2018 GMC Terrain Recalls, Problems & MPG
NHTSA lists 5 safety recalls and 225 owner complaints for the 2018 GMC Terrain. The EPA rates it 23 to 32 MPG combined, depending on engine and drivetrain.
- Recalls
- 5
- Owner complaints
- 225
- Crashes / fires reported
- 14 / 1
- EPA combined
- 23–32 MPG
2018 GMC Terrain recalls
Power TrainOct 29, 2020 · NHTSA 20V668000+
Risk: Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress to a loss of propulsion, increasing the risk of a crash. A transmission fluid leak in the presence of an ignition source may increase the risk of fire.
Fix: GM will notify owners, and dealers will inspect the start-stop transmission accumulator and replace it if any bolts are missing, free of charge. The recall began December 15, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick Customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202313440.
General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC Acadia, and 2020 Cadillac XT6 vehicles. The start/stop accumulator endcap may have missing bolts.
Service Brakes, HydraulicAug 30, 2018 · NHTSA 18V576000+
Risk: A reduction of braking performance can increase the risk of a crash.
Fix: GM will notify owners, and dealers will bleed the vehicle's brake system, free of charge. The recall began October 11, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18279.
General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Equinox, Impala, Cruze, Volt and Bolt EV vehicles, GMC Terrain vehicles, Buick Lacrosse and Regal vehicles, Cadillac XTS and XTS Professional vehicles and 2018 Chevrolet Malibu vehicles. The rear brake caliper pistons may have an insufficient coating causing gas pockets to form, potentially reducing rear brake performance.
Fuel System, GasolineMay 31, 2018 · NHTSA 18V358000+
Risk: A damaged fuel line can create a fuel leak, increasing the risk of a fire.
Fix: GM will notify owners, and dealers will replace the high pressure fuel pump, and high pressure fuel pipe, free of charge. The recall began July 2, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18188.
General Motors LLC (GM) is recalling certain 2015-2018 GMC Canyon, 2016-2017 Buick Envision, 2016-2018 Chevrolet Colorado and Malibu, 2017-2018 GMC Acadia, 2018 Buick LaCrosse, Cadillac ATS, Chevrolet Equinox, and GMC Terrain vehicles. The high pressure fuel pump may detach from its mounting flange, possibly resulting in the pump damaging the high pressure fuel line.
Air BagsMay 24, 2018 · NHTSA 18V340000+
Risk: If the SDM becomes inoperative, it will not detect a crash or command the necessary air bag deployment, increasing the risk of injury in the event of a crash.
Fix: GM will notify owners, and dealers will reprogram the SDM with updated software, free of charge. The recall began June 29, 2018. Owners may contact GMC customer service at 1-800-462-8782. GM's number for this recall is 18179.
General Motors LLC (GM) is recalling certain 2018 GMC Terrain vehicles. The sensing diagnostic module (SDM) that senses a crash and deploys the necessary air bags may not power down correctly when the vehicle is shut off, causing it to be inoperative when the vehicle is restarted.
Power TrainAug 22, 2017 · NHTSA 17V516000+
Risk: If the front right intermediate drive shaft assembly separates while driving, the vehicle will lose propulsion, increasing the risk of a crash. If the assembly separates while parked on a grade, without the park brake engaged, the vehicle may move unintentionally, increasing the risk of a vehicle roll-away.
Fix: GM will notify owners, and dealers will replace the right front intermediate drive shaft assembly, free of charge. The recall began August 25, 2017. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 17329.
General Motors LLC (GM) is recalling certain 2018 Chevrolet Equinox and GMC Terrain vehicles and 2017-2018 GMC Acadia vehicles. The right front intermediate driveshaft may fracture and separate while driving.
Recall repairs are free. Enter your VIN at nhtsa.gov/recalls to see if yours still needs one.
Most reported 2018 GMC Terrain problems
Owner complaints to NHTSA by system. One complaint can name more than one system.
- Service Brakes83
- Engine55
- Power Train42
- Unknown or Other35
- Electrical System35
- Air Bags14
- Hydraulic13
- Fuel/Propulsion System12
2018 GMC Terrain gas mileage
EPA ratings for each version (city / highway / combined).
| Version | Engine | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|
| Terrain AWD | 1.6 L 4 cyl, Automatic 6-spd | 28 | 38 | 32 | $2,950 |
| Terrain FWD | 1.6 L 4 cyl, Automatic 6-spd | 28 | 39 | 32 | $2,950 |
| Terrain FWD | 1.5 L 4 cyl, Automatic 9-spd | 26 | 30 | 28 | $2,300 |
| Terrain AWD | 1.5 L 4 cyl, Automatic 9-spd | 24 | 28 | 26 | $2,450 |
| Terrain FWD | 2.0 L 4 cyl, Automatic 9-spd | 22 | 28 | 24 | $3,300 |
| Terrain AWD | 2.0 L 4 cyl, Automatic 9-spd | 21 | 26 | 23 | $3,450 |
Real-world mileage depends on how and where you drive. Logbay compares your actual MPG with these EPA numbers.
Questions
Does the 2018 GMC Terrain have any recalls?
Yes. NHTSA lists 5 recalls for the 2018 GMC Terrain, most recently for the power train (Oct 29, 2020). Recall repairs are free at a dealer; check your VIN at nhtsa.gov/recalls.
What are the most common 2018 GMC Terrain problems?
Owners filed 225 complaints with NHTSA. The most reported areas are service brakes (83), engine (55), power train (42).
What gas mileage does the 2018 GMC Terrain get?
The EPA rates the 2018 GMC Terrain at 23 to 32 MPG combined (best version: 28 city / 38 highway).
Sources: NHTSA recalls and owner complaints (api.nhtsa.gov), EPA fuel economy (fueleconomy.gov). Updated Oct 26, 2026. Complaint counts are unverified owner reports.