Used 2020 GMC Sierra 2500HD for Sale nearNepean, ON

How much does the 2020 GMC Sierra 2500HD cost?

Prices are up 1.96% year-over-year — a sign of continued demand for this model year.

There are 48 listings available, which suggests a fairly limited pool of used examples.

Is the 2020 GMC Sierra 2500HD a good car?

Yes — the 2020 GMC Sierra 2500HD earns a 4.9/5 user rating, which points to strong owner satisfaction. Owners consistently praise its performance, comfort, and towing capabilities, and many also highlight its power and appealing features. For you, that makes it a strong fit if you want a heavy-duty pickup that still feels more upscale and refined than many rivals. With 39.6% of listings marked as good or great deals, there is still some room to shop carefully.

Is the 2020 GMC Sierra 2500HD reliable?

Owners rate it 4.9/5, a strong signal of long-term satisfaction.

The owner feedback points to a truck that many people find dependable in day-to-day use, especially when it comes to performance and towing confidence. That said, used buyers should still pay close attention to service history and condition, because long-term ownership risk can rise if known problem areas have not been addressed.

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

This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you are patient.

• Deal availability: 39.6% of listings are priced as good or great deals.
• Inventory: There are 48 listings available.
• Price trend: Prices are up 1.96% year-over-year.

If you find a listing below $53,234 CAD, 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 $56,094 CAD sits slightly above last year's $55,018 CAD.

That modest increase suggests the market has remained steady rather than softening. For a future seller, that can be a positive sign because it points to sustained buyer interest in this model year. The current pricing also sits within a relatively tight year-round band, which can help support resale confidence if your truck is well maintained and equipped.

Vehicles with strong owner satisfaction ratings, like this model year's 4.9/5, tend to retain buyer demand, which supports resale value over time.

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:

• 39.6% of listings are priced as good or great deals.
• Price trend: Prices are up 1.96% year-over-year.
• Owners rate it 4.9/5 — a strong satisfaction signal.

The bottom line: If you want a heavy-duty truck with a more premium feel, strong owner approval, and a reasonable amount of deal activity, the 2020 is the primary year to target. If you are more price-sensitive, a nearby year may be worth considering, especially if you can find a cleaner example with lower mileage or a better equipment mix.

How does the 2020 GMC Sierra 2500HD compare to the 2020 Ford F-250 Super Duty?

Read our full side-by-side expert comparison here.

These recommendations are based on CarGurus' proprietary market data from November 4, 2026, CarGurus experts' opinions, and generative AI.