Summary

• With 199 currently listed for sale and an average price of $34,696.00, 28.6% of 2015 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.

• Favorably reviewed: Owners rated the 2015 GMC Sierra 3500HD 4.5 / 5 stars.

• 73.9% of 2015 Sierra 3500HD models on CarGurus are accident free.

Why it stands out

The 2015 GMC Sierra 3500HD stands out as a heavy-duty truck that blends serious capability with a more upscale cabin than many buyers might expect. For this generation, GMC gave the truck a completely new style, with blocky, hard-edged exterior design and a larger-looking stance, while the interior was also completely revamped with smarter soft-touch materials and a dashboard that grouped the infotainment screen, climate controls, and air vents in a central pod. That combination makes the truck feel more modern and more polished than a bare-bones workhorse, especially in Denali form.

Capability remains the core of the Sierra 3500HD’s appeal. The 2015 model offered a 6.0-liter gasoline V8 with 360 horsepower and 380 pound-feet of torque, plus a turbocharged 6.6-liter diesel V8 with 397 hp and 765 lb-ft of torque, both paired with a six-speed automatic transmission. Properly equipped, it could haul as much as 7,374 pounds of payload and tow up to 19,600 pounds with a standard ball hitch, or 23,200 pounds with a fifth-wheel hitch. Buyers also had a wide range of cab, bed, axle, and trim choices, from the basic Work Truck to the well-equipped Denali, which helped the Sierra 3500HD serve both jobsite duty and more comfortable daily use.

There are tradeoffs, though. The 2015 Sierra 3500HD was hit with 18 separate recalls, and some issues carried on into later years of the generation. Even so, its strong towing numbers, improved interior, and broad configuration range make it a compelling choice for shoppers who need a serious heavy-duty pickup but still want a truck that feels more refined than purely utilitarian.

Other model years to consider

• 2024 GMC Sierra 3500HD

  • Average price: $68,734.00
  • Good/great deal percentage: 30.6%
  • User rating: 5 / 5
  • Total listings: 1,296

• 2025 GMC Sierra 3500HD

  • Average price: $76,288.00
  • Good/great deal percentage: 29.7%
  • User rating: 5 / 5
  • Total listings: 1,228

• 2023 GMC Sierra 3500HD

  • Average price: $57,661.00
  • Good/great deal percentage: 29.9%
  • Total listings: 1,174

This analysis is based on CarGurus' proprietary market data from August 10, 2026, CarGurus experts' opinions, and generative AI.