Price: To be announced

Details: Though gas mileage ratings for GM's new full-size SUVs are impressive among their competitive set, they aren't likely to bring smiles to anyone at the pump; competitors aside, their combined ratings still linger in the teens. That changes with the 2008 Yukon Hybrid, a twin to the upcoming Chevrolet Tahoe Hybrid that promises a 25 percent improvement in overall gas mileage. Both models are expected to hit showrooms sometime in 2007... See more photos and information on this vehicle