Used 2021 GMC Terrain for Sale nearSt Catharines, ON

How much does the 2021 GMC Terrain cost?

Prices have softened 16.10% compared to this time last year, making it a favourable time to shop this model year.

There are 310 listings available, which suggests you have a reasonable amount of inventory to compare.

Is the 2021 GMC Terrain a good car?

Yes — 5/5 is a strong user rating for this model year, and it lines up with the themes owners mention most often: a stylish interior, a smooth ride, and strong value. The 2021 Terrain also fits well if you want a practical compact SUV that feels a bit more premium than many rivals, with a roomy cabin and a well-equipped interior. For shoppers who want comfort and everyday usability without a plain feel, it makes a convincing case. With 28.7% of listings marked as good or great deals, there is still meaningful market choice if you shop carefully.

Is the 2021 GMC Terrain reliable?

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

The owner feedback also points to a dependable, trouble-free ownership experience, with drivers highlighting the Terrain’s smooth, easygoing character and strong value over time. That kind of response suggests you can count on it for regular use if you choose a well-kept example. For used buyers, the main long-term ownership risk is less about the model’s reputation and more about finding one that has been maintained properly.

Is now a good time to buy a used 2021 GMC Terrain?

This looks like a moderate, selective buyer’s market, so you can shop patiently and still find worthwhile options.

• Deal availability: 28.7% of listings are priced as good or great deals.
• Inventory: There are 310 listings available.
• Price trend: Prices have softened 16.10% compared with last year.

If you find a listing below $21,249 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 GMC Terrain's resale value?

The current average of $21,597 CAD sits slightly below last year's $25,740 CAD.

That price movement suggests the Terrain has already absorbed a meaningful amount of depreciation, which can help future sellers if the market stabilises. If you buy at the right price now, you may have less downside left than you would with a vehicle that is still dropping quickly. Strong owner satisfaction can also support demand when it is time to sell. Vehicles with strong owner satisfaction ratings, like this model year's 5/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2021 GMC Terrain or consider a different year?

If you're weighing the 2021 against nearby model years, here's how to think about it:

Choose the 2021 if:

• 28.7% of listings are priced as good or great deals.
• Price trend: Prices have softened 16.10% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,895 CAD, the 2022 costs more than the current year's $21,597 CAD average.
• It adds an AT4 trim with standard all-wheel drive and rugged styling.

The bottom line: Choose the 2021 if you want the better value and are focused on comfort, style, and everyday practicality. Consider the 2022 if you are willing to pay more for the newer model year and want its added rugged-themed trim. For price-sensitive buyers, the 2021 is the stronger starting point.

These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.