Used 2021 GMC Sierra 3500HD for Sale near Alberta

## Summary - With 80 currently listed for sale and an **average price of $67,090.00 CAD**, 23.8% of 2021 GMC Sierras for sale on CarGurus are rated as good or great deals. - **Favourably reviewed:** Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars. - **100.0% of 2021 Sierra 3500HD models on CarGurus are accident free**. ## Why it stands out The 2021 GMC Sierra 3500HD remains a formidable player in the heavy-duty truck segment, renowned for its exceptional towing and hauling capabilities. With a robust design and a range of powerful engine options, including a Duramax turbodiesel that can produce up to 445 horsepower and 910 lb-ft of torque, the Sierra 3500HD is engineered for serious work while maintaining a level of luxury and refinement. The introduction of features like the MultiPro tailgate and advanced towing technologies adds significant convenience for users. Buyers are also drawn to the high-quality interior, especially in the Denali trim, which offers a plush and well-equipped driving environment. However, potential buyers should note that while this truck excels in performance and luxury, its size can make manoeuvring in tight spaces a challenge, and higher trims can be comparatively expensive. ## Other model years to consider - **[2023 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $75,835.00 CAD - Good/great deal percentage: 25.5% - User rating: 5 / 5 - Total listings: 141 - **[2024 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $82,758.00 CAD - Good/great deal percentage: 29.3% - User rating: 5 / 5 - Total listings: 164 - **[2025 GMC Sierra 3500HD](https://www.cargurus.ca/Cars/l-Used-2025-GMC-Sierra-3500HD-c33463)** - Average price: $98,301.00 CAD - Good/great deal percentage: 29.2% - User rating: 5 / 5 - Total listings: 130 This analysis is based on CarGurus' proprietary market data from April 27, 2026, CarGurus experts' opinions, and generative AI.