The 2007 GMC Truck Sierra Classic 2500HD Extended Cab 4WD is a 4-door, up to 6-passenger full size pickup, available in 10 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, 300-horsepower engine. A 4-speed automatic transmission with overdrive is standard, and a 5-speed manual transmission with overdrive is optional.

The 2007 GMC Truck Sierra Classic 2500HD Extended Cab 4WD is a carryover from 2006.