Used 2018 GMC Acadia for Sale near Washington

How much does the 2018 GMC Acadia cost?

Prices have softened 11.16% compared to this time last year, making it a favorable time to shop this model year.

There are 2,741 listings available, which suggests you have a solid amount of inventory to compare.

Is the 2018 GMC Acadia a good car?

Yes — the 2018 GMC Acadia earns a 4.79/5 user rating and a 7.17/10 expert rating. The model scores 8/10 across Form and function and Safety.

Owners consistently praise the spacious, comfortable interior, the roomy family-friendly layout, and the useful feature set. The overview also points to a three-row crossover that balances improved handling, braking, and fuel economy with more versatility, which makes it a strong fit if you want family duty without giving up a more carlike driving feel.

The market also looks reasonably supportive, with 30.6% of listings marked as good or great deals.

Is the 2018 GMC Acadia reliable?

Owners rate it 4.79/5, a strong signal of long-term satisfaction.

The owner feedback points to a dependable-feeling, family-friendly vehicle with a comfortable cabin and a layout many shoppers can count on for everyday use. The expert notes also emphasize that the Acadia’s broader versatility improved when V6 power became available to more trims, which helps it feel more capable for long-term ownership.

The main ownership risk for used buyers is making sure you choose a well-maintained example, since condition and prior use will matter more than the badge alone.

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

At 61.7% 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 or lower-priced example. Focus on overall condition, signs of prior bodywork, and whether the vehicle has been used in a way that matches your needs.

Key things to evaluate:

• Trim level: The base SL trim is the most stripped-down version, with the 2.5-liter engine and front-wheel drive only, while higher trims add more comfort, convenience, and safety equipment. The SLE trim unlocks all-wheel drive and the V6 option, and the SLT and Denali trims add progressively more premium features.
• Powertrain: The 2.5-liter four-cylinder is described as inadequate for anything beyond commuter duty, while the 3.6-liter V6 is the stronger choice for towing, hauling, or carrying a full family. Both engines use a 6-speed transmission that can feel lurchy at low speeds and sluggish at highway speeds.
• Safety package: The Driver Alert I package adds blind-spot monitoring, lane-departure warning, rear cross-traffic alert, and rear parking sensors. The Driver Alert II package adds lane-keep assist, auto high beams, front parking sensors, and low-speed forward-collision warning with auto braking, and the IIHS recognition depends on that package.
• Infotainment: The base setup includes a 7-inch touchscreen with Intellilink, Android Auto, Apple CarPlay, and a 4G LTE Wi-Fi hotspot. Higher trims add an 8-inch touchscreen, navigation, and virtual gauges.
• Fuel efficiency: The 2.5-liter engine returns 21 mpg city and 26 highway, while the 3.6-liter V6 returns 17 mpg city, 25 highway, and 20 combined.

Which 2018 GMC Acadia trim should I buy?

The 2018 GMC Acadia is offered in 6 trim levels: SL, SLE, SLT1, SLT2, Denali, and All-Terrain.

Here's the short version:

• SL: This is the entry point, and it gives you the essentials: the 2.5-liter engine, front-wheel drive, a 7-inch touchscreen, Android Auto, Apple CarPlay, tri-zone climate control, keyless ignition and entry, and a Wi-Fi hotspot. It makes sense if you want the lowest-cost way into the Acadia, but it’s the least flexible choice.
• SLE: This is the best-value starting point if you want more capability, because it unlocks all-wheel drive and the V6 option. It also adds LED running lights and satellite radio in SLE1 form, while SLE2 brings heated power front seats, a power liftgate, roof rails, remote start, and standard second-row captain’s chairs.
• SLT1: This is the sweet spot for many shoppers because it adds leather upholstery, power lumbar support, an upgraded driver display, a Bose stereo, and the Driver Alert I safety package. If you want a more premium feel without jumping to the top end, this is the trim to target.
• SLT2: This trim builds on SLT1 with 20-inch wheels, a trailering package, heated second-row seats, lane-keep assist, auto high beams, front parking sensors, and low-speed forward-collision warning with auto braking. It’s the right pick if you want more towing and safety tech.
• All-Terrain: This version adds 20-inch wheels, roof rails, hill descent control, and an advanced twin-clutch AWD system. It suits buyers who want a more rugged setup, but it’s still a family crossover rather than a true off-road SUV.
• Denali: This is the luxury choice, with an 8-inch touchscreen, navigation, virtual gauges, heated and ventilated front seats, a heated steering wheel, xenon headlights, polished 20-inch wheels, a hands-free liftgate, and unique styling. It’s the most upscale Acadia, but it also carries the highest price.

The safety-package trim note is simple: the IIHS recognition depends on the Driver Alert II package, and the Denali-only adaptive cruise with full-speed auto braking is a notable extra.

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

This looks like a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile listings.

• Deal availability: 30.6% of listings are priced as good or great deals.
• Inventory: There are 2,741 listings available.
• Price trend: Prices have softened 11.16% compared with last year.
• Clean inventory: 61.7% of listings are accident-free.

If you find a listing below $15,476, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 GMC Acadia's resale value?

The current average of $15,476 sits slightly below last year's $17,420.

That price movement suggests the Acadia has already absorbed a meaningful amount of depreciation, which can help future sellers if they buy at the right price today. If you purchase near the lower end of the current range and keep the vehicle in strong condition, you may have a better chance of limiting your loss later.

Vehicles with strong owner satisfaction ratings, like this model year's 4.79/5, tend to retain buyer demand, which supports resale value over time.

Is the 2018 GMC Acadia safe?

The 2018 GMC Acadia was named a Top Safety Pick by the IIHS when equipped with the Driver Alert II package, and it earns five-star ratings in frontal collision tests and four-star ratings in all other NHTSA tests.

It earns an 8/10 safety score from our experts.

The safety tech is strongest when you move up to the Driver Alert packages. Driver Alert I adds blind-spot monitoring, lane-departure warning, rear cross-traffic alert, and rear parking sensors, while Driver Alert II adds lane-keep assist, auto high beams, front parking sensors, and low-speed forward-collision warning with auto braking.

The caveat is that the best safety recognition depends on equipment, so you should verify whether the specific used example has the right package before you buy.

Should I buy a 2018 GMC Acadia 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:

• 30.6% of listings are priced as good or great deals.
• At 61.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 11.16% compared with last year.
• Owners rate it 4.79/5 — a strong satisfaction signal.
• The V6 is now available to more trims, improving versatility and everyday drivability.

Consider the 2017 if:

• At $13,122, the 2017 costs less than the current year's $15,476 average.
• It’s smaller, lighter, and more efficient after the redesign.

Consider the 2019 if:

• At $17,186, the 2019 costs more than the current year's $15,476 average.
• It feels more upscale and refined inside.

The bottom line: The 2018 is the best all-around choice if you want a balanced mix of price, features, and improved V6 availability. If you’re especially price-sensitive, the 2017 can save you money, but the 2018 is the better target if you want the stronger, more versatile version of the Acadia.

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