2008 GMC Yukon Hybrid
Mechanically identical to the Tahoe Hybrid that bowed in January of this year at the Detroit auto show, GMC’s Yukon Hybrid is a full hybrid that will have the capability of running on electric power alone at low speeds, unlike GM’s mild hybrids, the Chevrolet Silverado and Saturn Vue Green Line. The so-called two-mode system generates around 300 hp and consists of an electric motor/generator and a Vortec V-8 engine, using electric power only, engine power only, or a combination thereof at low speeds and light loads. It’s similar to Toyota hybrids in that it uses two planetary gear seats and two electric motors mated to a gasoline engine. Teamed with cylinder deactivation that allows the petrol-swilling V-8 to sip pennies as a V-4 in low-load conditions, the hybrid drivetrain ought to return fuel economy gains around 25 percent, good for a combined city/highway fuel economy of 20 mpg.
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