Used 2018 GMC Terrain for Sale near Arizona

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 $12,430
• 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: $12,430 (updated weekly)
• MPG/MPGe: 26 city / 30 hwy
• Inventory: 326 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: $13,269 (updated weekly)
• MPG/MPGe: 24 city / 28 hwy
• Inventory: 1,901 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 balance of luxury and practicality without going for the top trim. It includes premium features at a reasonable price.

• Avg. market price: $14,276 (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 sporty performance and all-wheel drive. It's the most popular trim, offering a great blend of features.

• Avg. market price: $14,895 (updated weekly)
• MPG/MPGe: 24 city / 28 hwy
• Inventory: 2,018 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 and all-wheel drive. It offers a unique diesel option for better mileage.

• Avg. market price: $14,510 (updated weekly)
• MPG/MPGe: 28 city / 38 hwy
• Inventory: 14 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 premium experience with diesel efficiency. It combines luxury with great fuel economy.

• Avg. market price: $16,987 (updated weekly)
• MPG/MPGe: 28 city / 38 hwy
• Inventory: 11 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 luxury features in a compact SUV. It offers a refined experience without going to the larger models.

• Avg. market price: $16,329 (updated weekly)
• MPG/MPGe: 22 city / 28 hwy
• Inventory: 171 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 luxury SUV with all-weather capability. It combines upscale features with performance.

• Avg. market price: $16,912 (updated weekly)
• MPG/MPGe: 21 city / 26 hwy
• Inventory: 1,150 listings — widest selection in the lineup
• View Denali AWD listings

Trim Recommendations

Most Popular — SLT AWD

With 2,018 active listings, the SLT AWD is the clear volume leader in the lineup.

Browse SLT AWD listings

Best Budget Option — SLE

At $12,430 avg market price — below the lineup median of $14,702 — 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 city / 38 hwy MPG/MPGe.

Browse SLE Diesel AWD listings

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

How much does the 2018 GMC Terrain cost?

Prices have softened 9.54% compared to this time last year, making it a favorable time to shop this model year.

There are 1,809 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 4.71/5 user rating, and our experts give it a 6.17/10 overall score. 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. Many also describe it as smooth and enjoyable to drive, with the 2.0L turbo engine drawing especially positive feedback.

For you, that means the Terrain can make sense if you want a compact crossover with a roomy cabin and a more feature-rich feel, especially if you value comfort over outright polish. It also has 31.3% good or great deals in the market, which gives you some room to shop selectively.

Is the 2018 GMC Terrain reliable?

Owners rate it 4.71/5, a strong signal of long-term satisfaction.

The owner feedback points to a vehicle that many people find dependable in day-to-day use, with comfort and feature variety standing out as recurring strengths. Reviewers also describe it as smooth and enjoyable to drive, which supports the sense that it can be a trouble-free companion for regular commuting and family use.

The expert evaluation also emphasizes that the Terrain can feel solid and easy to live with, especially when equipped with the stronger 2.0L turbo engine. For used buyers, the main long-term ownership risk is less about basic durability and more about whether you end up with a version that feels underpowered or overpriced for its condition and equipment.

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

At 63.7% 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 a lot of equipment. Focus on overall condition, signs of prior bodywork, and whether the features you want are actually present on the specific trim you’re looking at.

Key things to evaluate:

• Trim level: The Terrain is offered in four trim levels: SL, SLE, SLT, and Denali. The SL is the most stripped-down version, with only FWD, the 1.5-liter engine, and limited paint choices, while higher trims add more comfort and convenience equipment. If you want the best value, the SLE is the minimum starting point, since the SL is too limited for most shoppers.
• Powertrain: You can choose among 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 2.0-liter is the stronger choice if you want quicker, more satisfying performance, while the 1.5-liter is the standard engine and the diesel is part of the lineup.
• Safety package: Standard Teen Driver technology lets parents set limits and review vehicle-use reports, and Rear Seat Reminder is also standard. 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 subscription services, a 4G LTE Wi-Fi hotspot, navigation, an SD card reader, and four USB data ports. Wireless device charging is included on Denali.
• Fuel efficiency: The 2.0-liter engine averaged 22.6 mpg in testing, and the 1.5-liter engine returned 23.3 mpg in earlier testing.

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 bare-bones entry point, with FWD, the 1.5-liter engine, and very limited choices. It keeps the price down, but it’s too stripped for most buyers, so it mainly makes sense if you’re chasing the lowest possible purchase price.
• SLE: This is the best-value trim for most shoppers because it gets you into the lineup without the SL’s severe limitations. It’s the minimum trim you should seriously consider if you want a usable mix of equipment and price.
• SLT: This is the better pick if you want more comfort and convenience features without jumping all the way to the top trim. It’s the right middle ground if you want the Terrain’s more premium feel.
• Denali: This is the most upscale version, with extra brightwork, premium leather, wireless charging, and the 7-speaker Bose audio system. It suits you best if you want the most feature-rich Terrain and are willing to pay 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?

The market looks selective rather than overheated, so you can shop carefully and still find opportunities.

• Deal availability: 31.3% of listings are priced as good or great deals.
• Inventory: There are 1,809 listings available.
• Price trend: Prices have softened 9.54% compared with last year.
• Clean inventory: 63.7% of listings are accident-free.

If you find a listing below $14,061, 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 $14,061 sits slightly below last year's $15,545.

That decline suggests the Terrain has lost some market value, which can work in your favor as a buyer but may be less encouraging if you’re thinking about future resale. If you buy now, you’re entering at a lower price point than owners saw a year ago, which can help cushion depreciation if the market stays steady.

For a future seller, the key question is whether your specific Terrain has the right trim, condition, and equipment to stand out. Higher satisfaction from owners can help support demand, but the model’s value story still depends heavily on how well it presents when you decide to sell.

Vehicles with strong owner satisfaction ratings, like this model year's 4.71/5, tend to retain buyer demand, which supports resale value over time.

Is the 2018 GMC Terrain safe?

The 2018 Terrain gets a mediocre 3-star rating for rear seat side-impact protection from NHTSA, and an overall four-star rating.

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

Standard Teen Driver technology lets you set vehicle limits and review usage 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.

That rear-seat side-impact result is the main safety caveat you should keep in mind, especially if you plan to carry kids or other passengers in the back seat 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:

• 31.3% of listings are priced as good or great deals.
• At 63.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 9.54% compared with last year.
• Owners rate it 4.71/5 — a strong satisfaction signal.
• The 2018 Terrain stands out for its roomy cabin, available 2.0L turbo power, and standard Teen Driver and Rear Seat Reminder technology.

The bottom line: The 2018 Terrain makes the most sense if you want a lower-priced used compact crossover with a comfortable cabin and plenty of available features, and you’re willing to shop carefully for condition and equipment. If you’re especially price-sensitive, this year’s softer pricing can be appealing; if safety confidence is your top priority, you may want to compare it closely with other model years before buying.

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