Used 2024 GMC Sierra 2500HD for Sale nearLongmont, CO

How much does the 2024 GMC Sierra 2500HD cost?

Prices have softened 7.68% compared to this time last year, making it a favorable time to shop this model year.

There are 4,524 listings available, which gives you a solid amount of inventory to compare.

Is the 2024 GMC Sierra 2500HD a good car?

Generally — the 2024 GMC Sierra 2500HD earns a 4.2/5 from owners and an 8/10 from expert testing. The model scores 9/10 across Technology and Safety.

Owners consistently praise its capability, professional-grade feel, and value, while also highlighting its impressive features. In use, that lines up with the truck’s strong towing focus, upscale cabin, and work-ready equipment. The main trade-offs are its fuel thirst and its bulky feel when parking, and the near-twin Chevrolet Silverado HD is noted as being cheaper. For you, that means this makes the most sense if you want a heavy-duty truck that leans luxury and capability rather than a simpler, lower-cost workhorse.

36.5% of listings are priced as good or great deals, so there’s meaningful room to shop selectively.

Is the 2024 GMC Sierra 2500HD reliable?

Owners rate it 4.2/5, a solid signal of long-term satisfaction.

Owners describe it as capable and impressive, and the feedback points to a truck people feel good about living with over time. The expert drive data also emphasizes a refined powertrain and strong towing performance, which supports the sense that this is built for demanding use. The diesel setup is presented as robust and well matched to heavy-duty work, and the truck’s towing-focused hardware reinforces that impression. If you’re buying used, the main long-term ownership risk is making sure the truck has been maintained carefully, especially if you plan to use it for frequent towing or hard work.

What should I look for when buying a used 2024 GMC Sierra 2500HD?

Accident-free inventory is excellent at 91.6% — clean inventory, standard diligence applies.

You should still run a history report and prioritize a pre-purchase inspection, especially if the truck has been used for towing or heavy hauling. Focus on overall condition, signs of wear in the cabin and bed, and whether the truck’s equipment works as intended. Because this is a heavy-duty pickup, you’ll want to pay close attention to how it was used rather than just how it looks.

Key things to evaluate:

• Trim level: The Denali Ultimate is the top trim and comes with nearly every available option, including a luxury-oriented cabin, standard MultiPro Tailgate, and a six-passenger Crew Cab layout. It also gets standard LED headlights and taillights, sequential turn signals, and a choice of standard or long bed. If you want the most upscale version, this is the one to target.
• Powertrain: The Denali Ultimate uses a 6.6-liter Duramax turbocharged diesel V8 with 470 horsepower and 975 pound-feet of torque, paired with a 10-speed Allison automatic transmission and standard four-wheel drive. It also includes a locking rear differential, two-speed transfer case, all-terrain tires, heavy-duty air filter, underbody skid plates, hill descent control, and a diesel exhaust brake.
• Safety package: Standard equipment includes automatic emergency braking, forward collision warning, lane departure warning, front and rear parking sensors, a surround-view parking camera, pedestrian detection, rear cross-traffic alert, blind-spot monitoring, and a rear-facing cargo bed camera.
• Infotainment: The Denali Ultimate gets a 13.4-inch touchscreen, a 15-inch multi-color head-up display, wireless Apple CarPlay and Android Auto, wireless device charging, Google built-in, a 12-speaker Bose surround-sound system, and split-screen navigation.
• Fuel efficiency: During long highway stints, the Duramax diesel was observed returning as much as 21 miles per gallon, while suburban and city driving could dip into the single digits.

Which 2024 GMC Sierra 2500HD trim should I buy?

The 2024 GMC Sierra 2500HD is offered in 1 trim level: Denali Ultimate.

Here's the short version:

The Denali Ultimate is the clear choice if you want the most luxurious and most fully equipped version of the Sierra HD. It brings the strongest mix of upscale cabin materials, advanced tech, and heavy-duty towing hardware, and it’s the best-value pick only if you specifically want the top-end experience rather than a lower-priced work truck. Because it sits at the top of the lineup, you’re paying for nearly every available feature, so it suits you best if comfort and capability matter more than budget.

Is now a good time to buy a used 2024 GMC Sierra 2500HD?

This is a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile listings.

• Deal availability: 36.5% of listings are priced as good or great deals.
• Inventory: There are 4,524 listings available.
• Price trend: Prices have softened 7.68% compared with last year.
• Clean inventory: 91.6% of listings are accident-free.

If you find a listing below $65,619, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2024 GMC Sierra 2500HD's resale value?

The current average of $65,619 sits slightly below last year's $71,074.

That price movement suggests the market has already adjusted downward, which can help you as a buyer but may temper what a future seller can expect. If you own one for a few years, resale will likely depend heavily on condition, mileage, and how well the truck’s heavy-duty equipment has been maintained. Trucks with strong capability and premium trim content can still hold appeal, but the current trend shows that buyers are getting more negotiating room than they were a year ago.

Vehicles with solid owner satisfaction ratings, like this model year's 4.2/5, tend to retain buyer demand, which supports resale value over time.

Is the 2024 GMC Sierra 2500HD safe?

The 2024 GMC Sierra 2500HD earns a Top Safety Pick from IIHS and a five-star overall rating from NHTSA, with five-star ratings in frontal crash, side crash, and rollover tests.

It earns a 9/10 safety score from our experts.

Standard safety equipment includes automatic emergency braking, forward collision warning, lane departure warning, front and rear parking sensors, a surround-view parking camera, pedestrian detection, rear cross-traffic alert, blind-spot monitoring, and a rear-facing cargo bed camera. The large power-operated side mirrors also help visibility, especially when towing or maneuvering a wide truck. For you, the main takeaway is that this is a heavy-duty pickup with a strong safety feature set, though its size still demands extra care in tight spaces.

Should I buy a 2024 GMC Sierra 2500HD or consider a different year?

If you're weighing the 2024 against nearby model years, here's how to think about it:

Choose the 2024 if:

• 36.5% of listings are priced as good or great deals.
• Accident-free inventory is excellent at 91.6% — clean inventory, standard diligence applies.
• Price trend: Prices have softened 7.68% compared with last year.
• Owners rate it 4.2/5 — a solid satisfaction signal.
• The 2024 stands out for adding the Denali Ultimate as a newly available top trim with nearly every option and a diesel-powered towing focus.

The bottom line: If you want the newest nearby version with the strongest luxury-and-towing mix, the 2024 is the one to target. If your priority is stretching your budget further, a different year may give you more room to shop, but the 2024’s combination of softened pricing, strong inventory, and top-trim appeal makes it a compelling used buy.

These recommendations are based on CarGurus' proprietary market data from October 13, 2026, CarGurus experts' opinions, and generative AI.