Used 2020 GMC Sierra 2500HD for SaleNationwide

How much does the 2020 GMC Sierra 2500HD cost?

Prices are up 2.01% year-over-year — a sign of continued demand for this model year.

There are 50 listings available, which gives you a modest amount of inventory to compare before you buy.

Is the 2020 GMC Sierra 2500HD a good car?

Yes — the 2020 GMC Sierra 2500HD earns a 4.86/5 user rating, which points to strong owner satisfaction. Owners consistently praise its performance, comfort, and towing capability, and many also like its power and available features. That fits a heavy-duty pickup aimed at buyers who want serious truck capability with a more upscale feel. With 38.0% of listings marked as good or great deals, you still have some room to shop carefully.

Is the 2020 GMC Sierra 2500HD reliable?

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

The owner feedback also points to a truck that feels dependable in day-to-day use, with praise for its performance and towing strength. That said, used buyers should still budget for a careful inspection because long-term ownership risk can rise if you end up with a truck that has unresolved mechanical or electrical issues.

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 patiently and still find worthwhile listings.

• Deal availability: 38.0% of listings are priced as good or great deals.
• Inventory: There are 50 listings available.
• Price trend: Prices are up 2.01% year-over-year.

If you find a listing below $53,141 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 $55,851 CAD sits slightly above last year's $54,749 CAD.

That upward move suggests the market still places solid value on this model year, which can help support resale if you buy carefully. The fact that prices are holding above the prior-year average also suggests demand has remained steady rather than fading. If you plan to sell later, a well-kept example should still appeal to shoppers looking for a premium heavy-duty pickup.

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.

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:

• 38.0% of listings are priced as good or great deals.
• Price trend: Prices are up 2.01% year-over-year.
• Owners rate it 4.86/5 — a strong satisfaction signal.

The bottom line: If you want a heavy-duty pickup with a more premium feel and strong owner approval, the 2020 is a sensible target. If your priority is stretching your budget, you may want to compare nearby years and focus on the best-priced examples rather than the newest one you can find.

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