Used 2020 GMC Sierra 3500HD for Sale near Saint-Eustache, QC

Summary

• With 55 currently listed for sale and an average price of $57,156.00 CAD, 12.7% of 2020 GMC Sierras 3500HD for sale on CarGurus are rated as good or great deals.

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

• 100.0% of 2020 Sierra 3500HD models on CarGurus are accident free.

Why it stands out

The 2020 GMC Sierra 3500HD stands out as a heavy-duty truck that blends serious capability with a more polished feel than its workhorse roots might suggest. For 2020, the fifth-generation model debuted with a larger footprint, revised styling, and significant improvements to its maximum towing capacity. It was offered in a wide range of cab, bed, and rear-axle configurations, which makes it appealing to buyers who need a truck tailored to specific hauling or towing duties rather than a one-size-fits-all setup.

Power comes from two 6.6-litre V8 options: a gasoline engine with 401 horsepower and 464 pound-feet of torque, or a Duramax turbodiesel V8 with 445 hp and 910 lb-ft of torque. The diesel pairs with a 10-speed automatic, while the gas engine uses a six-speed automatic. Properly equipped, the Sierra 3500HD can haul 3,375 kilograms of cargo and tow up to 16,100 kilograms, though those figures require the diesel engine, a single cab body, rear-wheel drive, a gooseneck hitch, and dual rear wheels. That combination of strength and configurability is a major part of its appeal.

The cabin also helps define the truck’s character. Even the base trim includes a seven-inch infotainment touchscreen, Apple CarPlay, Android Auto, power windows, keyless entry, cruise control, and a trailer hitch receiver with hitch guidance. Higher trims add more comfort and technology, including leather upholstery, dual-zone automatic climate control, a Bose premium audio system, a head-up display, surround-view cameras, and, at the top of the range, luxury touches such as premium leather, a wireless phone charger, parking proximity sensors, and a larger eight-inch touchscreen. The trade-off is that the biggest versions can be expensive, and the truck’s size can make it unwieldy in parking lots, but for buyers who prioritise towing muscle, available luxury, and modern towing tech, the 2020 Sierra 3500HD is a compelling choice.

Other model years to consider

• 2024 GMC Sierra 3500HD

  • Average price: $82,482.00 CAD
  • Good/great deal percentage: 26.6%
  • User rating: 5 / 5
  • Total listings: 184

• 2025 GMC Sierra 3500HD

  • Average price: $94,088.00 CAD
  • Good/great deal percentage: 27.4%
  • User rating: 5 / 5
  • Total listings: 157

• 2023 GMC Sierra 3500HD

  • Average price: $74,287.00 CAD
  • Good/great deal percentage: 26.5%
  • Total listings: 162

This analysis is based on CarGurus' proprietary market data from August 17, 2026, CarGurus experts' opinions, and generative AI.