(L-R) General Motors CEO Mary Barra, United Auto Workers Union President Dennis Williams, UAW Vice President and Director UAW GM Department Cindy Estrada and GM North America vice president of Manufacturing and Labor Relations Cathy Clegg pose with the GM UAW negotiating team during a press event officially beginning 2015 contract negotiations at the UAW-GM Center Human Resources in Detroit, Michigan

General Motors CEO Mary Barra (L) reaches in front of United Auto Workers Union President Dennis Williams and shakes hands with UAW Vice President and Director UAW GM Department Cindy /Estrada as GM North America vice president of Manufacturing and Labor Relations Cathy Clegg watches during a press event officially beginning 2015 contract negotiations at the UAW-GM Center Human Resources in Detroit, Michigan

(L-R) General Motors CEO Mary Barra shakes hands with United Auto Workers Union President Dennis Williams as UAW Vice President and Director UAW GM Department Cindy Estrada shakes hands with GM North America vice president of Manufacturing and Labor Relations Cathy Clegg during a press event officially beginning 2015 contract negotiations at the UAW-GM Center Human Resources in Detroit, Michigan

(L-R) General Motors CEO Mary Barra, United Auto Workers Union President Dennis Williams, UAW Vice President and Director UAW GM Department Cindy Estrada and GM North America vice president of Manufacturing and Labor Relations Cathy Clegg pose with the GM UAW negotiating team during a press event officially beginning 2015 contract negotiations at the UAW-GM Center Human Resources in Detroit, Michigan