2021 CHEVROLET SILVERADO 1500 — Complaint #2158046
Open-data reference.
NHTSA Complaint about EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER filed December 17, 2025
NHTSA complaint #2158046 (ODI reference 11705518) concerns a 2021 CHEVROLET SILVERADO 1500 and was filed on December 17, 2025. The owner reports the failure occurred on November 30, 2025. The vehicle had 100,000 miles on the odometer at the time of the incident. The report was geocoded to Wisconsin based on the filer's self-reported location. The affected component is categorized as equipment:electrical:engine block heater, 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: yes, injuries: 0, fatalities: 0. A complaint that flags a crash, fire, or fatality is escalated on NHTSA's internal review queue and factors more heavily into any Preliminary Evaluation decision on this make and model. 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 1500 cohort independently describe similar equipment:electrical:engine block heater 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 2021 CHEVROLET SILVERADO 1500 shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owned a 2021 Chevrolet Silverado. The contact stated that after plugging in the block heater around 5:15 P.M. while the vehicle was parked unattended in the tool shed, he was notified around 9:45 P.M. that the tool shed and vehicle had caught fire. There were no issues with the vehicle before the failure. There were no reported injuries, airbag deployment, or police report filed. The fire department was able to extinguish the fire. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, and they opened a claim. The insurance company's fire specialist determined that the block heater was faulty and would reach out to the legal team. The vehicle and tool shed were deemed a total loss by the insurance company. The vehicle was still at the contact's residence. The failure mileage was approximately 100,000.
Complaint Details
| NHTSA Complaint ID | 2158046 |
| ODI Number | 11705518 |
| Date Filed | December 17, 2025 |
| Failure Date | November 30, 2025 |
| VIN | 1GC4YPEY7MF |
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.