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|2003||2003 4dr SUT 320-hp 5.3L V8 6-sp shiftable automatic 4WD w/low range||15.5||
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|With the 320-horsepower 5.3L V8 engine, 6-speed shiftable automatic transmission, and four-wheel drive w/low range, the 2003 Chevrolet Avalanche has been averaging 15.5 MPG (miles per gallon).
The 2003 Chevrolet Avalanches in this analysis were driven mostly on the highway at an average speed of 80 miles per hour (about 30 percent of the miles driven). The rest of the miles were in the city (23 percent), in heavy traffic (21 percent), and in the suburbs (0 percent).
In addition, the average 2003 Chevrolet Avalanche in this analysis was driven on flat terrain with a medium foot and the AC not used at all.