UPDATE | Barra discusses what GM is doing now

Perhaps Barra’s most-confident answer of the hearing came when she was asked what changes the company has implemented since its restructuring.

She pointed to a mix of outside hires and individuals with experience at the company, a streamlined department of global production development, new values and a revamped process for ensuring the quality of products.

“Systematically, we’ve gone across the company and made changes,” she said.