Recent Arrival! Clean CARFAX. Quicksilver Metallic 2013 GMC Sierra 2500HD SLE 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 Turbodiesel Allison 1000 6-Speed Automatic, 4WD, Ebony Cloth. Odometer is 47120 miles below market average! Reviews: * Impressive hauling and towing capabilities; refined and quiet ride; solid build quality; responsive steering. Source: Edmunds * If you require a vehicle that can transport over 10,000 pounds without breaking a sweat, the 2013 GMC Sierra HD deserves a spot on your short list. Furthermore, most prospective HD truck buyers who place a premium on luxury will find the Sierra HD Denali worth springing for. Source: KBB.com.