~EXCERPT~ DETROIT (AP) -- The chief financial officer of General Motors Co., who brought the company through a successful public stock offering and was once considered a candidate for CEO, is resigning as of April 1. In a surprise announcement Thursday, GM said that Chris Liddell, 52, will be replaced by Treasurer Dan Ammann. Liddell has been on the job for just 14 months. During a hastily arranged conference call with reporters, Liddell said he had no job lined up, but doesn't want to be a chief financial officer any longer. He said he had achieved his goals of pulling...
