Used 2021 GMC Sierra 2500HD for Sale near Ontario

## Summary - With 68 currently listed for sale and an **average price of $60,369.00 CAD**, 26.5% 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 standout in the heavy-duty pickup segment, offering a blend of luxury and capability that appeals to both consumers and commercial buyers. As part of GMC's "Professional Grade" branding, it features upscale design elements and advanced technology often found in its lighter-duty siblings. Notably, the truck boasts a robust lineup of engine options, including the powerful Duramax diesel variant, which provides excellent towing capabilities. In addition, the Sierra 2500HD excels in comfort and convenience with features such as a user-friendly infotainment system and a spacious cabin, making it a popular choice for those looking for a work truck that doesn’t compromise on luxury. Despite its many strengths, some older models of the Sierra 2500HD are noted for reliability concerns, yet the 2021 model avoids many of these issues, making it a reliable choice for buyers. ## Other model years to consider - **[2023 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-2500HD-c32421)** - Average price: $71,385.00 CAD - Good/great deal percentage: 20.5% - User rating: 4 / 5 - Total listings: 122 - **[2024 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-2500HD-c32774)** - Average price: $81,332.00 CAD - Good/great deal percentage: 21.4% - User rating: 4 / 5 - Total listings: 126 - **[2025 GMC Sierra 2500HD](https://www.cargurus.ca/Cars/l-Used-2025-GMC-Sierra-2500HD-c33462)** - Average price: $94,773.00 CAD - Good/great deal percentage: 22.5% - User rating: 5 / 5 - Total listings: 102 This analysis is based on CarGurus' proprietary market data from April 27, 2026, CarGurus experts' opinions, and generative AI.