SUNROOF and DENALI. Driver Alert Package (Forward Collision Alert), Duramax Plus Package, and Off-Road Package (Hill Descent Control and Z71 Chrome Front Fender Emblems). Be the talk of the town when you roll down the street in this fire-breathing 2016 GMC Sierra 2500HD. The pin-you-to-your-seat performance of this great Sierra 2500HD will make it a favorite among our more passionate buyers. Visit our virtual showroom 24/7 @ Palmchevrolet.com.