Experience the Power and Prestige of the 2016 GMC Sierra 3500HD Denali in Onyx Black Built for Those Who Demand More. The 2016 GMC Sierra 3500HD Denali is the ultimate powerhouse for those who need a truck that works as hard as they do. With its robust 8-cylinder diesel engine and Allison 1000 6-speed automatic transmission, this 4x4 beast is ready to tackle any terrain or heavy-duty task. The turbocharged powertrain, coupled with a locking/limited slip differential, ensures exceptional towing
