It's not unusual for a departing chief exec to maintain some involvement with the corporation he or she led, usually by holding onto or taking a position on the company's board of directors.
That can be a bad idea. Consider GM's Ed Whitacre.
Akerson will need to convince shareholders that GM, which is only a year out of bankruptcy and has posted just two profitable quarters, is a worthy investment. He'll also have to make sure the carmaker's dramatic turnaround is built to last.