Allison 1000 6-Speed Automatic, 4WD, Jet Black Medium Ash Gray Piping Stitching Leather. Graphite Metallic 2017 Chevrolet Silverado 2500HD High Country 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 TurbodieselRecent Arrival! Odometer is 13833 miles below market average!Awards: * 2017 KBB.com 10 Most Awarded BrandsLOWEST TAX RATE IN THE STATE @ 6.25%. Selling and Servicing vehicles in Sandwich, Plano, Yorkville, Oswego, Naperville, Plainfield, Joliet, DeKalb, Elburn, St. Charles, Geneva, Batavia, Somonauk, Leland, Earlville, Mendota, Shorewood, Channahon, Aurora, North Aurora, Lisle, Ottawa, Dixon, Sterling, LaSalle, Peru, Rockford and Sugar Grove for over 4 Decades. ... see more