Used 2015 GMC Sierra 3500HD for Sale near Middlebury, CT

## Summary - With 229 currently listed for sale and an **average price of $33,778.00**, 29.3% of 2015 GMC Sierra 3500HD models for sale on CarGurus are rated as good or great deals. - **Favorably reviewed:** Owners rated the 2015 GMC Sierra 3500HD 3.89 / 5 stars. - **56.8% of 2015 GMC Sierra 3500HD models on CarGurus are accident free**. - The 2015 GMC Sierra 3500HD is recognized for its strong towing capabilities, appealing design, and overall reliability. It features a comfortable ride quality and performance that many owners appreciate. ## Why it stands out The 2015 GMC Sierra 3500HD is a capable heavy-duty truck that stands out in its segment due to its combination of robust performance and luxury features. Known for its strong towing capabilities, the Sierra 3500HD can tow significant loads effectively, making it an ideal choice for buyers who require a dependable workhorse. Its design reflects a modern aesthetic, with many owners praising its beautiful exterior and refined interior, making it a viable option not just for commercial use but also for personal ownership. The vehicle offers various configurations, allowing buyers to select body styles and engines that suit their needs. While some users have noted that newer models are larger than expected, the Sierra 3500HD from 2015 strikes a balance between rugged capability and comfort. However, buyers should be aware of some criticisms regarding specific features and interior space that might not meet everyone's expectations. ## Other model years to consider - **[2023 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $57,940.00 - Good/great deal percentage: 34.0% - User rating: 5 / 5 - Total listings: 1,375 - **[2024 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $69,653.00 - Good/great deal percentage: 32.3% - User rating: 5 / 5 - Total listings: 1,382 - **[2021 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2021-GMC-Sierra-3500HD-c30861)** - Average price: $53,001.00 - Good/great deal percentage: 32.6% - User rating: 5 / 5 - Total listings: 727 This analysis is based on CarGurus' proprietary market data from March 23, 2026, CarGurus experts' opinions, and generative AI.