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The 2013 Sierra 1500 Extended Cab 4WD is a 4-door, up to 6-passenger PF, available in 7 trims, ranging from the Work Truck Standard Box to the SLT Long Box.
Upon introduction, the Work Truck Standard Box is equipped with a standard 4.8-liter, V8, 302-horsepower engine that achieves 13-mpg in the city and 18-mpg on the highway. A 4-speed a transmission with overdrive is standard. The SLT Long Box is equipped with a standard 5.3-liter, V8, 315-horsepower engine that achieves 15-mpg in the city and 21-mpg on the highway. A 6-speed a transmission with overdrive is standard.