2026 CHEVROLET SILVERADO EV — Complaint #2121709
Open-data reference.
NHTSA Complaint about FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL:SOFTWARE filed August 18, 2025
NHTSA complaint #2121709 (ODI reference 11681434) concerns a 2026 CHEVROLET SILVERADO EV and was filed on August 18, 2025. The owner reports the failure occurred on August 4, 2025. The vehicle had 700 miles on the odometer at the time of the incident. The report was geocoded to Oklahoma based on the filer's self-reported location. The affected component is categorized as forward collision avoidance: adaptive cruise control:software, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.
The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.
Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same CHEVROLET SILVERADO EV cohort independently describe similar forward collision avoidance: adaptive cruise control:software failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2026 CHEVROLET SILVERADO EV shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
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 w
Complaint Details
| NHTSA Complaint ID | 2121709 |
| ODI Number | 11681434 |
| Date Filed | August 18, 2025 |
| Failure Date | August 4, 2025 |
| VIN | 1GC403ED4TU |
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.