2024 Gmc Sierra 3500hd Towing Capacity. Dual rear wheels are available on certain configurations to increase towing and payload capacity. For conventional towing, the sierra 3500hd goes as high as 20,000 pounds with the diesel engine.

Dual rear wheels are available on certain configurations to increase towing and payload capacity. As with 2024, a gooseneck trailer hitch on the 2wd 3500 hd regular cab / long bed drw (dual rear wheel) configuration gives the highest 2025 gmc sierra hd towing.