Used 2021 GMC Sierra 2500HD for Sale near Ontario

## Summary - With 75 currently listed for sale and an **average price of $60,946.00 CAD**, 28.0% of 2021 GMC Sierra 2500HDs for sale on CarGurus are rated as good or great deals. - **Favourably reviewed:** Owners rated the 2021 GMC Sierra 2500HD 5 / 5 stars. - **100.0% of 2021 Sierra 2500HD models on CarGurus are accident free**. ## Why it stands out The 2021 GMC Sierra 2500HD is a capable heavy-duty pickup that distinguishes itself with a strong blend of luxury and utility. Its upscale design and "Professional Grade" refinement appeal to buyers seeking not just performance and practicality, but also comfort and advanced features, which might be lacking in some competitors like the Ram heavy-duty trucks. The Sierra 2500HD offers a spacious and well-appointed interior, equipped with modern technology such as Bluetooth connectivity, Android Auto, and Apple CarPlay. The truck is available in multiple configurations and trim levels, including the luxurious Denali variant, making it suitable for both work and leisure activities. Additionally, its robust 6.6-litre V8 engine, paired with an available Duramax diesel option, ensures impressive towing capabilities. With a clean accident history on all current listings, it provides peace of mind for potential buyers. ## Other model years to consider - **[2023 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-2500HD-c32421)** - Average price: $72,727.00 CAD - Good/great deal percentage: 34.3% - User rating: 4 / 5 - Total listings: 137 - **[2024 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-2500HD-c32774)** - Average price: $79,854.00 CAD - Good/great deal percentage: 30.4% - User rating: 4 / 5 - Total listings: 135 - **[2025 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2025-GMC-Sierra-2500HD-c33462)** - Average price: $96,440.00 CAD - Good/great deal percentage: 25.0% - User rating: 5 / 5 - Total listings: 116 This analysis is based on CarGurus' proprietary market data from May 11, 2026, CarGurus experts' opinions, and generative AI.