Used 2021 GMC Terrain for Sale nearOshawa, ON

How much does the 2021 GMC Terrain cost?

Prices have softened 16.30% compared to this time last year, making it a favourable time to shop this model year.

There are 276 listings available, which gives you a reasonable amount of inventory to compare.

Is the 2021 GMC Terrain a good car?

Yes — the 5/5 user rating points to strong owner satisfaction. Drivers consistently praise the stylish interior, the feature set, and the smooth ride, while also highlighting the Terrain’s value and fuel efficiency. For everyday use, its roomy cabin makes it a practical fit if you want a comfortable compact SUV that feels a bit more premium than many rivals. With 28.6% of listings marked as good or great deals, you have 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 points to a dependable, trouble-free ownership experience, with drivers repeatedly calling out the Terrain’s smooth ride and overall value. That kind of satisfaction usually suggests you can count on it for regular use without feeling like you’re taking a big gamble. For used buyers, the main long-term ownership risk is less about outright reliability and more about choosing a well-maintained example that still feels solid inside and out.

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

This is a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile opportunities.

• Deal availability: 28.6% of listings are priced as good or great deals.
• Inventory: There are 276 listings available.
• Price trend: Prices have softened 16.30% compared with last year.

If you find a listing below $21,175 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 $21,359 CAD sits slightly below last year's $25,517 CAD.

That price movement suggests the Terrain has become more affordable for buyers, which can make it easier to move later if you price it competitively. For a future seller, the softer market means you may need to be realistic on asking price to attract attention. On the positive side, the model’s broad appeal as a comfortable, well-equipped compact SUV should still help it draw interest from shoppers looking for value.

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:

• 28.6% of listings are priced as good or great deals.
• Price trend: Prices have softened 16.30% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,490 CAD, the 2022 costs more than the current year's $21,359 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 are focused on comfort, features, and owner satisfaction. Consider the 2022 if you want the newer trim choice and are willing to pay more for its added rugged styling. If price matters most, the 2021 is the smarter starting point.

These recommendations are based on CarGurus' proprietary market data from October 6, 2026, CarGurus experts' opinions, and generative AI.