DETROIT, - U.S. automaker General Motors put an in-house directive in reverse Thursday, backing away from a memo that asked employees to stop saying "Chevy." The original memo signed by Alan Batey, vice president for Chevrolet sales and service, and Jim Campbell, GM vice president for marketing told employees at the corporation's Detroit headquarters "consistency" is important for the Chevrolet brand -- and it would be helpful in that regard to stop referring to Chevrolets at Chevys, The New York Times reported. The memo said, "In global markets, we are establishing a significant presence for Chevrolet , and need to...