Ok here are a couple of links.



2008 Chevrolet Tahoe Hybrid 1HY 4WD — Yahoo! Autos

2008 Chevrolet Tahoe LTZ 4WD — Yahoo! Autos

Basically it is 20Hwy/20city for the Hybrid and 20hwy/14city for the gas only. So if you do a lot of city driving the hybrid is better, but then again if you have to do a lot of city driving it does not make much sense to buy a Tahoe.