Used 2021 GMC Sierra 2500HD for Sale near Decatur, AL

## Summary - With 1,962 currently listed for sale on CarGurus and an **average price of $50,681.00**, 32.2% of 2021 GMC Sierra 2500HD models are rated as good or great deals. - **Favorably reviewed:** Owners rated the 2021 GMC Sierra 2500HD 4.69 / 5 stars. - **79.3% of 2021 Sierra 2500HD models on CarGurus are accident free**. - The 2021 GMC Sierra 2500HD is noted for its upscale features, competitive technology, and comfort compared to other heavy-duty trucks. ## Why it stands out The 2021 GMC Sierra 2500HD distinguishes itself in the competitive heavy-duty truck market with its blend of rugged capability and refined luxury. Owners appreciate the trusted performance along with advanced technology and comfort, which enhance the driving experience. The Sierra 2500HD is backed by impressive user reviews with a rating of 4.69 / 5 stars, indicating high customer satisfaction. Not only is it equipped with features comparable to the lighter-duty Sierra 1500, but it also offers a more polished design and finish. This model year continues to leverage GMC’s branding as "Professional Grade," appealing to buyers looking for reliability and a touch of sophistication in their trucks. ## Other model years to consider - **[2023 GMC Sierra 2500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-2500HD-c32421)** - Average price: $56,852.00 - Good/great deal percentage: 32.8% - User rating: 4.33 / 5 - Total listings: 3,427 - **[2020 GMC Sierra 2500HD](https://www.cargurus.com/Cars/l-Used-2020-GMC-Sierra-2500HD-c28993)** - Average price: $48,983.00 - Good/great deal percentage: 32.9% - User rating: 4.88 / 5 - Total listings: 1,385 This analysis is based on CarGurus' proprietary market data from March 9, 2026, CarGurus experts' opinions, and generative AI.