Used 2021 GMC Terrain for Sale near Wisconsin

Compare 2021 GMC Terrain Trims

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

• Starting at $17,644
• 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: $17,708 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 1,544 listings — widest selection in the lineup
• View SLE FWD listings

SLE AWD — "Who It's For"

The SLE AWD is the pick for shoppers who want all-wheel drive without a hefty price tag, offering great value.

• Avg. market price: $18,845 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 1,885 listings — widest selection in the lineup
• View SLE AWD listings

SLT FWD — "Who It's For"

The SLT FWD is the pick for shoppers who want a standard trim with added comfort features without going over budget.

• Avg. market price: $17,644 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 825 listings
• View SLT FWD listings

SLT AWD — "Who It's For"

The SLT AWD is the pick for shoppers who want a sportier feel with all-wheel drive and premium features, making it the most popular choice.

• Avg. market price: $19,216 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 2,013 listings — widest selection in the lineup
• View SLT AWD listings

Denali FWD — "Who It's For"

The Denali FWD is the pick for shoppers who want luxury features in a standard configuration, though availability is limited.

• Avg. market price: $24,897 (updated weekly)
• MPG/MPGe: 25 city / 30 hwy
• Inventory: 53 listings — lower availability; may limit negotiating room
• View Denali FWD listings

Denali AWD — "Who It's For"

The Denali AWD is the pick for shoppers who want a premium experience with off-road capability, making it ideal for adventurous drivers.

• Avg. market price: $20,744 (updated weekly)
• MPG/MPGe: 25 city / 28 hwy
• Inventory: 1,140 listings — widest selection in the lineup
• View Denali AWD listings

Trim Recommendations

Most Popular — SLT AWD

With 2,013 active listings, the SLT AWD is the clear volume leader in the lineup.

Browse SLT AWD listings

Best Budget Option — SLT FWD

At $17,644 avg market price — below the lineup median of $19,030 — it's the most accessible entry point.

Browse SLT FWD listings

Best for Fuel Economy — SLE FWD

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

Browse SLE FWD listings

These recommendations are based on CarGurus' proprietary market data from September 2, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2021 GMC Terrain cost?

Prices have softened 9.78% compared to this time last year, making it a favorable time to shop this model year.

There are 2,567 listings available, which gives you a solid amount of inventory to compare.

If you find a listing below $18,332.56, that's toward the low end of the year-round range and worth acting on quickly.

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. The overview also fits that feedback: you get a comfortable daily driver with a roomy cabin for four adults, a large touchscreen, heated front seats, and a heated steering wheel.

If you want a compact SUV that leans into comfort, convenience, and value rather than maximum space or performance, this model year lines up well with that use case. 32.6% of listings are priced as good or great deals, so there are still worthwhile opportunities in the market.

Is the 2021 GMC Terrain reliable?

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

The user feedback points to a dependable ownership experience, with repeated praise for the smooth ride, value, and fuel efficiency. That kind of trouble-free reputation matters when you are shopping used, because it suggests the Terrain has been easy for owners to live with over time.

For you, the main long-term ownership risk is less about broad satisfaction and more about finding a well-kept example with no hidden issues.

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

At 74.5% 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 past damage. After that, prioritize a pre-purchase inspection, especially if the listing price looks unusually attractive.

Focus your inspection on overall condition, signs of prior repair, and whether the features and comfort equipment work as expected. Because this model is valued for its polished cabin and convenience features, you want to make sure the example you buy still feels well cared for.

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

This looks like a moderate, selective buyer’s market, with enough inventory to shop carefully and enough deal activity to reward patience.

• Deal availability: 32.6% of listings are priced as good or great deals.
• Inventory: There are 2,567 listings available.
• Price trend: Prices have softened 9.78% compared with last year.
• Clean inventory: 74.5% of listings are accident-free.

If you find a listing below $18,332.56, 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 $18,333 sits slightly below last year's $20,319.

That price movement suggests the market has softened, which can work against a future seller if you buy at the wrong point in the cycle. On the other hand, it also means you may be entering ownership at a more favorable price than buyers saw a year ago.

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:

• 32.6% of listings are priced as good or great deals.
• At 74.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.78% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

Consider the 2022 if:

• At $22,119, the 2022 costs more than the current year's $18,333 average.
• It adds an AT4 trim with standard all-wheel drive and a more rugged appearance.

The bottom line: If you want the better value, the 2021 is the stronger buy because it combines lower pricing with strong owner satisfaction. If you are willing to pay more for the newer model year and its added trim choice, the 2022 is the secondary path to consider.

These recommendations are based on CarGurus' proprietary market data from September 4, 2026, CarGurus experts' opinions, and generative AI.