New & Used 2026 GMC Sierra 3500HD for Sale near Chelmsford, ON

Summary

• With 79 currently listed for sale and an average price of $109,879 CAD, 25.3% of 2026 GMC Sierra 3500HD listings on CarGurus are rated as good or great deals.

Why it stands out

The 2026 GMC Sierra 3500HD stands out as a heavy-duty truck that blends serious work capability with a broader spread of trims and features than its utilitarian roots might suggest. It is offered in six trim levels, from the base Pro to SLE, SLT, AT4, Denali, and Denali Ultimate, and buyers can choose among regular cab, extended cab, and crew cab body styles, along with short-bed or long-bed configurations and single- or dual-wheel rear axles. That flexibility is a major part of its appeal, because it lets the truck be configured as a straightforward workhorse or as a more upscale, better-equipped hauler.

Capability remains the Sierra 3500HD’s defining strength. With the diesel engine, a single cab body, rear-wheel drive, a gooseneck hitch, and dual rear wheels, it can haul up to 3,375 kilograms and tow up to 16,100 kilograms. The engine lineup includes a 6.6-litre V8 with 401 horsepower and 464 pound-feet of torque, plus a 6.6-litre Duramax turbodiesel V8 with 445 hp and 910 lb-ft of torque. The truck also offers towing-focused technology such as trailer hitch guidance, jack-knife alert, adaptive cruise control with trailering assist, a weight limit monitor, and a transparent trailer camera view, which helps explain why it is aimed at buyers who need more than just brute strength.

Higher trims give the Sierra 3500HD a more premium feel, especially the AT4 and Denali models. The AT4 adds off-road hardware such as a specific suspension, all-terrain tyres, skid plates, a locking rear differential, and unique off-road drive modes, while the Denali brings luxury touches like premium leather, a wireless phone charger, a larger touchscreen, and parking proximity sensors. At the same time, the truck’s size can make it unwieldy in parking lots, and top trims can be prohibitively expensive.

Other model years to consider

• 2024 GMC Sierra 3500HD
  • Average price: $81,587 CAD
  • Good/great deal percentage: 23.4%
  • User rating: 5 / 5
  • Total listings: 214
• 2025 GMC Sierra 3500HD
  • Average price: $92,669 CAD
  • Good/great deal percentage: 29.0%
  • User rating: 5 / 5
  • Total listings: 183
• 2020 GMC Sierra 3500HD
  • Average price: $61,075 CAD
  • Good/great deal percentage: 34.8%
  • User rating: 5 / 5
  • Total listings: 66

Similar models to consider

• 2026 Ford F-350 Super Duty
  • Average price: $96,827 CAD
  • Good/great deal percentage: 25.5%
  • Total listings: 94
• 2026 RAM 3500
  • Average price: $91,668 CAD
  • Good/great deal percentage: 31.5%
  • Total listings: 111
• 2026 Chevrolet Silverado 3500HD
  • Average price: $97,926 CAD
  • Good/great deal percentage: 33.9%
  • Total listings: 56

This analysis is based on CarGurus' proprietary market data from October 2, 2026, CarGurus experts' opinions, and generative AI.