The carmaker dismissed 500 employees in a unit that was critical to its success and seen as important to the future of electric vehicle sales in the United States.
The National Highway Safety Administration also released an analysis of crashes involving the system that showed at least 29 fatal accidents over five and a half years.
The United Automobile Workers reached an agreement involving workers who make Freightliner trucks and Thomas Built buses. The deal comes as the union seeks to expand in Southern states.
The first-quarter results are likely to fuel worries that competitors will continue grabbing a bigger slice of a market dealing with slowing electric car sales.
General Motors has struggled with electric vehicles and in foreign markets but it is selling lots of combustion engine cars and trucks in North America.
This privacy reporter and her husband bought a Chevrolet Bolt in December. Two risk-profiling companies had been getting detailed data about their driving ever since.
Officials are moving to increase enforcement and change laws in response to the rise in counterfeit or expired plates, which exploded during the pandemic.
A federal auto safety agency said the accelerator pedal on the pickup truck, sales of which began in late 2023, could become stuck, increasing the risk of accidents.