Summary

• With 72 currently listed for sale near Washington, DC and an average price of $48,887.00, 18.1% of 2020 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.

• Favorably reviewed: Owners rated the 2020 GMC Sierra 3500HD 5 / 5 stars.

• 72.2% of 2020 Sierra 3500HD models on CarGurus are accident free.

• The 2020 GMC Sierra 3500HD stands out with impressive towing capabilities, luxurious trim levels, and advanced technology tailored for both work and leisure.

Why it stands out

The 2020 GMC Sierra 3500HD is a robust heavy-duty truck that has garnered attention for its exceptional performance, especially when it comes to pulling heavy loads. Its ability to haul as much as 7,442 pounds and tow up to 35,500 pounds (with the right configuration) directly caters to buyers looking for a reliable workhorse. This model follows a tradition of strength and durability while also appealing to those wanting luxury; higher trims offer high-end features that can rival some consumer vehicles. Owners appreciate its comfortable and well-built interior, though some have expressed concerns over the absence of certain features, like a CD player, and have wished for better lumbar support adjustments. Notably, this model occupies a niche in the market as an upscale alternative to competitors like the Ford F-350 Super Duty and the Ram 3500, aligning well with buyers who regard quality and comfort in their heavy-duty vehicles.

Other model years to consider

• 2024 GMC Sierra 3500HD

  • Average price: $79,690.00
  • Good/great deal percentage: 17.6%
  • User rating: 5 / 5
  • Total listings: 176

• 2025 GMC Sierra 3500HD

  • Average price: $74,242.00
  • Good/great deal percentage: 14.0%
  • User rating: 5 / 5
  • Total listings: 164

• 2023 GMC Sierra 3500HD

  • Average price: $65,266.00
  • Good/great deal percentage: 17.1%
  • Total listings: 170

This analysis is based on CarGurus' proprietary market data from June 23, 2026, CarGurus experts' opinions, and generative AI.