General Motors' first full hybrid reaches showrooms in November as a Chevrolet Tahoe Hybrid or a GMC Yukon Hybrid. Micky Bly, GM's director of hybrid powertrain integration, says the big SUV will get 25 percent better fuel economy overall than the gasoline-only version, and about 40 percent better in city driving. That's about five or six more mpg in the city and one to two more on the highway.
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