Used 2021 GMC Sierra 3500HD for Sale near Atlanta, GA

## Summary - With 799 currently listed for sale on CarGurus and an **average price of $53,654.00**, 36.4% of 2021 GMC Sierra 3500HD models for sale on CarGurus are rated as good or great deals. - **Favorably reviewed:** Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars. - **79.6% of 2021 Sierra 3500HD models on CarGurus are accident free**. - The 2021 GMC Sierra 3500HD introduced enhancements in towing capabilities and luxurious features in higher trims, particularly the Denali, making it a strong contender in the heavy-duty truck category. ## Why it stands out The 2021 GMC Sierra 3500HD distinguishes itself with a blend of robust functionality and refined luxury. This year saw improvements in its towing capacity, making it capable of handling substantial loads, thanks to its powerful engine options including the 6.6-liter Duramax turbodiesel V8. The Sierra 3500HD is designed for those who need serious work capability without compromising on comfort. It features advanced technology and driver assistance options, especially in the higher trim levels, attracting buyers looking for both a workhorse and a deluxe vehicle. The introduction of features such as the MultiPro tailgate makes it easier to load and unload, while the luxurious Denali trim’s upscale materials and advanced infotainment system cater to more discerning buyers. ## Other model years to consider - **[2023 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $58,281.00 - Good/great deal percentage: 31.6% - User rating: 5 / 5 - Total listings: 1,451 - **[2024 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $69,461.00 - Good/great deal percentage: 30.0% - User rating: 5 / 5 - Total listings: 1,402 - **[2022 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2022-GMC-Sierra-3500HD-c31917)** - Average price: $56,301.00 - Good/great deal percentage: 33.4% - User rating: 4.57 / 5 - Total listings: 911 This analysis is based on CarGurus' proprietary market data from February 17, 2026, CarGurus experts' opinions, and generative AI.