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DETROIT — Quickly after joining the company, Joel Ewanick, General Motors' new vice president for U.S. marketing, is showing his autonomy by switching up the ad agencies which work on the Chevrolet account.

The GM marketing executive has decided that Publicis Worldwide and Campbell-Ewaldand are out and Goodby, Silverstein and Partners is in.

Officials said the change was to begin immediately.

"Based on my personal experience working with Goodby, Silverstein and Partners, I'm confident they have the creativity and ability to take the iconic Chevrolet brand to the next level — and to do it fast," stated Joel Ewanick, vice president for U.S. marketing at GM, who recently came on board after a short stint at Nissan.

Jim Campbell, U.S. vice president of Chevrolet marketing, added: "Chevrolet is focused on fuel-efficient cars, crossovers and trucks, as well as innovative advanced-technology products like the Volt.  With the Volt and the all-new Cruze launching later this year, we look forward to working with Goodby, Silverstein and Partners to build on the momentum that Chevrolet already has going in the market."

Goodby, Silverstein and Partners plans to open a Detroit office that will work with Chevrolet.

This isn't the agency's first experience with GM, as it did advertising for Saturn from 2002 until 2007.