Used 2021 GMC Terrain for Sale near Ontario

How much does the 2021 GMC Terrain cost?

Prices have softened 15.27% compared to this time last year, making it a favourable time to shop this model year.

There are 278 listings available, which suggests a modest amount of inventory for shoppers 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 consistently praise its stylish interior, strong feature set, smooth ride, and fuel efficiency. That lines up well with the Terrain’s role as a compact SUV that feels more premium than many rivals, while still offering a roomy cabin for everyday use. If you want a comfortable, well-equipped SUV for commuting and family duty, this model year fits that brief well.

With 32.4% of listings marked as good or great deals, you have a decent chance of finding a competitively priced example.

Is the 2021 GMC Terrain reliable?

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

The owner feedback points to a dependable ownership experience, with drivers highlighting the Terrain’s smooth ride, fuel efficiency, and overall value. That kind of praise usually suggests a vehicle people feel comfortable living with over time, especially when the day-to-day experience is trouble-free and easy to count on.

For used buyers, the main long-term risk is less about owner sentiment and more about choosing a well-kept example with a clean maintenance history.

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 if you’re not in a rush.

• Deal availability: 32.4% of listings are priced as good or great deals.
• Inventory: There are 278 listings available.
• Price trend: Prices have softened 15.27% compared with last year.

If you find a listing below $21,110 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 $21,453 CAD sits slightly below last year's $25,319 CAD.

That price movement suggests the Terrain has become more affordable in the used market, which can help you buy in at a lower cost today. For a future seller, it also means resale expectations should be set with the current softer market in mind rather than last year’s higher pricing. If demand stays steady, the Terrain’s value should remain supported by its broad appeal as a comfortable, well-equipped compact SUV.

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:

• 32.4% of listings are priced as good or great deals.
• Price trend: Prices have softened 15.27% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,571 CAD, the 2022 costs more than the current year's $21,453 CAD average.
• It adds an AT4 trim with a more rugged look and standard all-wheel drive.

The bottom line: Choose the 2021 if you want the better value and a strong owner-satisfaction story. Consider the 2022 if you’re willing to pay more for the newer-year pricing and the added rugged styling; otherwise, the 2021 is the smarter pick for price-sensitive buyers.

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