The 2022 GMC Sierra 3500HD Denali is a premium heavy-duty pickup built for maximum towing and luxury. Powered by the 6.6L Duramax turbo-diesel V8 paired with the Allison 10-speed automatic transmission, it delivers exceptional torque and long-haul towing capability. The Denali trim adds a high-end interior with leather seating, advanced driver assistance features, and chrome exterior styling, combining work-truck strength with upscale comfort.