Recent Arrival! Passed Dealer Inspection, Duramax 6.6L V8 Turbodiesel, Allison 1000 6-Speed Automatic, 4WD, Ebony Cloth. Blue Granite Metallic 2011 Chevrolet Silverado 2500HD LT 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 TurbodieselReviews:* Impressive hauling and towing capabilities; refined and quiet ride; solid build quality; responsive steering; comfortable seats. Source: Edmunds* If you are a satisfied past or current Silverado HD owner, you will love these much-improved new ones despite their mostly carryover styling. Their performance, capabilities, refinement and fuel efficiency have improved, especially with their new, surprisingly quiet available Duramax turbo diesel V8. Source: KBB.com