New & Used 2025 GMC Sierra 3500HD for Sale near Stratton, CO

## Summary - With 1,151 currently listed for sale and an **average price of $78,501.00**, 31.0% of 2025 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals. - **95.5% of 2025 Sierra 3500HD models on CarGurus are accident free**. - The 2025 GMC Sierra 3500HD stands out with its impressive towing and hauling capabilities, luxurious higher trim levels, and advanced smart tech features tailored for towing and off-roading. ## Why it stands out The 2025 GMC Sierra 3500HD remains a top competitive choice in the heavy-duty truck market, combining remarkable capabilities with a touch of luxury. Renowned for its exceptional towing capacity—up to 35,500 pounds—the Sierra 3500HD is equipped with advanced engine options that ensure powerful performance. The latest 6.6-liter V8 and Duramax turbodiesel engines not only enhance towing potential but also provide innovative technologies that support hauling and off-roading activities. The truck’s interior has evolved, particularly in the higher trim levels, which feature upscale materials and a variety of tech enhancements that improve both comfort and utility. The introduction of features like the MultiPro tailgate and advanced safety options positions the Sierra 3500HD as a versatile workhorse that appeals to buyers who require rugged performance without compromising on luxury. ## 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.