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General Motors CEO Mary Barra prepares to testify before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" April 11, 2014 on Capitol Hill in Washington, DC. The panel is investigating a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Allison Shelley/Getty Images) ( 481859163 )

Family members place the pictures of Richard Bailey (L), Sarah Trautwein (2nd L), Joshua Wooten (R), as well as other victims of the car accidents, on the committee wall as General Motors CEO Mary Barra testifies before the House Energy and Commerce Committee for a hearing on the GM ignition switch recall on Capitol Hill in Washington, DC, April 1, 2014. (JIM WATSON/AFP/Getty Images) ( 528567454 )

General Motors Company CEO Mary Barra speaks to the media after appearing before the House Energy and Commerce Committee, on Capitol Hill, on April 1, 2014 in Washington, DC. The committee is heard testimony on the General Motors ignition switch recall, and why it took so long to recall. (Photo by Mark Wilson/Getty Images) ( 481876783 )

US Senator Edward Markey (R), D-Massachusetts, holds up a faulty General Motors ignition switch during a press conference with the family members of deceased drivers on Capitol Hill in Washington, DC, April 1, 2014, ahead of a House Energy and Commerce Committee hearing with the General Motors CEO. General Motors Chief Executive Mary Barra faces tough questioning in Congress on Tuesday over why the company ignored a faulty ignition problem for a decade despite numerous accident reports and 13 deaths. Also in the dock will be the US auto safety agency, the National Highway Traffic Safety Administration (NHTSA), under attack for not acting on its own evidence that the ignitions posed dangerous risks to drivers. (JIM WATSON/AFP/Getty Images) ( 528562702 )

Rosie Cortinas, center, holds a photo of her son Amador Cortinas of Homedale, Idaho, who was killed on Oct. 18, 2013, while driving a friend home in a Chevy Cobalt, joins other families whose loved ones died behind the wheel of defective General Motors vehicles plagued by a defective ignition switch linked to 13 deaths and dozens of crashes, during a news conference on Capitol Hill in Washington, Tuesday, April 1, 2014. The House Energy and Commerce Subcommittee on Oversight and Investigations will look for answers today from GM CEO Mary Barra about a faulty ignition switch and mishandled recall of 2.6 million cars that’s been linked to 13 deaths and dozens of crashes. At far right is Rep. Diana DeGette, D-Colo., the ranking member of that subcommittee. (AP Photo/J. Scott Applewhite) ( General Motors Recall Congress )

Daryl Chansuthus, mother of Hasaya, who died in the crash of a 2006 Chevy Cobalt, listens during a press conference with the family members of deceased drivers on Capitol Hill in Washington, DC, April 1, 2014. General Motors Chief Executive Mary Barra faces tough questioning in Congress on Tuesday over why the company ignored a faulty ignition problem for a decade despite numerous accident reports and 13 deaths. Also in the dock will be the US auto safety agency, the National Highway Traffic Safety Administration (NHTSA), under attack for not acting on its own evidence that the ignitions posed dangerous risks to drivers. (JIM WATSON/AFP/Getty Images) ( 528563582 )

Cherie Sharkey, left, weeps for her son Michael Sharkey who died in his used 2006 Chevy Cobalt in Dresden, NY, as she walks with Laura Christian, of Harwood, Md., birth mother of Amber Marie Rose, the first reported victim of the General Motors safety defect, on Capitol Hill in Washington, Tuesday, April 1, 2014, to represent their children at a news conference. The House Energy and Commerce Subcommittee on Oversight and Investigations will look for answers today from GM CEO Mary Barra about a faulty ignition switch and mishandled recall of 2.6 million cars that’s been linked to 13 deaths and dozens of crashes. (AP Photo/J. Scott Applewhite) ( General Motors Recall Congress )

Sen. Ed Markey (D-MA) holds a GM ignition switch during a news conference at the U.S. Capitol, on April 1, 2014 in Washington, DC. The families want to know why it took GM so long to recall the faulty ignition switch on certain models.. (Photo by Mark Wilson/Getty Images) ( 481845845 )

House Oversight and Investigations subcommittee Chairman Rep. Tim Murphy, R-Pa., watches at left as the subcommittee's ranking member, Rep. Diana DeGette, D-Colo. holds up a GM ignition switch, on Capitol Hill in Washington, Tuesday, April 1, 2014, as General Motors CEO Mary Barra testified before the committee. The committee is looking for answers from Barra about safety defects and mishandled recall of 2.6 million small cars with a faulty ignition switch that's been linked to 13 deaths and dozen of crashes. (AP Photo/J. Scott Applewhite) ( General Motors Recall Congress )

A sign belies a full hearing room as General Motors CEO Mary Barra testifies before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" on Capitol Hill April 1, 2014 on Capitol Hill in Washington, DC. The committee is hearing testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Allison Shelley/Getty Images) ( 481864989 )

General Motors Company CEO Mary Barra stands with others from her entourage as she speaks to the media after testifying during a House Energy and Commerce Committee hearing on Capitol Hill, on April 1, 2014 in Washington, DC. The committee heard testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Mark Wilson/Getty Images) ( 481873851 )

Mary Theresa Ruddy holds a photo of her daughter Kelly Erin Ruddy, who was 21 when she died in a car accident in 2010 involving her 2005 Chevy Cobalt, as General Motors CEO Mary Barra testifies before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" on Capitol Hill April 1, 2014 on Capitol Hill in Washington, DC. The committee is hearing testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Allison Shelley/Getty Images) ( 481864995 )

Congressional and GM staff watch from the front row as General Motors CEO Mary Barra testifies before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" on Capitol Hill April 1, 2014 in Washington, DC. The committee is hearing testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Allison Shelley/Getty Images) ( 481876415 )

General Motors CEO Mary Barra testifies before the House Energy and Commerce Committee for a hearing on the GM ignition switch recall on Capitol Hill in Washington, DC, April 1, 2014. Relatives of car crash victims and lawmakers demanded accountability from embattled US automaker GM Tuesday as its CEO prepared to face Congress, amid claims that a $2 fix could have saved lives. (JIM WATSON/AFP/Getty Images) ( 528567942 )

Photos of accident victims involving GM cars line the back wall of the hearing room as General Motors CEO Mary Barra testifies before the full House Energy and Commerce hearing room in a hearing entitled "The GM Ignition Switch Recall: Why Did It Take So Long?" on Capitol Hill April 1, 2014 on Capitol Hill in Washington, DC. The committee is hearing testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Allison Shelley/Getty Images) ( 481864999 )

Chairman of the House Energy and Commerce Committee Congressman Tim Murphy, R-PA, listens to testimony from General Motors CEO during a hearing on the GM ignition switch recall on Capitol Hill in Washington, DC, April 1, 2014. (JIM WATSON/AFP/Getty Images) ( 528567832 )

General Motors Company CEO Mary Barra testifies during a House Energy and Commerce Committee hearing on Capitol Hill, on April 1, 2014 in Washington, DC. The committee is hearing testimony on a safety defect that's been linked to at least 13 deaths and has sparked a 2.6 million-vehicle recall. (Photo by Mark Wilson/Getty Images) ( 481864827 )