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2018 GMC Terrain problems: engine and transmission complaints and recalls
43% of relevant owner complaints filed with NHTSA on the 2018 GMC Terrain are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 53% of the 1,790 model years we track (2010–2023).
Excludes 15 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 40%).
Does the 2018 GMC Terrain have engine problems?
Owner complaints say yes, as a model-year pattern. 90 of 208 relevant complaints filed with NHTSA about the 2018 GMC Terrain concern the engine, transmission or fuel system (43%), and the largest group is filed under engine (54). For comparison, the 2017 scores 82% and the 2019 scores 55%. On a test drive, check for stalling, loss of power, rough idle, oil consumption or a check-engine light. This describes the model year, not any one car: a well-maintained or already-repaired example can be fine, and a clean model year can still have a bad car in it.
Complaints by component
The years either side
Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.
How the 2018 compares with other GMC Terrain years
Of the 14 GMC Terrain years with enough complaints to score, the 2018 is the 3rd-best on engine and transmission share (43%). The worst is the 2017 (82%), the best the 2016 (40%). By volume, the 2018 drew 223 complaints (90 drivetrain), against 134 for the 2017 and 185 for the 2019.
GMC Terrain years to avoid and best years →
2010 Terrain problems · 2011 Terrain problems · 2012 Terrain problems · 2013 Terrain problems · 2014 Terrain problems · 2015 Terrain problems · 2016 Terrain problems · 2017 Terrain problems · 2018 · 2019 Terrain problems · 2020 Terrain problems · 2021 Terrain problems · 2022 Terrain problems · 2023 Terrain problems
The rest of the picture on the 2018 GMC Terrain
- The mileage where it happens. When owners of the 2018 GMC Terrain said the problem showed up, and the range most of them fell in.
- What the repair costs. Typical engine repair ranges, to price into your offer.
- Cleaner alternatives. Similar cars and nearby years with a better record.
- Up to 15 owner reports, with the ones about your car's own engine first.
- What to ask the seller and what to check on the test drive, for this car.
- Two cars side by side, if you are deciding between them.
What one owner reported
One of 90 drivetrain complaints. The full report shows up to 15, with quotes about the engine in the car you are looking at first.
2018 GMC Terrain transmission recalls
Yes. NHTSA lists 3 recall campaigns on the 2018 GMC Terrain involving the engine, transmission or fuel system, out of 5 in total. A recall is the manufacturer admitting a defect and paying to fix it; whether a specific car still has one open depends on its VIN, which the full report checks. The owner complaints above are a separate record and often point at problems that never became a recall.
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.
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…
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…
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.
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,…
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.
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…
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…
2 other recalls on this model year (airbags, lighting, brakes and the rest)
Source: NHTSA recall campaigns filed against this year, make and model. Checked October 3, 2026.
Checking one particular 2018 GMC Terrain? This page is about the model year. Accidents, title brands and odometer records belong to the individual car, and that is what a vehicle history report covers.
Get a history report from EpicVIN Before you pay: EpicVIN’s $1 offer is a 3-day trial (up to 5 reports) that renews at $49.99 a month unless you cancel. Other plans are listed under “View all our packages” at checkout. We may earn a commission if you buy through this link. It does not change what this page reports.Questions people ask about the 2018 GMC Terrain
Does the 2018 GMC Terrain have engine problems?
Owner complaints say yes, as a model-year pattern. 90 of 208 relevant complaints filed with NHTSA about the 2018 GMC Terrain concern the engine, transmission or fuel system (43%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
What is the most common problem with the 2018 GMC Terrain?
Going by NHTSA owner complaints, the most common problem filed against the 2018 GMC Terrain is service brakes: 83 of 223 complaints (37%) name it, followed by engine (54) and power train (41). A complaint can name more than one component, so these overlap. Engine, transmission and fuel-system complaints together make up 43% of the relevant total.
Is the 2018 GMC Terrain reliable?
On the engine and transmission, owner complaints point to a weak spot: 43% of relevant complaints filed with NHTSA concern the drivetrain (high signal). That is worse than 53% of the 1,790 model years we track. Among the 14 GMC Terrain years we score, it ranks 3rd-best. Complaint data describes the model year, not one car, and it says nothing about trim, paint or electronics outside the drivetrain; an independent inspection still decides it.
Are there engine or transmission recalls on the 2018 GMC Terrain?
Yes. NHTSA lists 3 recall campaigns on the 2018 GMC Terrain involving the engine, transmission or fuel system, out of 5 in total: 20V668000 (power train: automatic transmission), 18V358000 (fuel system, gasoline: delivery: fuel pump), 17V516000 (power train: driveline: driveshaft). Whether a specific car still has one open depends on its VIN.
Which GMC Terrain years are better?
Among the GMC Terrain years we track, the 2015 (40%) and the 2016 (40%) have a lower engine and transmission complaint share than the 2018 (43%). Manufacturers fix things mid-generation, so the year before or after can be a different car. Every year side by side: https://thelanecheck.com/cars/gmc-terrain
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Check a VINExperimental model-level information. This is not a vehicle inspection, vehicle-history report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition of any individual vehicle.