通用汽车首席财务官辞职

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General Motors's finance chief Chris Liddell, who was passed over for the top job at the automaker last year, has unexpectedly resigned. His departure sparks fresh concerns about the automaker's stability at the top.

An unexpected change in top management for General Motors- just as it seems to be shifting into gear.

Chief Financial Officer Chris Liddell, stepping down from the company he joined just last year.

After GM emerged from bankruptcy, it was Liddell that steered the company through its $23 billion dollar initial public offering.

Jeremy Anwyl, CEO of Edmunds.com said "When you look at where they were before the bankruptcy, really ever since they went into bankruptcy and then the months since then, they have been in many ways at least financially a very different company and obviously the CFO deserves a big share of the credit for that."

Liddell left the CFO job at Microsoft to come to GM- positioning himself for a higher level position. But when the top job opened up, Liddell was passed over.

Since then, new CEO Dan Akerson has been making changes to senior management, as he maps a new course for the automaker.

Efraim Levy, Equity Auto Analyst of Standard & Poors said "GM now has to execute on their plan. Take advantage of their new structure. They have to continue to bring quality products to the marketplace that people want to buy. They have had some successes lately. I think they are on the right track and one thing they should benefit from is a stronger industry overall, both in the US and internationally.

The frequent change in drivers steering GM is a cause of concern for some. General Motors has had four CEO's in the last two years.

Liddell's successor will be the fourth CFO in three years.