One Owner Carfax. Sierra 3500HD Denali, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, Allison 1000 6-Speed Automatic, 4WD, Summit White, and Leather. Nav! Your quest for a gently used truck is over. This great 2017 GMC Sierra 3500HD has only had one previous owner, with a great track record and a long life ahead of it. Take some of the worry out of buying an used vehicle with this one-owner gem. Prices do not include government fees and taxes, any finance charges, any dealer document processing charge, any electronic filing charge, and any emission testing charge.