General Motors Co. and SAIC Motor Corp. Ltd. are strengthening their partnership by agreeing to co-develop a new electric-vehicle architecture at their jointly owned Pan Asia Technical Automotive Center (PATAC) in Shanghai, the two automakers announced Sept. 20. Joint teams from the parent companies will cooperate on the development of key components and vehicle structures in addition to an overall EV architecture, which will be used as the basis for models to be sold under each company's brand name in China. The architecture also will be used by both companies to build EVs around the world. Product details and timing will be announced later. The two companies' joint venture, Shanghai GM, introduced the Sail electric concept vehicle (based on the Chinese Chevrolet Sail production model) late last year at the Guangzhou Auto Show. Today’s agreement is a follow-up to the nonbinding memorandum of understanding on strategic cooperation signed by SAIC and GM on Nov. 3, 2010. GM and SAIC are making an equal investment in the project.