Joel Ewanick, GM's recently installed global CMO, is charged with breathing new life into the company's disparate brands -- no small order.
By Doron Levin, contributor
FORTUNE -- A conversation with Joel Ewanick, General Motors' chief marketing officer for the past ten months, doesn't proceed for long without his mention of "swim lanes."
Ewanick isn't talking about exercise, but his primary task at a resurgent GM (GM). In the 51-year-old executive's view, his MORE