THIS… is a 2021 GMC Sierra Denali, finished in Silver Steel Metallic with a black interior. The attached Carfax vehicle history report shows no accidents in this truck’s past. Some highlights include an auto-locking rear differential, heated and ventilated front seats, the Ultimate Package, adaptive suspension, the Trailering Package, and more detailed below. The seller reports modifying this Denali with the Hennessey Performance Goliath 650 Package, which includes a 2.9L Whipple supercharger, Chromoly hardened pushrods, crankcase ventilation system, and an HPE engine management calibration. Other modifications include a Hennessey steel cat-back exhaust and a Bakflip hard tonneau cover. The GMC Sierra Denali was marketed as the most luxurious version of GM’s truck platform(s), offering not only a very long list of features as standard but also a distinct look from its siblings. It was seen as one of the first luxury-focused trucks in the market. Power comes from a 6.2-liter supercharged V8 engine, which due to the addition of the Hennessey Goliath supercharger system and supporting modifications now produces 517 horsepower and 525 lb-ft of torque as confirmed by the dyno graph in the photo gallery. Power is sent to the rear or all four wheels via a 10-speed automatic transmission and 2-speed transfer case.