Categories Articles GM’s Mary Barra shares Warren Buffett’s ‘phenomenal advice’ to her Post author By crystalg Post date September 10, 2026 Business Insider Business Insider Tags Advice, Barra, Buffett's, GM's, Mary, Phenomenal, Shares, Warren ← Why Community Colleges Are Making a Comeback → Ancient Teeth Trace One Of Humanity’s Oldest Drug Habits To The Ice Age