Chevy recalling 20 Blazer EVs over a parking brake wiring fault. Fault may trigger brake failure or random engagement while driving. Root issue tied to incorrect part ordered through GM’s own system.
Brake System Problem
A small number of 2024 and 2025 Chevrolet Blazer EV electric vehicles is causing urgent concern due to a defect related to the rear parking brake wiring. This flaw can lead to two dangerous situations: either the brake completely stops functioning, or it engages randomly while driving, both of which create serious safety risks.
Source of the Problem
According to General Motors, the problem originates from repair work related to a previous recall to fix this same fault last summer. During that process, some vehicles received an incorrect replacement part. This confusion arose due to an error in the company’s electronic parts catalog. Although the previous recall required replacing the wiring harness, the system allowed dealers to order a component that did not meet the design specifications.
Technical Implications
GM explains that the incorrect harness is routed differently, which does not provide proper protection for the wires from bending during normal operation. This increases the risk of a short circuit or breakage during everyday driving. If the parking brake engages while the vehicle is moving, it can increase the likelihood of an accident. Conversely, if the brake fails when the car is parked and unattended, it may start rolling. In some cases, drivers may also find they cannot take the car out of park mode.
Recall Scope
The good news for Chevrolet is that this is not a mass recall. It affects only 20 Blazer EV electric vehicles. This number includes 15 units of the 2024 model year, manufactured from July 3, 2023, to March 3, 2024, and five 2025 models assembled from September 11 to October 9, 2024.
Fault Detection and Resolution
The issue came to GM’s attention in mid-October when a brand quality manager filed a report after discovering that the electronic parts catalog allowed dealers to order the incorrect wiring harness. Although the brand is not aware of any accidents related to this defect, it decided to issue a recall. Starting March 9, affected owners will be notified. Dealerships have been instructed to replace the harness with a corrected version that includes an additional protective sheath. This extra layer helps prevent future failures caused by wire bending.
This Blazer EV situation is a telling example of how even well-established quality assurance processes and supply chains can fail at the stage of fixing primary problems. The fact that GM’s own catalog system allowed ordering the wrong part indicates a critical need for double-checking, especially when it comes to safety-critical components like the braking system. The limited scope of the recall certainly minimizes financial and reputational losses for the manufacturer, but the incident itself underscores the importance of flawless logistics and communication between engineers, suppliers, and service centers in the era of complex electric vehicles.