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 How Jeff Goodby Explained the Chevy Loss to GSP Employees Read Memo to Staff About General Motors' Move to Nix Shop From Commonwealth Structure By Rupal Parekh, Published on March 15, 2013 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. Register Now Already a member? Log in.