How much does the 2020 GMC Sierra 2500HD cost?

Prices have softened 5.28% compared to this time last year, making it a favorable time to shop this model year.

There are 1,141 listings available, which suggests you have a solid amount of inventory to compare.

If you find a listing below $48,788.51, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2020 GMC Sierra 2500HD a good car?

Yes — the 2020 GMC Sierra 2500HD earns a 4.86/5 user rating and an 8.17/10 expert rating. The standout strength is Form and function at 10/10.

Owners consistently praise its performance, comfort, towing capabilities, and power, and they also highlight its appealing features. The truck’s broad capability and upscale feel come through clearly in the feedback, especially for buyers who want serious utility without giving up a more premium experience.

The trade-offs are just as clear: the expert review calls out poor value for money and interior materials that feel cheap. In practical terms, that means you should expect a truck that excels at work and towing, but not one that fully delivers on luxury-truck polish.

For shoppers who need heavy-duty capability, plenty of cargo space, and a more upscale presentation than many rivals, it fits the brief well. With 31.0% of listings marked as good or great deals, there are still opportunities to shop selectively.

Is the 2020 GMC Sierra 2500HD reliable?

Owners rate it 4.86/5, a strong signal of long-term satisfaction.

The owner summary points to a truck that feels dependable in daily use, with repeated praise for performance, comfort, towing, and power. That kind of feedback usually matters most when you’re looking for a heavy-duty truck you can count on over time.

The expert review also reinforces that sense of durability by emphasizing the truck’s serious work capability and its ability to handle demanding towing and hauling tasks. On the ownership side, the main risk for used buyers is paying for a truck that may have been worked hard, so condition and maintenance history matter a lot.

What should I look for when buying a used 2020 GMC Sierra 2500HD?

At 73.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and then prioritize a thorough inspection of the truck’s body, frame, and towing-related hardware. Because this is a heavy-duty pickup, you’ll want to focus on signs of hard use, uneven wear, and any evidence that the truck spent its life doing serious work.

Pay close attention to how the cabin and exterior have held up, since the expert review notes that fit and finish and interior materials are not especially strong points. If you’re shopping a truck that may have been used for towing or hauling, condition matters as much as equipment.

Key things to evaluate:

• Trim level: The base truck comes standard with a V8 engine and a 7-inch touchscreen with Apple CarPlay and Android Auto, but frills are minimal. The SLE adds 17-inch aluminum wheels, two-tier trailering mirrors, body-color door handles, tinted glass, stainless steel belt-line moldings, an EZ lift-and-lower tailgate, a 4.2-inch driver-information screen, a 4G LTE WiFi hotspot, cruise control, carpeted floor covering, remote keyless entry, and a leather-wrapped steering wheel.
• Powertrain: The truck offers two 6.6-liter V8 options: a gas engine with 401 horsepower and 464 pound-feet of torque, and a Duramax diesel with 445 hp and 910 lb-ft. The gas engine uses a 6-speed automatic, while the diesel uses a 10-speed Allison transmission. The diesel delivers massive low-end power, but the truck remains large and has a poor turning radius.
• Safety package: Standard equipment includes front- and side-impact airbags, traction control, a reversing camera, and a tire pressure monitoring system. Driver Alert Package I adds front and rear parking sensors, blind-spot monitoring, and rear cross-traffic alert. Driver Alert Package II adds forward-collision avoidance, lane-departure warning, and automatic high beams.
• Infotainment: The standard setup is a 7-inch touchscreen running GMC Infotainment 3 with Apple CarPlay and Android Auto. The SLT and Denali trims upgrade to an 8-inch screen, and both are available with navigation. The Denali also adds an 8-inch color driver-information screen.
• Fuel efficiency: In combined driving, the truck returned 16.5 miles per gallon.

Which 2020 GMC Sierra 2500HD trim should I buy?

The 2020 GMC Sierra 2500HD is offered in 4 trim levels: Sierra, SLE, SLT, Denali.

Here's the short version:

• Base trim: The Sierra is the least equipped version, with minimal frills beyond the standard V8 engine and 7-inch touchscreen. It’s the one to skip if you want more comfort, convenience, or trailering-friendly features.
• Sweet-spot trim: The SLE is the value play because it adds useful everyday upgrades like trailering mirrors, remote keyless entry, cruise control, a WiFi hotspot, and a better driver-information display without jumping to premium-truck pricing.
• Premium/top trim: The Denali is the most luxurious choice, with a full leather interior, wood-grain inserts, navigation, wireless device charging, and a Bose premium sound system. It’s the best fit if you want the most upscale cabin and tech.
• Off-road trim: None is described here.

The safety-package note is simple: Driver Alert Package I adds parking sensors, blind-spot monitoring, and rear cross-traffic alert, while Driver Alert Package II adds forward-collision avoidance, lane-departure warning, and automatic high beams.

Is now a good time to buy a used 2020 GMC Sierra 2500HD?

This is a moderate market for selective buyers, so it makes sense to shop carefully and compare listings.

• Deal availability: 31.0% of listings are priced as good or great deals.
• Inventory: There are 1,141 listings available.
• Price trend: Prices have softened 5.28% compared with last year.
• Clean inventory: 73.5% of listings are accident-free.

If you find a listing below $48,788.51, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2020 GMC Sierra 2500HD's resale value?

The current average of $49,250 sits slightly below last year's $51,997.

That softer pricing can help you buy more truck for the money today, but it also means future resale gains may be more limited if the market stays under pressure. For a seller, the current trend suggests you may need to price competitively to move the truck quickly.

Even so, the Sierra 2500HD’s strong owner satisfaction helps support demand. Trucks with this kind of reputation tend to hold buyer interest better than models with weaker feedback, which can help resale over time.

Vehicles with strong owner satisfaction ratings, like this model year's 4.86/5, tend to retain buyer demand, which supports resale value over time.

Is the 2020 GMC Sierra 2500HD safe?

It earns an 8/10 safety score from our experts.

The truck’s size creates real maneuvering challenges, but the available camera coverage and trailering mirrors help reduce stress in tight spaces. Standard safety equipment includes front- and side-impact airbags, traction control, a reversing camera, and a tire pressure monitoring system.

Driver Alert Package I adds front and rear parking sensors, blind-spot monitoring, and rear cross-traffic alert, while Driver Alert Package II adds forward-collision avoidance, lane-departure warning, and automatic high beams. For a truck this large, those added systems are especially useful.

Should I buy a 2020 GMC Sierra 2500HD or consider a different year?

If you're weighing the 2020 against nearby model years, here's how to think about it:

Choose the 2020 if:

• 31.0% of listings are priced as good or great deals.
• At 73.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 5.28% compared with last year.
• Owners rate it 4.86/5 — a strong satisfaction signal.
• The 2020 model year combines serious towing capability, a premium-leaning Denali identity, and strong owner praise for performance and comfort.

The bottom line: If you want a heavy-duty truck with strong capability, upscale appeal, and solid owner satisfaction, the 2020 Sierra 2500HD is a good year to target. If you’re especially price-sensitive, focus on well-kept listings near the low end of the range and be selective about history and condition.

These recommendations are based on CarGurus' proprietary market data from August 21, 2026, CarGurus experts' opinions, and generative AI.