2026 Chevrolet Silverado EV Problems

While driving on Interstate 95 in Boynton Beach, Florida at highway speed, the vehicle began stuttering and then lost power brake assist. The instrument cluster displayed Service ESC followed by Brake assist failure, press hard to brake, speed limited. The red BRAKE telltale and the amber ABS telltale illuminated at the same time. The brake pedal became extremely loose and the vehicle did not decelerate as expected when I applied the brakes. The vehicle also derated itself to a 40 mph speed limit while I was still in highway traffic, which created an additional hazard. I was nearly involved in a collision before I was able to bring the vehicle to a stop and get it off the roadway. Odometer read 19,011 miles. I photographed the instrument cluster warnings. The vehicle was towed the same day to an authorized Chevrolet dealer, where it has remained out of service. As of this filing the dealer has performed diagnostics over more than two weeks, has made no repairs to the braking system, and has reported that the condition could not be duplicated. No root cause has been identified. The simultaneous loss of power brake assist, antilock braking, and electronic stability control indicates a single common failure affecting the electronic brake control system rather than three independent faults. Because the failure is intermittent and remains undiagnosed, there is nothing preventing it from recurring. This failure occurred on a high volume interstate at highway speed and could easily have resulted in a fatal crash. I am filing this report so that NHTSA is aware of the condition and can determine whether other Silverado EV vehicles have experienced the same brake control system failure.

What component failed: The “regen on demand” switch broke while using it. Safety: This incident put me, the occupants of my vehicle (my children), and the vehicles around me at risk. Reproduction: There was no need. It is exceptional obvious that the switch is broken and has failed. Inspection: The truck and broken switch were observed by the dealership that services the truck. Warnings: There were no precursors to the failure. Narrative: On Thursday, 7/16/26, I was driving my 2026 Chevrolet Silverado EV. I normally drive in “single pedal drive” mode which provides energy recovery in lieu of mechanical braking. Additionally, I use the “on demand regeneration” for additional slowing and energy recovery. On demand regeneration is somewhere between single pedal drive and mechanical brakes. During this drive I was coming up to stopped traffic and slowing using the regen on demand switch. The switch snapped / broke and the additional slowing / energy recovery stopped instantly. I had to immediately apply the brakes in order to remain a safe distance from the vehicles in front of me. While I am able to safely operate the vehicle without this function, the manner in which the failure occurred is concerning and should be investigated. I am happy to speak with anyone who needs more information.

While driving on Interstate 95 in Boynton Beach, Florida at highway speed, the vehicle began stuttering and then lost power brake assist. The instrument cluster displayed Service ESC followed by Brake assist failure, press hard to brake, speed limited. The red BRAKE telltale and the amber ABS telltale illuminated at the same time. The brake pedal became extremely loose and the vehicle did not decelerate as expected when I applied the brakes. The vehicle also derated itself to a 40 mph speed limit while I was still in highway traffic, which created an additional hazard. I was nearly involved in a collision before I was able to bring the vehicle to a stop and get it off the roadway. Odometer read 19,011 miles. I photographed the instrument cluster warnings. The vehicle was towed the same day to an authorized Chevrolet dealer, where it has remained out of service. As of this filing the dealer has performed diagnostics over more than two weeks, has made no repairs to the braking system, and has reported that the condition could not be duplicated. No root cause has been identified. The simultaneous loss of power brake assist, antilock braking, and electronic stability control indicates a single common failure affecting the electronic brake control system rather than three independent faults. Because the failure is intermittent and remains undiagnosed, there is nothing preventing it from recurring. This failure occurred on a high volume interstate at highway speed and could easily have resulted in a fatal crash. I am filing this report so that NHTSA is aware of the condition and can determine whether other Silverado EV vehicles have experienced the same brake control system failure.

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

What component failed: The “regen on demand” switch broke while using it. Safety: This incident put me, the occupants of my vehicle (my children), and the vehicles around me at risk. Reproduction: There was no need. It is exceptional obvious that the switch is broken and has failed. Inspection: The truck and broken switch were observed by the dealership that services the truck. Warnings: There were no precursors to the failure. Narrative: On Thursday, 7/16/26, I was driving my 2026 Chevrolet Silverado EV. I normally drive in “single pedal drive” mode which provides energy recovery in lieu of mechanical braking. Additionally, I use the “on demand regeneration” for additional slowing and energy recovery. On demand regeneration is somewhere between single pedal drive and mechanical brakes. During this drive I was coming up to stopped traffic and slowing using the regen on demand switch. The switch snapped / broke and the additional slowing / energy recovery stopped instantly. I had to immediately apply the brakes in order to remain a safe distance from the vehicles in front of me. While I am able to safely operate the vehicle without this function, the manner in which the failure occurred is concerning and should be investigated. I am happy to speak with anyone who needs more information.

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

What component failed: The “regen on demand” switch broke while using it. Safety: This incident put me, the occupants of my vehicle (my children), and the vehicles around me at risk. Reproduction: There was no need. It is exceptional obvious that the switch is broken and has failed. Inspection: The truck and broken switch were observed by the dealership that services the truck. Warnings: There were no precursors to the failure. Narrative: On Thursday, 7/16/26, I was driving my 2026 Chevrolet Silverado EV. I normally drive in “single pedal drive” mode which provides energy recovery in lieu of mechanical braking. Additionally, I use the “on demand regeneration” for additional slowing and energy recovery. On demand regeneration is somewhere between single pedal drive and mechanical brakes. During this drive I was coming up to stopped traffic and slowing using the regen on demand switch. The switch snapped / broke and the additional slowing / energy recovery stopped instantly. I had to immediately apply the brakes in order to remain a safe distance from the vehicles in front of me. While I am able to safely operate the vehicle without this function, the manner in which the failure occurred is concerning and should be investigated. I am happy to speak with anyone who needs more information.

2026 Silverado TrailBoss EV Windshield has laminate issues causing waves, distortion, and clarity issues. On several occasions this has caused vertigo/motion sickness while driving on the freeway. Vehicle was taken to Chevy dealership on 4/23 this issue has been confirmed and replacement parts on order. Under bumper to bumper warranty.