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

## Summary - With 119 currently listed for sale and an **average price of $93,593.00 CAD**, 31.1% of 2025 GMC Sierra 3500HDs 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 is known for its robust capabilities as a heavy-duty truck, making it a strong competitor in the heavy-duty segment alongside rivals like the Ford F-350 Super Duty and Ram 3500. With its roots dating back to the early 1900s, the Sierra has transitioned from a classic workhorse to a refined vehicle that caters to both commercial and luxury demands, especially in its high-end Denali trims. The 2025 model continues this trend by offering impressive hauling and towing capabilities, with a maximum towing capacity reaching up to 16,100 kilograms (35,500 pounds) when equipped with the diesel engine and dual rear wheels. Technologically, it boasts smart features for towing and a suite of safety options, ensuring a seamless combination of strength and modern conveniences. The interior quality has improved significantly over the years, with higher trims featuring luxurious materials and advanced technology that elevate the driving experience. While larger models may pose challenges in tight spaces, the GMC Sierra 3500HD remains a top choice for those who demand serious performance and comfort in one package. ## Other model years to consider - **[2024 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $83,161.00 CAD - Good/great deal percentage: 30.6% - User rating: 5 / 5 - Total listings: 147 - **[2023 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $77,354.00 CAD - Good/great deal percentage: 26.5% - Total listings: 147 - **[2021 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2021-GMC-Sierra-3500HD-c30861)** - Average price: $68,116.00 CAD - Good/great deal percentage: 26.6% - User rating: 5 / 5 - Total listings: 94 This analysis is based on CarGurus' proprietary market data from May 25, 2026, CarGurus experts' opinions, and generative AI.