Used 2018 GMC Terrain for Sale near Maryland

Compare 2018 GMC Terrain Trims

The 2018 GMC Terrain offers a range of trims from budget-friendly options to sportier all-wheel-drive models, catering to various needs and preferences.

• Starting at $12,280
• Best MPG/MPGe: 28 city / 38 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 — "Who It's For"

The SLE is the pick for shoppers who want essential features without paying for extras. It's the most budget-friendly option in the lineup.

• Avg. market price: $12,280 (updated weekly)
• MPG/MPGe: 26 city / 30 hwy
• Inventory: 312 listings
• View SLE 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. It offers a solid mix of features and capability.

• Avg. market price: $13,532 (updated weekly)
• MPG/MPGe: 24 city / 28 hwy
• Inventory: 1,887 listings — widest selection in the lineup
• View SLE AWD listings

SLT — "Who It's For"

The SLT is the pick for shoppers who want a standard trim with added comfort features without going for the sportier options.

• Avg. market price: $13,546 (updated weekly)
• MPG/MPGe: 26 city / 30 hwy
• Inventory: 309 listings
• View SLT listings

SLT AWD — "Who It's For"

The SLT AWD is the pick for shoppers who want a sporty feel with all-wheel drive. It's the most popular trim in the lineup.

• Avg. market price: $15,187 (updated weekly)
• MPG/MPGe: 24 city / 28 hwy
• Inventory: 1,935 listings — widest selection in the lineup
• View SLT AWD listings

SLE Diesel AWD — "Who It's For"

The SLE Diesel AWD is the pick for shoppers who want fuel efficiency with all-wheel drive. It's a less common option with great mileage.

• Avg. market price: $14,072 (updated weekly)
• MPG/MPGe: 28 city / 38 hwy
• Inventory: 20 listings — lower availability; may limit negotiating room
• View SLE Diesel AWD listings

SLT Diesel AWD — "Who It's For"

The SLT Diesel AWD is the pick for shoppers who want a sporty feel with diesel efficiency. It's a unique option in the lineup.

• Avg. market price: $16,926 (updated weekly)
• MPG/MPGe: 28 city / 38 hwy
• Inventory: 22 listings — lower availability; may limit negotiating room
• View SLT Diesel AWD listings

Denali — "Who It's For"

The Denali is the pick for shoppers who want premium features without the all-wheel drive. It offers a luxurious experience in a standard package.

• Avg. market price: $16,134 (updated weekly)
• MPG/MPGe: 22 city / 28 hwy
• Inventory: 189 listings — lower availability; may limit negotiating room
• View Denali listings

Denali AWD — "Who It's For"

The Denali AWD is the pick for shoppers who want a premium experience with all-wheel drive. It's trail-ready with luxurious features.

• Avg. market price: $16,015 (updated weekly)
• MPG/MPGe: 21 city / 26 hwy
• Inventory: 1,119 listings — widest selection in the lineup
• View Denali AWD listings

Trim Recommendations

Most Popular — SLT AWD

With 1,935 active listings, the SLT AWD is the clear volume leader in the lineup.

Browse SLT AWD listings

Best Budget Option — SLE

At $12,280 avg market price — below the lineup median of $14,629 — it's the most accessible entry point.

Browse SLE listings

Best for Fuel Economy — SLE Diesel AWD

The SLE Diesel AWD offers the best fuel efficiency with 28/38 MPG/MPGe.

Browse SLE Diesel AWD listings

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

How much does the 2018 GMC Terrain cost?

Prices have softened 9.64% compared to this time last year, making it a favorable time to shop this model year.

There are 1,806 listings available, which gives you a solid pool of options to compare.

Is the 2018 GMC Terrain a good car?

Yes — the 2018 GMC Terrain earns a 4.7/5 user rating and a 6.2/10 expert rating. The model scores 8/10 across Performance and Form and function.

Owners consistently praise its comfort, spaciousness, and the variety of features available, especially in higher trim levels. The overview also points to a compact crossover that can still make sense if you want a conceptually appealing SUV with a roomy cabin and a smooth driving feel. Even so, the same feedback points to brake sensitivity, limited power in some situations, and pricing concerns, so it fits you best if comfort and equipment matter more than outright value or polish.

Good and great deals account for 29.4% of listings, which suggests there are still some attractive opportunities if you shop carefully.

Is the 2018 GMC Terrain reliable?

Owners rate it 4.7/5, a strong signal of long-term satisfaction.

The owner summary points to a vehicle that many people find comfortable, spacious, and enjoyable to live with over time, and it also highlights the 2.0L turbo engine as a particularly satisfying choice. That same summary uses reliability-minded language in describing the Terrain as a vehicle owners can count on for comfort and everyday use. The expert driving notes also suggest a dependable-feeling chassis and controls, with steering that is easy to manage and brake behavior that is generally predictable in normal driving.

If you buy used, the main long-term ownership risk is that the Terrain’s value and mechanical appeal depend heavily on condition, maintenance history, and engine choice.

What should I look for when buying a used 2018 GMC Terrain?

At 63.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and then prioritize a pre-purchase inspection, especially if you’re considering a higher-mileage example or one with multiple owners. Pay close attention to body condition, brake feel, interior wear, and whether the equipment on the specific listing matches what you expect from the trim level. Because pricing can climb quickly with options, it also helps to confirm that the features you want are actually present.

Key things to evaluate:

• Trim level: The lineup includes SL, SLE, SLT, and Denali. The SL is the most basic version, with FWD, the turbocharged 1.5-liter engine, and limited paint choices, while higher trims add more comfort, brightwork, and upscale equipment. The Denali stands out for its premium look and added features, but the lower trims make the biggest difference in how much equipment you get for the money.
• Powertrain: The Terrain offers a turbocharged 1.5-liter 4-cylinder gas engine, a turbocharged 1.6-liter diesel engine, and a turbocharged 2.0-liter gas engine. The 1.5-liter is the standard engine, but the 2.0-liter is the stronger and more satisfying choice if you want better performance.
• Safety package: Standard Teen Driver technology and Rear Seat Reminder are included. Other driver-assistance and collision-avoidance systems are mostly optional, and adaptive cruise control plus higher-speed automatic emergency braking are missing.
• Infotainment: The Terrain uses an 8-inch touchscreen with Apple CarPlay, Android Auto, OnStar services, a 4G LTE Wi-Fi hotspot, navigation, an SD card reader, and four USB ports. Wireless device charging is included on Denali.
• Fuel efficiency: The 2.0-liter test vehicle averaged 22.6 mpg, and the 1.5-liter engine was described as delivering disappointing fuel economy of 23.3 mpg.

Which 2018 GMC Terrain trim should I buy?

The 2018 GMC Terrain is offered in 4 trim levels: SL, SLE, SLT, and Denali.

Here's the short version:

• SL: This is the entry point, and it keeps the price lowest by sticking with FWD, the 1.5-liter engine, and very limited options. It makes sense only if you want the cheapest way into the model and can live with the bare essentials.
• SLE: This is the first trim that makes the Terrain feel more realistic for most shoppers, since the SL is too stripped down for many buyers. It is the best-value starting point if you want a usable mix of equipment without jumping too far in price.
• SLT: This trim is the better choice if you want more comfort and a more upscale feel without going all the way to Denali. It suits you if you care about a richer feature set and are willing to pay more for it.
• Denali: This is the top trim and the one that adds the most premium presentation, including extra brightwork, wireless charging, and the 7-speaker Bose sound system. It is the right pick if you want the most upscale Terrain and are comfortable paying for it.

Standard Teen Driver technology and Rear Seat Reminder are included, while many other driver-assistance features remain optional.

Is now a good time to buy a used 2018 GMC Terrain?

This is a moderate, selective buyer’s market, so you can shop with some leverage if you’re patient and focused.

• Deal availability: 29.4% of listings are priced as good or great deals.
• Inventory: There are 1,806 listings available.
• Price trend: Prices have softened 9.64% compared with last year.
• Clean inventory: 63.4% of listings are accident-free.

If you find a listing below $13,784, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 GMC Terrain's resale value?

The current average of $13,784 sits slightly below last year's $15,255.

That softer pricing suggests the Terrain has already absorbed a meaningful amount of depreciation, which can help future resale stability if you buy at the right price. If you choose a well-kept example and avoid overpaying for options that the market doesn’t strongly reward, you may have a better chance of limiting your loss later. The biggest resale advantage will likely come from condition, equipment, and how well the vehicle has been maintained.

Vehicles with strong owner satisfaction ratings, like this model year's 4.7/5, tend to retain buyer demand, which supports resale value over time.

Is the 2018 GMC Terrain safe?

The 2018 GMC Terrain earns a four-star overall rating from NHTSA, with a three-star rating for rear seat side-impact protection.

It earns a 5/10 safety score from our experts.

Standard Teen Driver technology lets you set vehicle limits and review driving reports, and Rear Seat Reminder is also standard. Most other driver-assistance and collision-avoidance systems are optional, and adaptive cruise control plus higher-speed automatic emergency braking are missing. The lower rear-seat side-impact result is the main safety caveat to keep in mind if you plan to carry passengers regularly.

Should I buy a 2018 GMC Terrain or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 29.4% of listings are priced as good or great deals.
• At 63.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.64% compared with last year.
• Owners rate it 4.7/5 — a strong satisfaction signal.
• The expert summary says the 2018 Terrain is a conceptually appealing compact crossover that falls apart under scrutiny, with a questionable value equation and safety concerns.

The bottom line: If you want a used Terrain and can find a clean, well-priced example, the 2018 can work as a comfort-first compact crossover. If you’re a price-sensitive buyer, you should be especially selective and compare it carefully against other years or alternatives, because the 2018’s value and safety tradeoffs are hard to ignore.

How does the 2018 GMC Terrain compare to the 2018 Chevrolet Equinox?

Our experts score the 2018 GMC Terrain 6.2/10 and the 2018 Chevrolet Equinox 7.2/10.

The Terrain and Equinox share the same 1.5L 170 hp engine, but the Equinox has the edge in highway fuel economy and a lower average used price. The Terrain counters with a slightly higher share of good and great deals and a more premium-feeling presentation, but the Equinox is the stronger overall value based on the scores and the spec sheet.

These recommendations are based on CarGurus' proprietary market data from October 21, 2026, CarGurus experts' opinions, and generative AI.