Used 2021 GMC Terrain for Sale nearNewmarket, ON

How much does the 2021 GMC Terrain cost?

Prices have softened 16.09% compared to this time last year, making it a favourable time to shop this model year.

There are 321 listings available, which suggests you should have a reasonable amount of inventory to compare.

Is the 2021 GMC Terrain a good car?

Yes — 5/5 is a strong user rating, and owners consistently point to the Terrain’s stylish interior, smooth ride, and strong value. The 2021 model also fits well if you want a practical compact SUV that feels a bit more premium than many rivals, with a roomy cabin and useful everyday features. Its appeal is strongest if you value comfort, a well-equipped interior, and an easygoing driving experience. With 27.7% of listings marked as good or great deals, there is still some market flexibility for shoppers.

Is the 2021 GMC Terrain reliable?

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

The owner feedback also highlights a dependable, trouble-free ownership experience, with many drivers describing it as a vehicle they can count on over time. That kind of response matters for used buyers because it suggests the Terrain has earned trust beyond the first few years of ownership. For you, that lowers the sense of long-term risk compared with a model that draws more mixed feedback.

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

This looks like a moderate, selective buyer’s market, so you can be choosy without expecting every listing to be a bargain.

• Deal availability: 27.7% of listings are priced as good or great deals.
• Inventory: There are 321 listings available.
• Price trend: Prices have softened 16.09% 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 $21,501 CAD sits slightly below last year's $25,625 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 a shopper paying closer to the upper end of the range. Strong demand for well-liked trims and clean examples should still support interest 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:

• 27.7% of listings are priced as good or great deals.
• Price trend: Prices have softened 16.09% 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 $21,501 CAD average.
• It adds a rugged-looking AT4 trim with standard all-wheel drive.

The bottom line: You should lean toward the 2021 if you want the better value and a broader chance of finding a deal. If you are willing to pay more for the 2022’s added trim variety and all-wheel-drive-focused appeal, that can make sense too, but price-sensitive buyers will likely find the 2021 the smarter starting point.

These recommendations are based on CarGurus' proprietary market data from September 11, 2026, CarGurus experts' opinions, and generative AI.