| The 2007 GMC Truck Sierra 2500HD Extended Cab 4WD is a 4-door, up to 6-passenger full size pickup, available in 8 trims, ranging from the Work Truck Standard Box to the SLT Long Box.
Upon introduction, both trims are equipped with a standard 6.0-liter, V8, 353-horsepower engine. A 6-speed automatic transmission with overdrive is standard.
The 2007 GMC Truck Sierra 2500HD Extended Cab 4WD is redesigned for 2007.
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