Used 2020 GMC Terrain for Sale nearSaint Louis, MO

Compare 2020 GMC Terrain Trims in Saint Louis, MO

The 2020 GMC Terrain offers a range of trims from budget-friendly options to more luxurious models, all with efficient engines and versatile drivetrains.

• Starting at $17,148
• Best MPG/MPGe: 26 city / 30 hwy
• Most Popular: SLE FWD

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 well-equipped SUV without breaking the bank. It's the most popular trim for its value.

• Avg. market price: $18,680 (updated weekly)
• MPG/MPGe: 26 city / 30 hwy
• Inventory: 41 listings
• View SLE FWD listings

SLE AWD — "Who It's For"

The SLE AWD is the choice for those seeking sporty performance and all-weather capability without a hefty price tag.

• Avg. market price: $19,644 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 19 listings — lower availability; may limit negotiating room
• View SLE AWD listings

SLT FWD — "Who It's For"

The SLT FWD is ideal for buyers wanting a touch of luxury with standard features, all while maintaining a reasonable price.

• Avg. market price: $18,754 (updated weekly)
• MPG/MPGe: 26 city / 30 hwy
• Inventory: 25 listings
• View SLT FWD listings

SLT AWD — "Who It's For"

The SLT AWD is perfect for those who desire luxury features and all-wheel drive without a significant price increase.

• Avg. market price: $17,148 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 24 listings
• View SLT AWD listings

Denali AWD — "Who It's For"

The Denali AWD caters to luxury seekers who want premium features and a powerful engine for a refined driving experience.

• Avg. market price: $21,185 (updated weekly)
• MPG/MPGe: 21 city / 26 hwy
• Inventory: 20 listings
• View Denali AWD listings

Trim Recommendations

Most Popular — SLE FWD

With 41 active listings, the SLE FWD is the clear volume leader in the lineup.

Browse SLE FWD listings

Best Budget Option — SLT AWD

At $17,148 avg market price — below the lineup median of $18,754 — it's the most accessible entry point.

Browse SLT AWD listings

Best for Fuel Economy — SLE FWD

The SLE FWD offers the best fuel efficiency in the lineup with 26/30 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 2020 GMC Terrain cost?

Prices have softened 10.59% compared to this time last year, making it a favorable time to shop this model year.

There are 2,100 listings available, which gives you a solid amount of inventory to compare.

Is the 2020 GMC Terrain a good car?

Generally — the 2020 GMC Terrain earns a 4.4/5 user rating, which points to strong owner satisfaction. Owners commonly praise its comfort and safety features, along with its spacious interior and economical performance. Many also like the luxurious feel and intuitive entertainment system, especially in the Denali model. For you, that makes it a good fit if you want a compact SUV with a more premium feel, a polished cabin, and a strong safety feature set. 34.1% of listings are priced as good or great deals, so there is still some room to shop selectively.

Is the 2020 GMC Terrain reliable?

Owners rate it 4.4/5, a solid signal of long-term satisfaction.

The owner feedback points to a dependable ownership experience, with repeated praise for comfort, safety, and economical performance. That kind of response suggests the Terrain can be a trouble-free choice for buyers who want a small SUV they can count on over time. For used buyers, the main long-term risk is less about the overall concept and more about finding a well-kept example with a clean history and consistent maintenance.

What should I look for when buying a used 2020 GMC Terrain?

At 64.7% 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 you are considering a higher-mileage or lower-priced listing. Focus on overall condition, signs of past repairs, and whether the cabin, electronics, and drivetrain feel consistent with the seller’s description.

Is now a good time to buy a used 2020 GMC Terrain?

This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you are patient and compare listings carefully.

• Deal availability: 34.1% of listings are priced as good or great deals.
• Inventory: There are 2,100 listings available.
• Price trend: Prices have softened 10.59% compared with last year.
• Clean inventory: 64.7% of listings are accident-free.

If you find a listing below $16,838, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2020 GMC Terrain's resale value?

The current average of $16,838 sits slightly below last year's $18,832.

That price movement suggests the Terrain has already absorbed a meaningful amount of depreciation, which can help you as a buyer today. If you plan to sell later, the softer current market means your future resale will depend heavily on condition, mileage, and how well the vehicle is documented. A clean history and strong maintenance record should matter more when it comes time to attract buyers.

Vehicles with solid owner satisfaction ratings, like this model year's 4.4/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2020 GMC Terrain or consider a different year?

If you're weighing the 2020 against nearby model years, here's how to think about it:

Choose the 2020 if:

• 34.1% of listings are priced as good or great deals.
• At 64.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 10.59% compared with last year.
• Owners rate it 4.4/5 — a solid satisfaction signal.

The bottom line: The 2020 Terrain is the right choice if you want a more polished compact SUV with strong owner satisfaction and a market that still offers some deal potential. If you are especially price-sensitive, you may also want to compare nearby years to see whether a lower-priced alternative gives you similar comfort and features for less money.

How does the 2020 GMC Terrain compare to the 2020 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.