Shake Up at GM

As Dan Akerson nears his two-year mark as General Motors CEO on Sept. 1, executive upheaval has emerged as a hallmark of his tenure. And more may be coming.

The turnover — including last week’s ouster of marketing chief Joel Ewanick — has accelerated in Akerson’s second year, while GM’s U.S. market share slipped, losses in Europe widened and GM’s stock price languished. The management flux has created an air of uncertainty — and an undercurrent of fear, some insiders say — that impedes progress.