Used 2021 GMC Sierra 3500HD for Sale near Regina, SK

## Summary - With 94 currently listed for sale and an **average price of $67,545.00 CAD**, 18.1% of 2021 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals. - **Favourably reviewed:** Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars. - **100.0% of 2021 Sierra 3500HD models on CarGurus are accident free**. ## Why it stands out The 2021 GMC Sierra 3500HD is a powerful heavy-duty truck that excels at towing and hauling, making it a top choice for buyers who require a robust work vehicle. Its 6.6-litre V8 engine and optional Duramax turbodiesel provide impressive performance, enabling it to tow up to 16,100 kilograms (35,500 pounds) and carry a maximum payload of 3,375 kilograms (7,442 pounds). One of its key differentiators is its luxurious Denali trim, which adds a level of refinement uncommon in heavy-duty trucks, complete with premium materials and advanced technology features designed to enhance both comfort and utility. Additionally, the 2021 model boasts a full complement of safety technologies, addressing the growing market demand for both capability and safety. While its competitors, such as the Ford F-350 and Ram 3500, may offer marginally better towing capacities, the Sierra's reliability, stylish design, and high resale value make it an appealing choice in the heavy-duty truck segment. ## Other model years to consider - **[2024 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $82,287.00 CAD - Good/great deal percentage: 28.0% - User rating: 5 / 5 - Total listings: 168 - **[2023 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $75,934.00 CAD - Good/great deal percentage: 25.5% - Total listings: 153 - **[2025 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2025-GMC-Sierra-3500HD-c33463)** - Average price: $97,502.00 CAD - Good/great deal percentage: 27.8% - User rating: 5 / 5 - Total listings: 133 This analysis is based on CarGurus' proprietary market data from May 4, 2026, CarGurus experts' opinions, and generative AI.