About This GMC Sierra Denali

This 2021 GMC Sierra Denali 4x4 is finished in Silver Steel Metallic with a Black interior, combining premium luxury with enhanced performance. Powered by a supercharged 6.2L V8 upgraded with the Hennessey Goliath 650 package, it produces approximately 517 horsepower and 525 lb-ft of torque, paired with a 10-speed automatic transmission and 4WD system for strong, responsive performance.
Upgrades include a Whipple supercharger, hardened pushrods, revised engine calibration, crankcase ventilation system, and a Hennessey steel cat-back exhaust, along with a Bakflip hard tonneau cover. Factory features include an auto-locking rear differential, heated and ventilated front seats, Ultimate Package, adaptive suspension, and Trailering Package.
With its combination of luxury features and performance upgrades, this Sierra Denali delivers a refined driving experience with added power and presence both on and off the road.