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The last time I drove the Tahoe, there was a bit of a contest involved. A group of auto journalists were employed with the task of getting the best gas mileage possible. During a two-hour trek filled with both city and highway driving, the economy numbers were impressive amongst a group of drivers who usually vie for worst gas mileage. My driving partner and I managed 22.3 mpg in a 2WD model with fairly normal driving (i.e. we used our air conditioner and didn’t crawl around to keep the vehicle in the electric motor the whole time). We were beat by another 2WD pair who got 23.9 mpg.
All of us, however, got smoked by a couple of drivers in a 4WD model that averaged 24.3 mpg. This pair closed its windows in a hot climate, drove with the windows up, tucked in the side mirrors to make it more aerodynamic and crawled whenever possible.

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