The National Highway Traffic Safety Administration (NHTSA) has upgraded its investigation into brake problems affecting General Motors' electric vehicles, citing multiple complaints including a harrowing incident involving a 2024 Chevrolet Blazer EV. According to documents released by the agency, the driver reported that the vehicle's brakes failed entirely, leaving them with no choice but to "deliberately steer the vehicle into a concrete curb" to slow down and avoid a "catastrophic intersection collision."

The investigation, which began as a preliminary review, has been elevated to an engineering analysis—the most intensive phase before a potential recall. NHTSA's action covers an estimated 47,000 vehicles, including the Blazer EV, Cadillac Lyriq, and GMC Hummer EV, model years 2022-2025. The agency has received at least 14 complaints of brake failure, with some drivers reporting a sudden loss of braking power at low speeds.

GM has acknowledged the issue in a statement, saying it is "fully cooperating with NHTSA" and has already issued a software update to address what the company describes as a "rare condition" that can cause the antilock braking system (ABS) to engage unexpectedly, reducing stopping power. However, some drivers report the problem persisted after the update.

The Blazer EV driver's account is particularly alarming: the incident occurred in heavy traffic when their brake pedal became "rock hard" and unresponsive. After managing to steer into a curb, the vehicle came to a stop but left the driver shaken. The National Highway Traffic Safety Administration is now analyzing whether GM's fix adequately addresses the root cause, or if a hardware recall is necessary.

This is not the first time GM's electric vehicles have faced scrutiny. The automaker has previously recalled the Bolt EV over battery fire risks and has grappled with quality control challenges as it transitions to an all-electric future. The current investigation could have significant implications for GM's reputation and its ambitious EV rollout plans.

Industry analysts note that brake-by-wire systems, which rely on electronic signals rather than hydraulic pressure, are increasingly common in EVs but introduce new failure modes. If NHTSA determines that GM's design is flawed, it could force a costly recall and undermine consumer confidence in the company's electric lineup.

GM has not issued a formal recall at this time, but NHTSA has warned consumers who experience brake failure to contact the agency and dealerships immediately. The investigation is ongoing.