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|MPG||Number of Vehicles|
|14 miles per gallon||2 vehicles|
|15 miles per gallon||0 vehicles|
|16 miles per gallon||0 vehicles|
|17 miles per gallon||1 vehicles|
|18 miles per gallon||1 vehicles|
|19 miles per gallon||0 vehicles|
|20 miles per gallon||0 vehicles|
|21 miles per gallon||1 vehicles|
|22 miles per gallon||0 vehicles|
|23 miles per gallon||0 vehicles|
|24 miles per gallon||0 vehicles|
|25 miles per gallon||2 vehicles|
|2015||2015 4dr Crew Cab 5.5ft bed 420-hp 6.2L V8 8-sp shiftable automatic 4WD w/low range||20.94||
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|With the 420-horsepower 6.2L V8 engine, 10-speed shiftable automatic transmission, and four-wheel drive w/low range, the 2015 GMC Sierra 1500 has been averaging 20.94 MPG (miles per gallon).
The 2015 GMC Sierra 1500s in this analysis were driven mostly on the highway at an average speed of 65 miles per hour (about 95 percent of the miles driven). The rest of the miles were in the city (5 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).
In addition, the average 2015 GMC Sierra 1500 in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
|2015||2015 2dr Regular Cab 6.5ft bed 355-hp 5.3L V8 6-sp shiftable automatic 4WD w/low range||18.73||
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