Used 2021 GMC Terrain for Sale nearMississauga, ON

How much does the 2021 GMC Terrain cost?

Prices have softened 18.29% compared to this time last year, making it a favourable time to shop this model year.

There are 300 listings available, which gives you a reasonable amount of choice while you compare prices and trims.

Is the 2021 GMC Terrain a good car?

Yes — the 2021 GMC Terrain earns a 5/5 user rating, which points to strong owner satisfaction. Drivers consistently praise its stylish interior, smooth ride, and strong value, and many also like its fuel efficiency and well-equipped feature set. For you, that makes it a sensible pick if you want a compact SUV that feels a bit more premium without giving up everyday practicality. With 25.7% of listings marked as good or great deals, there is still some room to shop selectively.

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 comfort and 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: 25.7% of listings are priced as good or great deals.
• Inventory: There are 300 listings available.
• Price trend: Prices have softened 18.29% compared with last year.

If you find a listing below $21,109 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 $21,117 CAD sits slightly below last year's $25,842 CAD.

That drop suggests the 2021 Terrain has become more affordable for buyers, which can make it harder for a future seller to command a premium unless the vehicle is especially well equipped or exceptionally clean. On the other hand, the lower entry price may help keep demand steady among shoppers looking for value. The model’s premium-leaning cabin and strong owner satisfaction can help support interest when you eventually 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:

• 25.7% of listings are priced as good or great deals.
• Price trend: Prices have softened 18.29% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,663 CAD, the 2022 costs more than the current year's $21,117 CAD average.
• It adds a rugged-looking AT4 trim with standard all-wheel drive.

The bottom line: If you want the better value today, the 2021 is the stronger starting point because it combines a lower average price with solid owner satisfaction. If you are willing to pay more for the 2022’s added trim variety and all-wheel-drive-focused appeal, that year may be worth a look, but price-sensitive buyers will likely find the 2021 easier to justify.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.