2023 CHEVROLET TRAILBLAZER — Complaint #2089402
Open-data reference.
NHTSA Complaint about SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER filed May 6, 2025
NHTSA complaint #2089402 (ODI reference 11659160) concerns a 2023 CHEVROLET TRAILBLAZER and was filed on May 6, 2025. The owner reports the failure occurred on April 20, 2025. The vehicle had 25,000 miles on the odometer at the time of the incident. The report was geocoded to Florida based on the filer's self-reported location. The affected component is categorized as service brakes, hydraulic:foundation components:master cylinder, 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 TRAILBLAZER cohort independently describe similar service brakes, hydraulic:foundation components:master cylinder 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 2023 CHEVROLET TRAILBLAZER shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2023 Chevrolet Trailblazer. The contact stated that while driving at undisclosed speeds, the vehicle independently activated the brakes while the accelerator pedal was depressed. In addition, the contact stated that while attempting to make a left turn, the steering wheel independently veered towards the right. The check engine warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed, and the brake master cylinder assembly was replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the same local dealer and was left for further investigation. The manufacturer was not made aware of the failure. The failure mileage was approximately 25,000.
Complaint Details
| NHTSA Complaint ID | 2089402 |
| ODI Number | 11659160 |
| Date Filed | May 6, 2025 |
| Failure Date | April 20, 2025 |
| VIN | KL79MTSL7PB |
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.