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 more luxurious models, all with solid fuel efficiency.

• Starting at $15,361
• 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: $15,361 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 41 listings
• 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: $18,336 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 66 listings
• View SLE AWD listings

SLT FWD — "Who It's For"

The SLT FWD is the pick for shoppers who want a touch of luxury without going for the top-tier trims.

• Avg. market price: $16,488 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 30 listings
• View SLT FWD listings

SLT AWD — "Who It's For"

The SLT AWD is the pick for shoppers who want a well-rounded SUV with luxury features and all-wheel drive.

• Avg. market price: $16,527 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 82 listings
• View SLT AWD listings

Denali AWD — "Who It's For"

The Denali AWD is the pick for shoppers who want premium features and a luxurious driving experience.

• Avg. market price: $16,932 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 48 listings
• View Denali AWD listings

Trim Recommendations

Most Popular — SLT AWD

With 82 active listings, the SLT AWD is the clear volume leader in the lineup.

Browse SLT AWD listings

Best Budget Option — SLE FWD

At $15,361 avg market price — below the lineup median of $16,527 — it's the most accessible entry point.

Browse SLE FWD listings

Best for Fuel Economy — SLE FWD

The SLE FWD offers the best fuel economy in the lineup at 25/30 MPG.

Browse SLE FWD listings

These recommendations are based on CarGurus' proprietary market data from September 17, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2021 GMC Terrain cost?

Prices have softened 9.42% compared to this time last year, making it a favorable time to shop this model year.

There are 2,525 listings available, which suggests solid inventory for comparison shopping.

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, feature set, smooth ride, and fuel efficiency. That makes it a good fit if you want a comfortable compact SUV that leans toward everyday usability and value rather than outright performance. The market also shows 32.0% of listings as good or great deals, which gives you some room to shop selectively.

Is the 2021 GMC Terrain reliable?

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

User feedback highlights a dependable-feeling ownership experience, with drivers often describing the Terrain as smooth, efficient, and easy to live with. The recurring praise for comfort and value suggests many owners feel confident keeping it over the long term. For used buyers, that kind of satisfaction can reduce ownership risk, especially if you verify maintenance and condition before you buy.

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

At 74.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should run a vehicle history report on any candidate and confirm whether prior damage was cosmetic or structural. Put inspection priority on body panels, paint match, tire wear, suspension feel, and any warning lights or electronic feature issues. Because the Terrain’s appeal depends heavily on comfort and equipment, focus on overall condition and how well the features work.

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 patient and still find a worthwhile listing.

• Deal availability: 32.0% of listings are priced as good or great deals.
• Inventory: There are 2,525 listings available.
• Price trend: Prices have softened 9.42% compared with last year.
• Clean inventory: 74.7% of listings are accident-free.

If you find a listing below $18,320, 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 $18,320 sits slightly below last year's $20,224.

That softer pricing can help you buy at a more favorable entry point, but it also means future resale gains may be more limited if the market stays soft. If you plan to sell later, condition and documentation will matter more because buyers will have plenty of comparable listings to choose from. A well-kept example should still hold appeal thanks to the Terrain’s comfort-focused reputation and broad everyday usefulness.

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:

• 32.0% of listings are priced as good or great deals.
• At 74.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.42% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $21,792, the 2022 costs more than the current year's $18,320 average.
• It adds an AT4 trim with standard all-wheel drive and a more rugged look.

The bottom line: If you want the better value, the 2021 is the stronger starting point because it combines lower pricing with strong owner satisfaction. If you’re willing to pay more for a newer model year and the AT4’s rugged styling, the 2022 is the secondary path to consider. For most price-sensitive buyers, the 2021 makes more sense unless you specifically want the newer year’s added trim appeal.

These recommendations are based on CarGurus' proprietary market data from September 22, 2026, CarGurus experts' opinions, and generative AI.