Originally, when the GMC Yukon Hybrid and the Chevrolet Tahoe Hybrid made their debut, GM said they expect a 25 percent improvement in fuel-economy than their standard versions. GM is now saying that it expects the hybrid SUVs to get 40 percent better fuel-economy giving them both 19 or 20 miles to the gallon.
When the Yukon and Tahoe Hybrid debut this fall, they will be equipped with, what GM calls, a two-mode hybrid that uses two electric motors. The engine is costing GM $10,000....
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