GM is quietly becoming a subscriptions company

Mary Barra, GM's CEO, boasted significant gains in the company's subscription base. FREDERIC J. BROWN/AFP via Getty Images GM said OnStar generated about $800 million in revenue in the second quarter. It sells two software systems: autonomous driving with Super Cruise and safety features with OnStar. GM told Business Insider it plans to add features through updates over time, reducing the need for new car parts. General Motors has been pulling a Tim Cook and boosting its software and…