A Reuters profile of General Motors CFO Dan Ammann says thefinance chief is pushing for change at a company that critics argueis hopelessly inefficient. Although GM has emerged from bankruptcy,its stock trades under $20 and its operating margin trails those ofits competitors.

Ammann suggests he's looking to increase efficiency andeliminate the competition among GM's units. The former MorganStanley investment banker joined GM as treasurer in 2010 after thecompany's finance department came under fire for its failingsduring the 2009 bankruptcy filing. He was named CFO in 2011.

The story notes that Ammann tries to distance himself from the“bean counters,” in part by driving his Corvette Z06 around GM'stest track at a speed of up to 150 miles per hour. Ammann is one ofjust 30 GM executives certified to drive at high speeds at thetrack.