It was a historic event when 20 engineers each from GM North America, Opel and Saab gathered at the GM's technical center in Warren, Michigan, six years ago to sketch a midsize chassis, named Epsilon, to be used by all three divisions.

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It was a historic event when 20 engineers each from GM North America, Opel and Saab gathered at the GM technical center in Warren, Mich. six years ago to sketch a midsize chassis, named Epsilon, to be used by all three divisions.

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The Ecosign team fired up AutoCAD, a design software used by architects and engineers to sketch three-dimensional project drafts, and used PCs to plug in technical numbers for Olympic courses.

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