Silver Ice Metallic Allison 1000 6-Speed Automatic, Ebony Leather. RWD Allison 1000 6-Speed Automatic Duramax 6.6L V8 TurbodieselRecent Arrival!Reviews:* Impressive hauling and towing capabilities; refined and quiet ride; solid build quality; responsive steering; comfortable seats. Source: Edmunds* If youve been a longtime Chevy HD fan and its time to trade-in your old outfit, the 2012 Chevy Silverado HDs numerous improvements will help keep you a Chevy loyalist. If youre an old Ram (formerly Dodge) or Ford guy and you arent happy with your current rig, you might be pleasantly surprised just how capable the Chevy Silverado HD really is. Source: KBB.com