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2018 GMC Terrain

Research, photos, specs, and expertise

GMC Terrain highlights

Customer reviews

4.7 out of 5

RepairPal reliability rating

4.5 out of 5


  • Comfortable and upscale interior
  • Infotainment touchscreen is are intuitive and easy to use
  • Good driver aids


  • Complete package of driver aids remains optional
  • 1.5-liter turbocharged engine disappoints with power, fuel economy and refinement
  • Less cargo space behind the back seat than in most competitors

Mileage (EPA estimate)

28 city, 39 highway, 32 combined

Pricing for current inventory

(no current inventory)


Sleek and upscale new design headline the 2018 GMC Terrain

The 2018 GMC Terrain is the first year for a complete redesign of this compact SUV. The sleek new styling reflects GMC’s ruggedly handsome design themes, and the interior features upscale touches like a stitched dash and modern and easy-to-use technology.

The Terrain’s three available powertrains include a torquey diesel, great for those who seek more power pulling away from stoplights or passing on the highway. The diesel also has the best fuel economy of the Terrain’s engine trio, which also includes a standard lackluster 1.5-liter four-cylinder and more sporting 2.0-liter four-cylinder.

Seemingly aimed at road trippers, the Terrain’s firm and supportive front seats and overall quiet interior make it a good choice for long hauls. Cargo space can be expanded for long items with a fold-flat front passenger seat for long items. We like the touchscreen interface, and the standard Apple CarPlay® and Android Auto™ smartphone integration, but unfortunately some interior controls are frustrating to use, particularly the gear-selector buttons that are oddly placed low on the dash.

All GMC Terrain years

New for 2018

  • Terrain trims have been upgraded with Smart Key, Heated Steering Wheel, Automated Parking, Full Roof Rack, Turbo Charged Engine, Turbo Diesel Engine, Android Auto, Apple CarPlay, BOSE Sound System, and Navigation System as standard equipment this year.
  • Panoramic Sunroof, Rear Seat Heaters, and A/C Seat(s) features are now available as options on select trims.
  • The SLT trim now comes with Cloth Seats, Memory Seat(s), and Power Hatch/Deck Lid as standard equipment.
  • The Denali trim now comes with Cloth Seats as standard equipment.
  • The SLE trim now comes with Front Seat Heaters, Remote Start, and Power Hatch/Deck Lid as standard equipment.

Explore GMC Terrain details

SLT 2WD 4D Sport Utility

Standard Features

  • ABS Brakes
  • Air Conditioning
  • Alloy Wheels
  • AM/FM Stereo
  • Android Auto
  • Apple CarPlay
  • Automatic Transmission
  • Auxiliary Audio Input
  • Bluetooth Technology
  • Cloth Seats
  • Cruise Control
  • Front Seat Heaters
  • Leather Seats
  • Overhead Airbags
  • Power Locks
  • Power Mirrors
  • Power Seat(s)
  • Power Windows
  • Rear Defroster
  • Rear View Camera
  • Remote Start
  • Satellite Radio Ready
  • Side Airbags
  • Smart Key
  • Traction Control
  • Turbo Charged Engine

Optional Features

  • Blind Spot Monitor
  • BOSE Sound System
  • Full Roof Rack
  • Heated Steering Wheel
  • Lane Departure Warning
  • Leather Seats
  • Memory Seat(s)
  • Navigation System
  • Panoramic Sunroof
  • Parking Sensors
  • Power Hatch/Deck Lid
  • Running Boards
  • Tow Hitch

Drive type


Engine size




Torque (ft-lbs)


Engine type

Turbo Gas

Fuel capacity




Overall length






Leg room

F 40.9"/R 39.7"

Head room

F 40"/R 38.5"

Front tires


Rear tires


Seating capacity


Max towing capacity

150/1500 lbs.



5 reasons to buy the 2018 GMC Terrain

What We Like:

Technology: With big colorful icons, the Terrain’s standard touchscreen is easy to use, and the standard Apple CarPlay® and Android Auto smartphone integration fit perfectly with the high-tech feel. Every GMC Terrain comes standard with four USB ports, with higher trim levels adding two more. The Terrain also comes standard with automatic emergency braking and forward-collision alert, lane-departure warning and lane-keep assist, and even automatic high beams. However, we suggest looking for models with the optional Driver Alert Package II (SLT and up), which adds adaptive cruise control and blind-spot monitoring with rear cross-traffic alert.

Interior Comfort: Road trippers will like the Terrain’s interior comfort. The firm and supportive front seats are great for long drives, and the side cushions manage to hold you in place without intruding when getting in and out of the vehicle. Topping it off are low overall noise levels.

Cargo Flexibility: We admit it’d be nice if the cargo area was bigger, but the Terrain makes up for it with excellent flexibility. The available hands-free power tailgate (SLT and up) is activated by sweeping a foot under the rear bumper for easy access. Like its competitors the rear seatbacks fold flat, but the front passenger seat also folds flat, making it easy to accommodate extra-long items like a kayak. It even has a hard plastic back to avoid damaging the upholstery.

What Needs Improvement

Interior Controls: As comfortable as the interior is, GMC’s placement of some controls has us scratching our heads. Chief among these are the buttons for the transmission gear selector. They’re located low on the dash, and while you could argue long-term owners will get used to the placement, we’d prefer something closer to the driver and more intuitive to use.

Ratings & reliability

Customer ratings

RepairPal reliability rating


RepairPal gave the GMC Terrain an overall reliability rating of 4.5 out of 5 stars, which RepairPal describes as Excellent. This rating ranks GMC Terrain 9th out of 27 among Compact SUVs.

View RepairPal's full rating of the GMC Terrain

2018 GMC Terrain trims

More about the 2018 GMC Terrain

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