GMC Sierra 3500HD 2021 for sale

GMC Sierra 3500HD 2021

The 2021 GMC Sierra 3500HD is the maximum-payload variant of the Sierra heavy-duty lineup, available in single rear wheel (SRW) and dual rear wheel (DRW) configurations, with the DRW variant carrying a fifth-wheel tow rating of up to 18,597 kg in appropriate specification. The Duramax 6.6-litre L5P is the recommended engine for sustained full-load towing, paired with the Allison ten-speed automatic. The 6.6-litre petrol V8 is available for buyers with lower towing requirements. Maximum payload reaches 1,916 kg in DRW specification on appropriate trims. The standard 8-inch GMC Infotainment 3 display is fitted across the lineup, with the 13.4-inch screen available on Denali. The independent front suspension provides a daily-driving advantage over solid-front-axle competitors. For sustained towing operations in remote Canadian regions, the factory gooseneck prep package is preferable to any aftermarket adapter. Inspect the diesel particulate filter condition and EGR system on any high-kilometre diesel example before finalising purchase.