06/17/2026
This 2016 GMC Sierra 2500HD Denali crew cab pickup is powered by a replacement turbodiesel 6.6 Duramax V8, which was built by SoCal Diesel with a new GM block and later rebuilt by Wagler Competition. It features a narrow-journal crankshaft, Wagler connecting rods, high-performance pistons, an alternate-firing-order camshaft, CNC-ported heads, a compound turbo setup, an Exergy Performance fuel pump, and 150%-over injectors. The six-speed Allison automatic transmission was rebuilt in 2017 with various billet components and again in 2024, and it is paired with a dual-range transfer case and a locking rear differential. Additional modifications include Cognito upper control arms, Fox shocks, Wehrli Custom traction bars, a leveling kit, Wil wood six-piston disc brakes, and 22″ American Force wheels. The Onyx Black exterior is joined by a Jet Black perforated leather interior, and further details include a folding tonneau cover, a bed liner, heated and ventilated front bucket seats, a Lock’er Down console safe, remote start, dual-zone automatic climate control, an infotainment system with smartphone integration, and JL Audio components. This K2XX Sierra 2500HD was purchased new by the seller and has 101k miles.