The U.S. National Highway Traffic Safety Administration (NHTSA) is investigating complaints of brake assist loss in 3,322 General Motors Company (NYSE:GM) Cadillac Lyriq EVs from the 2023 production year. Reports indicate issues with a firm brake pedal and a 'Brake System Failure' notification. GM identified the cause as a potential fracture in the electronic brake control module's internal spindle during ABS events. GM plans to address this issue with an over-the-air update for affected vehicles. GM shares rose 0.33% to $43.22 following the news.