2026 CHEVROLET SILVERADO EV

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

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

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

The contact owns a 2026 Chevrolet Silverado EV. The contact stated that while driving at an undisclosed speed and towing, the adaptive cruise control set speed independently decreased. No warning lights were illuminated. The adaptive cruise control was set at 65 MPH, and the adaptive cruise control independently reset to 42 MPH. In addition, on another occasion, the adaptive speed control was set at 65 MPH, however the adaptive cruise control independently reset to 80 MPH. The contact stated that the adaptive cruise control and the failure ceased; however, the failure reoccurred. The contact stated that the failure almost caused the vehicle to be rear-ended. The contact stated that the failure had occurred several times and usually at night. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The vehicle was scheduled for a diagnostic test. The manufacturer was not made aware of the failure. The failure mileage was approximately 700.