Used 2021 GMC Terrain for Sale near Thornhill, ON

How much does the 2021 GMC Terrain cost?

Prices have softened 14.47% compared to this time last year, making it a favourable time to shop this model year.

There are 303 listings available, which suggests you should have a reasonable amount of inventory to compare.

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 repeatedly praise its stylish interior, strong feature set, smooth ride, and fuel efficiency. That lines up well if you want a compact SUV that feels a bit more premium than many rivals and works well for everyday use. The roomy cabin also helps if you value passenger comfort over maximum cargo space.

With 34.7% of listings marked as good or great deals, you have a meaningful share of the market to shop from.

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 ride and overall value. That kind of response suggests you can count on it for regular commuting and day-to-day use.

For used buyers, the main long-term ownership risk is less about outright reliability and more about making sure the specific vehicle 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: 34.7% of listings are priced as good or great deals.
• Inventory: There are 303 listings available.
• Price trend: Prices have softened 14.47% compared with last year.

If you find a listing below $21,018 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 $21,417 CAD sits slightly below last year's $25,038 CAD.

That price movement suggests the Terrain has already absorbed a meaningful amount of depreciation, which can be helpful if you buy now and plan to sell later. If the market stays steady, a lower entry price can reduce the amount you lose to depreciation over your ownership period. Strong owner satisfaction can also help support demand when it is time to resell.

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:

• 34.7% of listings are priced as good or great deals.
• Price trend: Prices have softened 14.47% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,356 CAD, the 2022 costs more than the current year's $21,417 CAD average.
• It adds an AT4 trim with standard all-wheel drive and a more rugged appearance.

The bottom line: The 2021 is the better value if you want a well-liked compact SUV at a lower used price. If you are willing to spend more for a newer model year and the added AT4 trim, the 2022 is the secondary path to consider.

How does the 2021 GMC Terrain compare to the 2021 Chevrolet Equinox?

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

These recommendations are based on CarGurus' proprietary market data from October 27, 2026, CarGurus experts' opinions, and generative AI.