Chevrolet unveiled its long-awaited, next-generation 2007 Tahoe this morning, providing a solid anticlimax for those who'd been waiting for it. Buyers of full-size SUVs will be pleased to find GM's displacement-on-demand technology has boosted preliminary mileage of the 5.3-liter Vortec V8 (standard on 4WD models) to 20.5 mpg. Of course, GM is already overselling the benefits of DoD. "It not only delivers better fuel economy than some smaller vehicles, it does so with the full capability expected of a full-size SUV. That means you can tow a boat out to your favorite lake on the weekend and take the kids to school during the week without worry, was the statement issued by Gary White, GM's vice president of fullsized trucks. White fails to mention that, unless the boat is a bathtub trawler, the engine will likely use full displacement, meaning mileage of around 14mpg. But hey, it's unveiling day; we won't spoil the party. Smoke up, Johnny.

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