CHEVROLET Complaints

NHTSA SAFETY COMPLAINT – HIGH-VOLTAGE BATTERY FAULT & LOSS OF VEHICLE CONTROL Vehicle: chevy Silverado EV LT Mileage at most recent incident: ~5,400+ miles Incident date: December 17, 2025 Description of the Problem This is the third occurrence of a high-voltage battery fault warning, and the second time involving active vehicle malfunction while driving.    •   First occurrence: ~700 miles then at 1040 miles       •   High-voltage battery warning displayed       •   Vehicle taken to dealer and returned the same day       •   No noticeable drivability issues at that time    •   Second occurrence: ~5,400 miles       •   Severe malfunction while driving at highway speed       •   Vehicle towed to dealer       •   Dealer initially reported no active codes until video evidence was provided    •   Third occurrence: 12/17/2025       •   High-voltage battery fault warning displayed again       •   Infotainment and vehicle control screen began glitching again Detailed Description of the Most Severe Incident During the second occurrence, while driving approximately 70–75 mph on the highway in heavy traffic, the following occurred without driver input:    •   The main display screen began glitching and cycling uncontrollably    •   One-pedal driving mode activated by itself making the vehicle slow down abruptly ( another vehicle switched lanes to avoid collision )    •   Climate control systems turned on and off (A/C and heat)    •   Tow mode, stability control, and seat heating activated without input    •   Vehicle behavior changed unexpectedly at highway speeds This created a dangerous and unsafe driving condition. I was able to maneuver the vehicle to the shoulder and exit the highway. Inability to Power Down Vehicle

While driving at a speed of approximately 55 MPH, the vehicle suddenly displayed a flashing check engine light, ESC error light and stability control warning light on the driver cluster. The vehicle made a loud series of noises and suddenly lost power. The loss of power reduced my ability to control the vehicles acceleration while in traffic creating an immediate traffic hazard. Garage recovered vehicle by tow and found lifter failure, camshaft and cam bearing damage with significant metal shavings throughout engine requiring engine replacement. Repair is estimated at $12,000

I have three check engine codes P0340 Camshaft Position Sensor A Circuit (Bank 1 or single sensor) P0341 Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or single sensor) P0016 Crankshaft Position - Camshaft Position Correlation - Bank 1 Sensor A The last one is the same code that’s involved in the L 87 recall that my vehicle is three months shy of I have a 2021 Silverado trail bus 6.2 L that was manufactured in December 2020 I have very rough idol delayed throttle response in multiple camshaft codes that correlate with the crankshaft symptoms of the L 87 recall

2025 Traverse ABS brake system failed, and master cylinder broke at 12K. All of the safety features, Lane Departure, Forward Crash detection, blind spot, automatic braking system all stop working with no signs that it was failing! Extremely unsafe! Traverse are meant to be family vehicles, well with major functions failures this kind of problem is going be recipe for disaster if not recalled ASAP.

On January 28, 2023, my Chevrolet Silverado was involved in a significant multi-impact collision. At the time of the accident, I was a front-seat passenger and my vehicle was fully stopped when it was struck from behind at high speed by a Dodge 2500. The force of the rear impact pushed my truck into the vehicle in front of us, resulting in a secondary front-end collision. This sequence occurred twice. During the collision, the front passenger-side airbag did not deploy, and the front passenger seatbelt failed to lock. As a result, I was thrown violently within the passenger side of the vehicle and struck my head on the dashboard. In contrast, the driver’s seatbelt locked properly, as did the rear seatbelt where my child was seated. Due to the failure of the passenger-side seatbelt to lock, I sustained a severe concussion, a black eye, and other injuries. The vehicle was subsequently inspected by my insurance company. When sheriff’s deputies and state police arrived at the scene, they expressed concern and surprise that the passenger seatbelt did not lock and that no airbags deployed despite the severity of the collision. Shortly after the accident, I contacted GMC regarding these safety concerns. GMC retrieved the vehicle’s Crash Data Recorder (CDR) and conducted an investigation. I was later informed that GMC found no defects or issues with their products. Nearly three years have passed since the accident, and I remain deeply concerned and dissatisfied with GMC’s conclusion. The passenger-side seatbelt did not function as designed, while the driver and rear seatbelts did, and no airbags deployed. I do not believe adequate accountability or explanation was provided regarding the apparent failure of the passenger-side restraint system. Given the force of the impact, I could have been ejected through the windshield.

The contact owns a 2016 Chevrolet Malibu. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate. In addition, the vehicle occasionally accelerated independently. The contact stated that several unknown warning lights were illuminated, and the engine seized. The contact stated that the vehicle was jump-started daily, and the unknown warning lights turned off when the vehicle started. The vehicle was taken to the dealer; however, the failure was not duplicated. The vehicle was taken to several independent mechanics; however, the failure was not duplicated. In addition, the vehicle was taken back to the dealer where the vehicle was purchased; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 90,000.

Telematics Module failure. Vehicle is no longer able to provide GPS location. This is rendered all safety features and OnStar features for accident detection useless. Dealer states parts are on backorder with no ETA. Calls the GM result in no estimated ETA or part availability.

I have replaced the thermostat sensor 3 times because keep getting assist driver assistance disabled throws code p1028 code coolant drops check engine light come on the auto stop quits working

In December 2024, at under 50,000 miles, my 2021 Chevrolet Colorado suffered complete brake failure caused by vacuum pump failure. The vacuum pump failure led to irreparable internal engine damage, requiring complete engine replacement under warranty. Sudden, complete brake failure in traffic could have led to a serious accident causing injuries or death to myself and/or others. The component was inspected by the manufacturer and the service advisor at the dealership stated this was "kind of a known issue on Colorados". There were no warning lamps, messages, or symptoms of the problem prior to the failure. This vacuum pump failure is documented in GM Technical Service Bulletin #21-NA-268, which addresses vacuum pump failures on other GM vehicles. The identical failure mode in my 2021 Colorado demonstrates this is a systemic manufacturing defect, not an isolated incident.

The contact owns a 2000 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal. In addition, the vehicle jerked. The contact stated that the vehicle failed to move while in reverse(R) and only responded while in drive(D). The contact stated that the vehicle stalled while driving. The vehicle was towed to an independent mechanic who diagnosed that an unknown sensor connected to the transmission and engine had failed. The contact bought the sensor, and when the independent mechanic repaired the vehicle, the failure persisted. The independent mechanic then diagnosed that the transmission had failed. The vehicle was repaired. The contact stated that a year later, on a separate occasion, the vehicle failed to start. The contact replaced the battery. The contact stated that afterwards, an abnormal sound was coming from the vehicle. The contact stated that the vehicle failed to function while in reverse(R) or drive(D). There was an abnormal sound coming from the engine. The contact rebuilt the transmission with a friend who was an independent mechanic. The contact stated that the fuel pump was replaced. The contact stated that three years later, the fuel pump failed to function as intended. The contact parked the vehicle, and the vehicle was no longer being driven. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.