DETROIT -- All-new straight-six engine programs are practically non-existent these days, victims, we're told, of years of front-wheel-drive vehicle development and intensifying crash standards. Ron Kociba, GM Powertrain chief engineer for the all-new Vortec 4200 I-6, is fond of reminding, "We could've had a V-8," when deciding on what engine layout GM's next generation of midsize-truck/SUV powertrain development would focus. But Kociba and his engineering team wanted an inline 6-cyl. ...

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