet dealership. While driving on the highway, I came to a complete stop due to an accident ahead, but when traffic resumed a forward-moving pace, the drivetrain completely lost the ability to propel the vehicle without any prior warning signs or symptoms of mechanical failure. While immobilized and contacting 911 and towing services, I attempted to cycle through all drive modes—including Auto, 4-High, 4-Low, and 2WD—but none succeeded in transferring power to the wheels; though the engine would still rev, no power reached the tires. No dashboard warning lights illuminated prior to the drivetrain failure, though a check engine light did appear after the vehicle became immobile when I was switching through drive modes. Because there was no available highway shoulder or exit to seek safety, and due to the sudden nature of the mechanical failure, emergency vehicles and tow trucks could not safely divert traffic or move the vehicle in time, resulting in a severe rear-end collision that caused a total loss. The vehicle has not yet undergone a mechanical inspection, but it is currently under a 60-day hold for examination by insurance adjusters and legal counsel, and it remains available for a formal teardown upon request.

I’ve owned this vehicle since new, and I’ve asked the dealership twice as well as contacted GM/OnStar customer relations. At speeds above roughly 65 mph, the interior turn signal indicator sound can’t be heard. I end up driving until the “turn signal left on” alert goes off, which is loud enough to notice. Since the sound comes from the audio system, I don’t see any way to change it through settings or aftermarket options. One of the safty issues is on crowded highways other driver attempt to get into my lane thinking I am about to change lanes again.

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed and shifting into a lower gear, the vehicle was jerking with an audible sound coming from the vehicle. The vehicle was taken to an independent mechanic; however, the diagnostic result was not available. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 180,000.

The rear camera view is skewed resulting in inaccurate reference angles of the vehicle. When used to assist in reversing results in improper placement of vehicle and can cause collision of vehicle with objects.

Vehicle infotainment system on 2023 Chevrolet Bolt completely stopped functioning in May of May of 2026. Screen/radio/bluetooth and associated components had no functionality, including backup camera, safety warning features, etc. Dealership confirmed that the system needed replacement entirely and was non-functional. Vehicle was not inspected by any other parties but it was confirmed by the dealership that this is a "common issue" for Chevrolet vehicles, even newer models. There were no warnings prior to the issue - the system simply did not work one day and never functioned again.

Engine Cooling System (Thermostat Housing / Water Outlet) The vehicle suffered a premature structural failure of the factory engine coolant thermostat housing. The component, which is manufactured from a fragile plastic composite, cracked completely open without warning, causing an immediate, rapid loss of engine coolant. This constitutes a severe safety hazard. A sudden, catastrophic loss of engine coolant under normal driving conditions puts the vehicle at immediate risk of severe engine overheating and sudden engine stalling or seizure while in motion. If the engine stalls unexpectedly in high-speed traffic, it strips the driver of power steering and braking assistance, drastically increasing the risk of a serious collision. General Motors is fully aware of this pervasive material defect across the Chevy Sonic model years, yet they refuse to issue a safety recall, forcing owners to operate vehicles with inherently flawed, dangerous plastic cooling components. They also refuse to help in getting the vehicle repaired or share the cost.