Used 2024 GMC Sierra 2500HD for Sale nearLondon, ON

How much does the 2024 GMC Sierra 2500HD cost?

Prices have softened 5.61% compared to this time last year, making it a favourable time to shop this model year.

There are 212 listings available, which suggests you should have a reasonable amount of inventory to compare.

Is the 2024 GMC Sierra 2500HD a good car?

Generally — 4.2/5 from owners and 8/10 from experts. The model scores 9/10 across Technology and Safety.

Owners consistently praise its capability, impressive features, and professional-grade feel, and they also see strong value in what it offers. The main trade-offs are limited colour choices and concerns around gas-engine reliability over time, especially carbon buildup issues.

That lines up with the Sierra 2500HD’s use case as a heavy-duty truck for buyers who want serious towing and hauling ability with a more premium cabin than many rivals. With 30.2% of listings marked as good or great deals, the market also gives you some room to shop selectively.

Is the 2024 GMC Sierra 2500HD reliable?

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

The owner feedback points to a truck that feels capable and dependable in day-to-day use, with buyers appreciating its professional-grade character and the confidence that comes from its strong feature set. The expert assessment also highlights a powertrain that feels refined and well matched to heavy-duty work, with smooth acceleration and a transmission that does not hunt for gears.

If you plan to keep one for the long haul, the main ownership risk is that heavy-duty use and diesel complexity can make maintenance and repair costs more important to watch closely on a used example.

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

Key things to evaluate:

• Trim level: The Denali Ultimate is the most luxurious version, with a massive cabin, luxury trimmings, standard LED lighting, sequential turn signals, and the MultiPro Tailgate. Lower trims are less lavish, so you should check whether the features you want are standard or optional before you buy.
• Powertrain: The Denali Ultimate uses a 6.6-litre Duramax turbocharged diesel V8 with 470 horsepower and 975 lb-ft of torque, paired with a 10-speed Allison automatic transmission and standard 4WD. It also adds 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: The Sierra HD comes standard with automatic emergency braking, forward collision warning, pedestrian detection, and lane departure warning. On the Denali Ultimate, front and rear parking sensors, a surround-view parking camera, adaptive cruise control, rear cross-traffic alert, blind-spot monitoring, and a rear-facing cargo bed camera are standard.
• Infotainment: The Denali Ultimate gets a 13.4-inch screen, a 15-inch multi-colour head-up display, wireless Apple CarPlay and Android Auto, wireless device charging, Google built-in, a 12-speaker Bose surround-sound audio system, and split-screen navigation.
• Fuel efficiency: During long highway stints, the Duramax diesel dipped as low as 11.2 litres per 100 kilometres, while suburban and city driving routinely climbed well beyond 20 L/100 km.

Which 2024 GMC Sierra 2500HD trim should I buy?

The 2024 GMC Sierra 2500HD is offered in 7 trim levels: Pro, SLE, SLT, AT4, Denali, AT4X, Denali Ultimate.

Here's the short version:

• Pro: This is the entry point if you want the Sierra HD nameplate at the lowest cost, but you should expect a much simpler truck than the upper trims.
• SLE: This is the first step up if you want a more usable everyday heavy-duty truck without jumping straight to the luxury end of the range.
• SLT: This is the best-value choice for many buyers because it sits in the middle of the range and should give you a better balance of equipment and price than the top trims.
• AT4: Choose this if you want the off-road-oriented character mentioned in the lineup, along with the standard 4WD that comes from this trim upward.
• Denali: This is the trim to target if you want a more premium cabin and upscale feel without going all the way to the most expensive version.
• AT4X: This is the more upgraded off-road trim, so it makes sense if you want the tougher-looking, more capability-focused side of the Sierra HD lineup.
• Denali Ultimate: This is the one to buy if you want the most luxurious and fully loaded version, with nearly every available option and the strongest mix of comfort, tech, and towing hardware.

From AT4 upward, 4WD is standard, and Pro and SLE are the only trims available with a regular cab or double cab.

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

This is a moderate market for selective buyers, so you can shop with some confidence if you are willing to compare listings carefully.

• Deal availability: 30.2% of listings are priced as good or great deals.
• Inventory: There are 212 listings available.
• Price trend: Prices have softened 5.61% compared with last year.

If you find a listing below $76,712 CAD, 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 $77,658 CAD sits slightly below last year's $82,277 CAD.

That softer pricing trend can work in your favour if you are buying now, but it also means a future seller may need to be realistic about where the market has settled. Because the truck is already trading below its year-ago average, resale value will depend heavily on condition, trim, mileage, and how well the truck has been maintained.

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 9/10 safety score from our experts.

It comes standard with automatic emergency braking, forward collision warning, pedestrian detection, and lane departure warning. On the Denali Ultimate, front and rear parking sensors, a surround-view parking camera, adaptive cruise control, rear cross-traffic alert, blind-spot monitoring, and a rear-facing cargo bed camera are standard.

That means you get a strong base safety package, with the most advanced driver-assistance features concentrated in the top trim. If you are shopping lower trims, you should verify which of those features are included versus optional.

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:

• 30.2% of listings are priced as good or great deals.
• Price trend: Prices have softened 5.61% compared with last year.
• Owners rate it 4.2/5 — a solid satisfaction signal.
• The Denali Ultimate is newly added for 2024 and brings nearly every available option to the lineup.

The bottom line: If you want the most up-to-date version of this heavy-duty truck with the newest top trim and a softer used-market price than a year ago, the 2024 is the primary path to consider. If you are more price-sensitive, you may want to compare it carefully against older examples to see whether a lower purchase price outweighs the newer trim and feature set.

How does the 2024 GMC Sierra 2500HD compare to the 2024 Ford F-250 Super Duty?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.