Used 2021 GMC Terrain for SaleNationwide

How much does the 2021 GMC Terrain cost?

Prices have softened 13.70% compared to this time last year, making it a favourable time to shop this model year.

There are 293 listings available, which suggests a decent amount of inventory to compare before you buy.

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, feature set, smooth ride, and fuel efficiency. That lines up well with its role as a compact SUV for you if you want comfort, everyday usability, and a more premium feel than many rivals. With 34.5% of listings marked as good or great deals, there is also a healthy share of market-friendly options to consider.

Is the 2021 GMC Terrain reliable?

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

The user feedback also points to a dependable ownership experience, with drivers highlighting the Terrain’s smooth ride and overall value. That kind of praise usually matters most when you want a used SUV you can count on for daily driving without drama. For used buyers, the main long-term risk is less about outright reliability and more about choosing a well-kept example with the features and condition you want.

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 listings.

• Deal availability: 34.5% of listings are priced as good or great deals.
• Inventory: There are 293 listings available.
• Price trend: Prices have softened 13.70% compared with last year.

If you find a listing below $21,020 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 $21,385 CAD sits slightly below last year's $24,780 CAD.

That price movement suggests the Terrain has become more affordable for buyers, but it also means a future seller may face a softer market than last year. If you buy now, you may benefit from the lower entry price, though resale gains are unlikely to be driven by appreciation. 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:

• 34.5% of listings are priced as good or great deals.
• Price trend: Prices have softened 13.70% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $24,070 CAD, the 2022 costs more than the current year's $21,385 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 a lower purchase price. Consider the 2022 if you are willing to pay more for the newer model year and the added AT4 styling and equipment.

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 November 4, 2026, CarGurus experts' opinions, and generative AI.