Summary

• With 152 currently listed for sale near Phoenix, AZ and an average price of $75,011.00, 12.5% of 2025 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.

• Favorably reviewed: Owners rated the 2025 GMC Sierra 3500HD 5 / 5 stars.

• 97.4% of 2025 Sierra 3500HD models on CarGurus are accident free.

Why it stands out

The 2025 GMC Sierra 3500HD stands out as a heavy-duty truck that blends serious work capability with a more polished, upscale character than many buyers expect from a one-ton pickup. GMC describes the Sierra 3500HD as a “commercial grade” workhorse, and that identity shows in its towing and hauling focus, but the model also has a reputation for moving toward refinement, especially in its higher trims. For shoppers who want a truck that can do hard-duty jobs without feeling purely utilitarian, that balance is a major part of its appeal.

For 2025, the Sierra 3500HD includes a 6.6-liter V8 rated at 401 horsepower and 464 pound-feet of torque, plus a 6.6-liter Duramax turbodiesel V8 rated at 445 hp and 910 lb-ft of torque. Properly equipped, it can haul as much as 7,442 pounds of cargo and tow up to 35,500 pounds, and those maximum figures require the diesel engine, a single cab body, rear-wheel drive, a gooseneck hitch, and dual rear wheels. The truck is also offered in a wide range of cab, bed, and axle configurations, which helps it serve both commercial buyers and shoppers who need a highly specific setup.

The 2025 model also benefits from a broad feature spread. Even the base version includes a seven-inch infotainment touchscreen, Apple CarPlay and Android Auto, a trailer hitch receiver, and vinyl upholstery, while higher trims add conveniences such as the MultiPro tailgate, trailering assist features, heated front seats, a native navigation system, a wireless phone charger, and a larger touchscreen. Off-road and luxury buyers are both catered to, with the AT4 emphasizing hardware for rougher terrain and the Denali line leaning into premium materials and advanced equipment. The main tradeoff is size and cost: the Sierra 3500HD can be unwieldy in parking lots, top trims can be prohibitively expensive, and rivals typically can tow more.

Other model years to consider

• 2024 GMC Sierra 3500HD

  • Average price: $78,938.00
  • Good/great deal percentage: 20.3%
  • User rating: 5 / 5
  • Total listings: 128

• 2023 GMC Sierra 3500HD

  • Average price: $57,782.00
  • Good/great deal percentage: 22.1%
  • Total listings: 122

• 2017 GMC Sierra 3500HD

  • Average price: $20,995.00
  • Good/great deal percentage: 20.6%
  • User rating: 5 / 5
  • Total listings: 34

This analysis is based on CarGurus' proprietary market data from August 6, 2026, CarGurus experts' opinions, and generative AI.