General Motors chief executive officer Mary Barra is coming back to Capitol Hill on Wednesday to face more questions from a U.S. House Committee. This time, Barra won’t have to face lawmakers by herself. She will also have the investigator charged with finding out why the automaker fumbled the recall of vehicles with faulty ignition switches.

Barra often referenced the investigation conducted by former U.S. Attorney Anton Valukas during her previous Congressional hearing appearances on April 1 and 2. The resulting 325-page report left quite an impact at GM, including the dismissal of 15 employees.

According to prepared testimony Barra is scheduled to give during the hearing held by the House Energy and Commerce Committee, she said, “The Valukas report, as you now know, is extremely thorough, brutally tough and deeply troubling. It paints a picture of an organization that failed to handle a complex safety issue in a responsible way.

“I was deeply saddened and disturbed as I read the report. For those of us who have dedicated our lives to this company, it is enormously painful to have our shortcomings laid out so vividly,” Barra continued.

Beyond the dismissal of those GM employees, Barra intends to highlight the six other moves the automaker has made in response to the report findings, including an establishment of a compensation fund for families affected.

“I know some of you are wondering about my commitment to solve the deep underlying cultural problems uncovered in this report. The answer is I will not rest until these problems are resolved. As I told our employees, I am not afraid of the truth,” Barra said in her prepared testimony.

“We are a good company, but we can and must be much better. That’s my focus and that's my promise to you, our employees, our customers, our shareholders and the American people,” she went on to say.

Meanwhile, Valukas plans to share how he and his team uncovered a trail of missteps that created the ignition problems in the Chevrolet Cobalt and several other discontinued models.

“The story of the Cobalt is one of a series of individual and organizational failures that led to devastating consequences. Throughout the decade that it took GM to recall the Cobalt, there was a lack of accountability, a lack of urgency and a failure of company personnel charged with ensuring the safety of the company’s vehicles to understand how GM's own cars were designed,” Valukas said in his prepared testimony

“We found failures throughout the company — including individual errors, poor management, byzantine committee structures, lack of training, and inadequate policies,” he continued. “In our report, we review these failures, including cultural issues that may have contributed to this problem, and we provide recommendations to ensure that it never occurs again.

“Our role was to find the facts as to why this recall took far too long. I believe we have done so,” Valukas went on to say.