About This GMC Sierra 3500HD Denali

The 2021 GMC Sierra 3500HD Denali Crew Cab is finished in Pacific Blue Metallic with a Jet Black leather interior and equipped with a four-wheel-drive system. Built as a heavy-duty truck, it combines Duramax diesel capability with premium features and off-road-oriented upgrades.
Power comes from a 6.6-liter Duramax turbodiesel V8 paired with an Allison 10-speed automatic transmission and an automatic locking rear differential. This setup delivers substantial torque and reliable performance for towing, hauling, and demanding conditions.
The exterior features 20-inch Hostile Typhoon wheels wrapped in 37-inch tires, supported by a 5.5-inch Pro Comp lift kit. Additional equipment includes power-operated side steps and integrated radar detectors with laser diffusers, enhancing both functionality and driver awareness.
Inside, the cabin is trimmed in Jet Black leather with heated and ventilated front seats, along with a heated steering wheel and heated rear seating. The Denali trim provides a refined and spacious interior suitable for long-distance travel.
Technology includes a heads-up display, 360-degree camera system, 8-inch touchscreen infotainment with Apple CarPlay and Android Auto, and a Bose premium audio system, offering advanced connectivity and driver assistance.
The 2021 GMC Sierra 3500HD delivers a strong combination of Duramax diesel performance, lifted stance, and upscale interior features, making it a capable and well-equipped heavy-duty truck.