General Motors hired Joel Ewanick as vice president of U.S. marketing just two weeks ago, but he’s already making a mark.A month after GM consolidated creative duties on its Chevrolet brand at Publicis Groupe’s Publicis, the automaker is undoing that decision by shifting lead duties on the brand to Omnicom Group’s Goodby, Silverstein & Partners — Ewanick’s agency when he led marketing at Hyundai Motors America — and rehiring longtime Chevy shop Campbell-Ewald to handle retail and sponsorship ads, according to sources. It was not immediately clear if creative duties on Chevy trucks also would return to C-E, a unit of Interpublic Group.

via Chevy Enlists Goodby as Lead Shop, Rehires C-E for Retail.