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

## Summary - With 119 currently listed for sale and an **average price of $95,078.00 CAD**, 32.8% 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 continues to establish itself as a formidable presence in the heavy-duty truck market. Known for its impressive towing and hauling capabilities, this model is able to tow up to 16,100 kilograms and haul up to 3,375 kilograms, making it an ideal choice for commercial users and those looking for a reliable workhorse. Recently, the Sierra line has evolved to provide a more luxurious experience, especially within its higher trims like the Denali Ultimate, which offer a wealth of advanced technology and upscale materials. The 2025 model features a user-friendly infotainment system, robust safety features, and a choice between a powerful 6.6-litre V8 engine and a Duramax turbodiesel option. The combination of strength, capability, and comfort makes the Sierra 3500HD appealing to buyers seeking both performance and refined aesthetics. ## Other model years to consider - **[2024 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $82,734.00 CAD - Good/great deal percentage: 30.7% - User rating: 5 / 5 - Total listings: 150 - **[2023 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $76,604.00 CAD - Good/great deal percentage: 28.8% - Accident-free percentage: 100.0% - Total listings: 146 - **[2021 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2021-GMC-Sierra-3500HD-c30861)** - Average price: $68,158.00 CAD - Good/great deal percentage: 27.7% - User rating: 5 / 5 - Total listings: 94 This analysis is based on CarGurus' proprietary market data from May 18, 2026, CarGurus experts' opinions, and generative AI.