Wendi Kunkel points out the key in the ignition on her 2010 Chevy Cobalt in Rockwall, Texas, in April. GM recalled millions of cars over a flaw in ignition switches that could cause the vehicles to shut off unexpectedly. LM Otero/AP hide caption

itoggle caption LM Otero/AP

A Ford Motor assembly employee works on a 2013 Ford C-MAX Hybrid vehicle at the Michigan Assembly Plant in Wayne, Mich., on Nov. 8, 2012. Rebecca Cook/Reuters /Landov hide caption

itoggle caption Rebecca Cook/Reuters /Landov

A Chevrolet logo on the grill of a 2013 Traverse at the 2013 Pittsburgh Auto Show. General Motors is recalling more than 1.5 million vehicles, including SUVs, vans and Cadillacs, for defective ignition switches and other problems. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

Laura Christian, far right, talks about how her birth daughter Amber Marie Rose was killed on July 29, 2005, in a car crash that investigators determined was linked to a defective ignition switch. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Mayor Rob Ford talks during a City Council debate in Toronto on Nov. 13. Nathan Denette/AP hide caption

itoggle caption Nathan Denette/AP