New & Used 2025 GMC Sierra 3500HD for Sale near Cobourg, ON

## Summary - With 133 currently listed for sale and an **average price of $97,502.00 CAD**, 27.8% of 2025 GMC Sierra 3500HD models for sale on CarGurus are rated as good or great deals. - **Favourably reviewed:** Owners rated the 2025 GMC Sierra 3500HD 5 / 5 stars. - **100.0% of 2025 Sierra 3500HD models on CarGurus are accident free**. ## Why it stands out The 2025 GMC Sierra 3500HD excels in the heavy-duty truck segment with its robust capabilities and luxurious features. It has established a reputation as a commercial-grade workhorse with superior towing and hauling potential compared to its competitors. The fifth generation of this truck offers two powerful engine options—a 6.6-litre V8 with 401 horsepower and a Duramax turbodiesel that yields 445 hp—enhancing its towing capacity significantly, up to 16,100 kilograms (35,500 pounds) when configured with the right options. The Sierra 3500HD's interior is refined, especially in higher trims like the Denali, which features advanced technology and high-quality materials. Buyers appreciate its blend of ruggedness and luxury, although they should be aware that some top trims can reach high price points. With an impressive accident-free rating, the 2025 Sierra 3500HD remains a strong contender in the heavy-duty truck market. ## 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% - Accident-free percentage: 100.0% - Total listings: 153 - **[2021 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2021-GMC-Sierra-3500HD-c30861)** - Average price: $67,545.00 CAD - Good/great deal percentage: 18.1% - User rating: 5 / 5 - Total listings: 94 This analysis is based on CarGurus' proprietary market data from May 4, 2026, CarGurus experts' opinions, and generative AI.