GMC Sierra 3500HD for sale

GMC Sierra 3500HD 2023

The 2023 GMC Sierra 3500HD shares the AT4X off-road package introduced on the 2500HD, bringing Multimatic DSSV dampers and Eaton front and rear locking differentials to the heavy-duty dual rear wheel segment — a factory configuration without precedent in the class. The Denali Ultimate adds a head-up display, 22-way adjustable heated and ventilated front seats, and Opus leather trim. The Duramax 6.6-litre diesel and Allison ten-speed maintain their established reputation for sustained towing reliability. In DRW configuration with the fifth-wheel package, tow rating reaches 18,597 kg per published GMC specifications. The 13.4-inch GMC Infotainment 3 Plus is available on SLT and above. Super Cruise hands-free driving debuts on the 2023 Denali, extending coverage progressively across the Canadian mapped highway network. On any DRW example surpassing 120,000 km, inspect the front driveshaft universal joints and front wheel bearings, as sustained heavy towing accelerates wear on these components relative to lighter-duty applications.