Unveiled as a concept at the 2016 SEMA show, the Alaskan Edition features a huge stainless-steel snowplow. Powered by General Motors’ revised 6.6-liter Duramax diesel with (naturally) four-wheel drive, the show truck rolls on 20-inch chrome wheels. Plenty of chrome elsewhere—bumper, grille, mirrors—accents the blue-and-silver exterior. But the Alaskan isn’t just a show pony. It also is coming to dealerships for 2017,with slightly different equipment but the same snow-clearing mission. The production version comes with the Snow Plow Prep package (but not the plow),18-inch wheels (in gloss black) with Goodyear Wrangler DuraTrac tires, trailering mirrors, auxiliary switches, roof marker lights,a spray-in bedliner, and rubber flooring. It’s available on four-by-four Silverado 2500HD and 3500HD WT and LT models, in regular, double-cab, or crew-cab body styles,with either the gasoline or diesel V-8.