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2015 GMC Truck Sierra 3500HD Double Cab 4WD
The 2015 Sierra 3500HD Double Cab 4WD is a 4-door, up to 6-passenger PF, available in 6 trims, ranging from the Base Long Box SRW to the SLT Long Box DRW.
Upon introduction, both trims are equipped with a standard 6.0-liter, V8, 360-horsepower engine. A 6-speed a transmission with overdrive is standard. See more... See Less