**A 2014 Chevy Tahoe averages 15 miles per gallon in the city and 21 miles per gallon on the highway.** The combined miles per gallon for the Tahoe is 17.

Both the two-wheel drive and four-wheel drive versions of the 2014 Tahoe have the same average miles per gallon. The 2015 Tahoe two-wheel drive model is slated to be slightly more fuel efficient at 23 highway miles per gallon. The four-wheel drive model of the 2015 Tahoe will remain the same at 21 highway miles per gallon. According to the U.S. department of Energy, many factors impact a vehicle's exact fuel efficiency, including driving speed, idling time, aerodynamics and weight.