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GMC Sierra 1500 MPG

MPG Number of Vehicles
13 miles per gallon 1 vehicles
14 miles per gallon 0 vehicles
15 miles per gallon 0 vehicles
16 miles per gallon 0 vehicles
17 miles per gallon 4 vehicles
18 miles per gallon 1 vehicles
Model Year Body/Powertrain MPG  
2003 2003 4dr Extended Cab 6.5ft bed 295-hp 5.3L V8 4-sp automatic 4WD w/low range 16.8
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With the engine, transmission, and rear-wheel drive, the 2003 GMC Sierra 1500 has been averaging 16.8 MPG (miles per gallon).

The 2003 GMC Sierra 1500s in this analysis were driven mostly on the highway at an average speed of 60 miles per hour (about 70 percent of the miles driven). The rest of the miles were in the city (10 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).

In addition, the average 2003 GMC Sierra 1500 in this analysis was driven on flat terrain with a light foot and the AC not used at all.
2003 2003 4dr Extended Cab 6.5ft bed 285-hp 5.3L V8 4-sp automatic 4WD, part-time w/low range 12.5
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2003 2003 4dr Extended Cab 6.5ft bed 295-hp 5.3L V8 4-sp automatic RWD 17.33
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What Our Members Are Saying about the Real Gas Mileage of the 2003 GMC Sierra 1500

2003 GMC Sierra 1500 Real Gas Mileage: Pros
YearBody/PowertrainComment
2004 4dr Extended Cab 6.5ft bed 295-horsepower 5.3L V8
4-speed automatic 4WD w/low range		 Its great. see full GMC Sierra 1500 review
 

2003 GMC Sierra 1500 Gas Mileage (MPG)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the GMC Sierra 1500's real-world MPG based on how and where you drive a car.