You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Joel Ewanick's First Order of Business at GM: Chevy Preps a Shift to Goodby Silverstein Weeks After Brand's Consolidation at Publicis By Rupal Parekh, Published on May 19, 2010 10 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.