Diagsheet

Model year 2018

2018 GMC Terrain

  • 219owner complaints
  • 5recalls
  • 14involved a crash
  • 30,000median miles at failure

Newest report Aug 28, 2026 · checked Sep 9, 2026

miles

When each problem shows up

Each bar covers the middle half of the mileages owners reported for that problem. A quarter saw it earlier, a quarter later. The tick is the median. Most reported: brakes grind, pulse or wear early, 80 complaints.

0k25k50k75k100k125k150kyou
Transmission shudders, slips or shifts hard12 reports
Infotainment, screen or backup camera fails18 reports

middle half of reports, median tick. Darker bars have 75 or more reports.

Behind you

    Around your mileage

      Ahead of you

        How this compares

        2018 GMC Terrain219
        Median 2018 model here (85 vehicles)281
        Median 2018 SUV here (43)330

        219 complaints is 1.3 times fewer than the median 2018 model on this site and 1.5 times fewer than the median 2018 SUV. Among the 7 Terrain model years here it ranks 3rd for complaints. Counts follow sales volume as much as reliability, so a truck that sells 700,000 a year draws more reports than a sedan that sells 200,000.

        Complaints filed by year

        217
        2418
        2819
        1120
        1721
        2722
        2823
        3624
        2525
        2126

        36 complaints came in 2024. Owners file in waves when a problem gets press or an investigation, so a spike measures attention as much as failures.

        Recalls that include the 2018 GMC Terrain

        Whether your car is included depends on its VIN. Check yours at nhtsa.gov/recalls.

        20V-668Oct 29, 2020
        Power Train:Automatic Transmission

        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 and remedy
        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.
        Remedy: 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.
        18V-576Aug 30, 2018
        Service Brakes, Hydraulic:Foundation Components:Disc:Caliper

        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.

        Risk and remedy
        Risk: A reduction of braking performance can increase the risk of a crash.
        Remedy: 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.
        18V-358May 31, 2018
        Fuel System, Gasoline:Delivery:Fuel Pump

        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 and remedy
        Risk: A damaged fuel line can create a fuel leak, increasing the risk of a fire.
        Remedy: 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.
        18V-340May 24, 2018
        Air Bags: Air Bag/Restraint Control Module

        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.

        Risk and remedy
        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.
        Remedy: 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.
        17V-516Aug 22, 2017
        Power Train:Driveline:Driveshaft

        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 and remedy
        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.
        Remedy: 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.

        Other model years