Used 2024 GMC Sierra 2500HD for Sale nearNepean, ON

How much does the 2024 GMC Sierra 2500HD cost?

Prices have softened 6.67% compared to this time last year, making it a favourable time to shop this model year.

There are 210 listings available, which suggests you have a decent 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 user rating and an 8/10 expert rating. The model scores 9/10 across Technology and Safety.

Owners consistently praise its capability, impressive features, and professional-grade feel, along with the value it delivers for a heavy-duty truck. The main trade-offs are its thirst for fuel and its large size, which can make parking awkward.

For you, that means the Sierra 2500HD makes the most sense if you want a heavy-duty truck that feels more upscale than a basic workhorse and you actually need the towing and hauling strength that comes with that mission. With 32.4% of listings marked as good or great deals, there is still 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.

Owners describe it as capable and impressive, and the feedback points to a truck that many buyers feel good about living with over time. The expert drive notes also highlight a high degree of refinement from the Duramax diesel powertrain, with smooth acceleration and a transmission that does not hunt for gears.

The main long-term ownership risk for used buyers is that heavy-duty diesel trucks can be expensive to keep in top shape, so service history matters a lot.

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

Key things to evaluate:

• Trim level: The Denali Ultimate adds nearly every available option and brings standard LED headlights and taillights, sequential turn signals, the MultiPro Tailgate, and a six-passenger Crew Cab layout. Lower trims do not get the same luxury treatment, so you should compare equipment carefully if you want the upscale cabin experience.
• Powertrain: The 2024 Sierra 2500HD is powered exclusively by 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 is built for towing and hauling, not light-duty use.
• Safety package: The Sierra HD includes 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, wireless Apple CarPlay and Android Auto, Google built-in, a 15-inch multi-colour head-up display, wireless device charging, and a 12-speaker Bose surround-sound system. Lesser Sierra HD models make do with an 8.0-inch touchscreen.
• Fuel efficiency: During long highway stints, the Duramax diesel dipped as low as 11.2 litres per 100 kilometres, while suburban and city driving could climb 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, and Denali Ultimate.

Here's the short version:

• Pro: This is the entry point if you want the Sierra HD’s core heavy-duty capability without paying for luxury extras. It makes sense if your priority is work-first utility and you plan to add only the options you truly need.
• SLE: This is the trim to consider if you want a more balanced mix of equipment and value than the Pro, while still keeping the truck focused on hard use rather than luxury.
• SLT: This is the better fit if you want a more upscale cabin and more comfort-oriented equipment without jumping all the way to the premium trims.
• AT4: This is the off-road-oriented choice in the lineup, and it suits you if you want a tougher-looking, more rugged heavy-duty truck with standard 4WD from this point up.
• Denali: This is the trim to target if you want a clear step up in refinement and premium feel, but do not need the full luxury loadout of the top model.
• AT4X: This is the upgraded off-road trim, so it is the one to look at if you want the more rugged character and equipment that come with the AT4X name.
• Denali Ultimate: This is the best-value choice only if you want the most luxurious Sierra 2500HD experience and are willing to pay for it. It adds the biggest screen, the richest tech suite, the most advanced trailering tools, and the full luxury treatment.

From AT4 up, 4WD is standard, so lower trims are the ones where you should pay closest attention to drivetrain and equipment differences.

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 leverage if you are patient.

• Deal availability: 32.4% of listings are priced as good or great deals.
• Inventory: There are 210 listings available.
• Price trend: Prices have softened 6.67% compared with last year.

If you find a listing below $76,681 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 $77,798 CAD sits slightly below last year's $83,363 CAD.

That softer pricing suggests the market has moved in buyers' favour, which can make it harder for a future seller to command top dollar right away. If you buy at a sensible price now and keep the truck in strong condition, you may be better positioned when it comes time to resell.

Heavy-duty trucks with strong capability and premium trim appeal can still hold attention well, especially when they are well equipped and properly maintained. The current price trend also shows that buyers are still willing to pay for the right example, even if the market has cooled a bit.

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.

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.

That means you should pay close attention to trim level if safety equipment matters to you, because the top trim bundles in the most complete driver-assistance package. The extra-large power-operated side mirrors also help visibility, which is useful in a truck this size.

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:

• 32.4% of listings are priced as good or great deals.
• Price trend: Prices have softened 6.67% 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, making this the most luxurious Sierra HD yet.

The bottom line: If you want the most up-to-date version of the Sierra 2500HD with the newest top trim and a softer used-market price than last year, the 2024 is the one to target. If you are more price-sensitive, you can still find value by focusing on lower trims or shopping carefully for a well-priced example.

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 3, 2026, CarGurus experts' opinions, and generative AI.