New & Used 2025 GMC Sierra 3500HD for Sale near Monte Rio, CA

## Summary - With 1,105 currently listed for sale on CarGurus and an **average price of $79,681.00**, 29.3% of 2025 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals. - **95.7% of 2025 Sierra 3500HD models on CarGurus are accident free**. - The 2025 GMC Sierra 3500HD stands out with impressive towing and hauling capabilities, a luxurious Denali trim option, and modern tech features tailored for towing and off-roading enthusiasts. ## Why it stands out The 2025 GMC Sierra 3500HD represents a refinement of power and luxury in the heavy-duty truck category. Known for its robust capability, this model can tow up to 35,500 pounds when adequately equipped, including a gooseneck hitch and dual rear wheels. This year further enhances its appeal with a choice of two powerful engines: a 6.6-liter V8 gasoline engine delivering 401 horsepower and a 6.6-liter Duramax turbodiesel V8 offering an impressive 445 horsepower and 910 lb-ft of torque. The Sierra 3500HD is also known for its variety of configurations, allowing buyers to choose between regular cab, extended cab, and crew cab styles, and different bed lengths. Additionally, the luxurious Denali trim is particularly appealing for those seeking premium features, including upgraded materials, advanced technology, and enhanced safety systems. ## Other model years to consider - **[2023 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-3500HD-c32422)** - Average price: $58,004.00 - Good/great deal percentage: 31.0% - User rating: 5 / 5 - Total listings: 1,462 - **[2024 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2024-GMC-Sierra-3500HD-c32775)** - Average price: $69,319.00 - Good/great deal percentage: 30.1% - User rating: 5 / 5 - Total listings: 1,403 - **[2021 GMC Sierra 3500HD](https://www.cargurus.com/Cars/l-Used-2021-GMC-Sierra-3500HD-c30861)** - Average price: $53,676.00 - Good/great deal percentage: 34.0% - User rating: 5 / 5 - Total listings: 796 This analysis is based on CarGurus' proprietary market data from February 23, 2026, CarGurus experts' opinions, and generative AI.