Used 2021 GMC Terrain for Sale nearDenver, CO

Compare 2021 GMC Terrain Trims in Denver, CO

The 2021 GMC Terrain offers a range of trims from budget-friendly options to well-equipped models, all featuring efficient engines and versatile drivetrains.

• Starting at $14,975
• Best MPG/MPGe: 25 city / 30 hwy
• Most Popular: SLT AWD

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

Missing data displayed as "—".

Trim Deep Dives

SLE FWD — "Who It's For"

The SLE FWD is the pick for shoppers who want a budget-friendly option without sacrificing essential features.

• Avg. market price: $14,975 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 6 listings — lower availability; may limit negotiating room
• View SLE FWD listings

SLE AWD — "Who It's For"

The SLE AWD is the pick for shoppers who want sporty performance and all-wheel drive without a hefty price tag.

• Avg. market price: $18,999 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 29 listings
• View SLE AWD listings

SLT AWD — "Who It's For"

The SLT AWD is the pick for shoppers who want premium features and all-wheel drive without breaking the bank.

• Avg. market price: $15,110 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 40 listings
• View SLT AWD listings

Denali AWD — "Who It's For"

The Denali AWD is the pick for shoppers who want luxury and advanced tech features in a compact SUV.

• Avg. market price: $15,547 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 12 listings — lower availability; may limit negotiating room
• View Denali AWD listings

Trim Recommendations

Most Popular — SLT AWD

With 40 active listings, the SLT AWD is the clear volume leader in the lineup.

Browse SLT AWD listings

Best Budget Option — SLE FWD

At $14,975 avg market price — below the lineup median of $15,328 — it's the most accessible entry point.

Browse SLE FWD listings

Best for Fuel Economy — SLE FWD

The SLE FWD offers the best fuel efficiency in the lineup with 25/30 MPG.

Browse SLE FWD listings

These recommendations are based on CarGurus' proprietary market data from November 12, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2021 GMC Terrain cost?

Prices have softened 11.83% compared to this time last year, making it a favorable time to shop this model year.

There are 2,344 listings available, which gives you a solid pool of options 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, feature set, smooth ride, and fuel efficiency. For you, that means it fits especially well if you want a compact SUV that feels comfortable, well equipped, and easy to live with rather than stripped-down or basic. The market also shows 34.3% of listings as good or great deals, which adds to its appeal for shoppers comparing value across used SUVs.

Is the 2021 GMC Terrain reliable?

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

User feedback highlights the Terrain as reliable, dependable, and trouble-free in everyday use, with owners especially appreciating its smooth ride and fuel efficiency. That kind of feedback suggests the vehicle has earned trust over time, not just initial enthusiasm. For used buyers, the main long-term ownership risk is less about broad reliability concerns and more about finding a well-kept example with a clean history and consistent maintenance.

What should I look for when buying a used 2021 GMC Terrain?

At 72.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report so you can separate clean examples from those with prior damage. After that, prioritize a thorough pre-purchase inspection, especially if the listing price looks unusually attractive. Focus on overall condition, signs of repair quality, and whether the cabin and exterior wear match the mileage and asking price.

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

This is a moderate, selective buyer’s market, so you have room to shop carefully and compare listings.

• Deal availability: 34.3% of listings are priced as good or great deals.
• Inventory: There are 2,344 listings available.
• Price trend: Prices have softened 11.83% compared with last year.
• Clean inventory: 72.4% of listings are accident-free.

If you find a listing below $17,479, 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 $17,479 sits slightly below last year's $19,824.

That price movement suggests the Terrain has become more affordable in the used market, which can help you buy at a better entry point today. For a future seller, the recent decline means resale value may be more sensitive to condition, mileage, and equipment level than to broad market momentum alone. If you keep the vehicle clean, well maintained, and documented, you improve your odds of standing out 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:

• 34.3% of listings are priced as good or great deals.
• At 72.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 11.83% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $20,875, the 2022 costs more than the current year's $17,479 average.
• It adds an AT4 trim with standard all-wheel drive and rugged styling.

The bottom line: If you want the better value today, the 2021 is the stronger starting point because it combines a lower average price with solid owner satisfaction and a decent share of good deals. If you are willing to pay more for a newer model year and the added AT4 option, the 2022 is the better secondary path for buyers who want that extra trim choice.

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 10, 2026, CarGurus experts' opinions, and generative AI.