Key GM crisis questions: Who approved switch revision and why recall took so long

WASHINGTON/DETROIT (Reuters) - Among the most critical unanswered questions in General Motors' mounting crisis over a defective ignition switch that led to crashes and at least 13 deaths is who, eight years ago, approved a change in the part for new vehicles and why that didn't lead to a recall of older cars to fix the problem. Among the evidence that investigators inside and outside of the company will need to reconcile is the company's timeline of the switch's engineering, which describes an unnamed GM engineer approving the design change, and the deposition of a senior switch engineer, Ray DeGiorgio, who said he was not aware of it. GM declined to discuss the matter beyond its timeline or to make DeGiorgio available for an interview. DeGiorgio referred Reuters to GM, which has presented no evidence to suggest that he was the executive approving the design change.

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