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GMC Sierra 1500 Fuel Economy (L/100km)

L/100km Number of Vehicles
13 liters per 100 kilometers 1 vehicles
14 liters per 100 kilometers 4 vehicles
15 liters per 100 kilometers 0 vehicles
16 liters per 100 kilometers 0 vehicles
17 liters per 100 kilometers 0 vehicles
18 liters per 100 kilometers 0 vehicles
19 liters per 100 kilometers 1 vehicles
Model Year Body/Powertrain L/100km  
2003 2003 4dr Extended Cab 6.5ft bed 295-hp 5.3L V8 4-sp automatic 4WD w/low range 14
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With the engine, transmission, and rear-wheel drive, the 2003 GMC Sierra 1500 has been averaging 14 L/100km (liters per 100 kilometers).

The 2003 GMC Sierra 1500s in this analysis were driven mostly on the highway at an average speed of 60 kilometers per hour (about 70 percent of the kilometers driven). The rest of the kilometers 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 18.8
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2003 2003 4dr Extended Cab 6.5ft bed 295-hp 5.3L V8 4-sp automatic RWD 13.57
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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 (L/100km)

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 L/100km based on how and where you drive a car.