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The 2022 Sierra 3500HD Denali with L5P Duramax is a top-tier heavy-duty truck — combining industry-leading towing (20K–36K lb), plush comfort, and advanced tech. Owners praise its quiet diesel power and smooth shifting.
Here’s a full breakdown of the 2022 GMC Sierra 3500HD Denali with the Duramax diesel:
Engine & Transmission
6.6 L L5P Duramax V8 diesel produces approximately 445 hp and 910 lb‑ft of torque, paired with an Allison 10-speed automatic Reddit+15TrueCar+15Car and Driver+15.
Towing & Payload Capacity
Conventional towing: up to 20,000 lb with a ball hitch Reddit+11TrueCar+11Car and Driver+11GM Authority+1Reddit+1.
Fifth-wheel/gooseneck: reaches up to 36,000 lb Reddit+8TrueCar+8uebelhorvincennes.com+8.
Payload capacity: maxes out around 7,442 lb TrueCar+9TrueCar+9Reddit+9.
GCWR (Gross Combined Weight Rating)
Approximately 40,000 lb on crew cab Denali configurations
Details
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