Used 2021 GMC Sierra 3500HD for Sale near Chicago, IL

## Summary - With 802 currently listed for sale on CarGurus and an **average price of $53,513.00**, 27.2% of 2021 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals. - **Favorably reviewed:** Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars. - **80.0% of 2021 Sierra 3500HD models on CarGurus are accident free**. - The 2021 GMC Sierra 3500HD is known for impressive towing capacity and a variety of high-end trim options, including the luxurious Denali model, which offers advanced tech features and a refined interior. ## Why it stands out The 2021 GMC Sierra 3500HD differentiates itself with robust performance capabilities, including a maximum towing capacity that enhances its appeal for heavy-duty users. This model year introduced significant refinements over previous iterations, focusing on both capability and comfort. Notable features such as the MultiPro tailgate and advanced safety technologies make it a favorite among buyers looking for both utility and luxury. The Sierra 3500HD stands out with available powerful engine options, excellent payload capacity, and a comfortable ride, all complemented by a user-friendly infotainment system. While it excels in performance, potential buyers should also consider the truck's size, which might complicate maneuverability in urban environments. ## Other model years to consider - **[2023 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $58,337.00 - Good/great deal percentage: 24.1% - User rating: 5 / 5 - Total listings: 1,464 - **[2024 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $69,496.00 - Good/great deal percentage: 23.8% - User rating: 5 / 5 - Total listings: 1,425 - **[2022 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2022-GMC-Sierra-3500HD-c31917)** - Average price: $56,325.00 - Good/great deal percentage: 26.0% - User rating: 4.57 / 5 - Total listings: 914 This analysis is based on CarGurus' proprietary market data from February 16, 2026, CarGurus experts' opinions, and generative AI.