Under Stephens' supervision of engine and powertrain design and production, GM is working to boost performance and fuel economy. GM has rolled out an impressive family of six-speed transmissions and several direct-injection engines. A groundbreaking new diesel engine eliminates intake and exhaust manifolds.
FROM OUR ARCHIVES: GM's Stephens -- 2008 Automotive News All-Star
Executive vice president, global powertrain and global quality, General Motors
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