2021 GMC Terrain: raw data

Every record we hold for this vehicle, as plain tables, with nothing added. The consumer page shows the same records with the maintenance schedule, price ranges and nearby shops around them.

vehicle2021 / gmc / terrain
known issues7 clusters (reviewed 2026-08-21)
complaints35 on file (2021-07-20 → 2026-09-11)
recalls2
investigations0
fars8 occupant deaths, crash years 2010-2024 (legacy-code)
indexedyes
licenseCC BY 4.0 (derived)

Known Issues clusters all years →

Brake pedal hardening and loss of braking abilitySERVICE BRAKES7 complaints2021-07 → 2026-07terrain-2021-brake-pedal-hardening
  • 11747599 When I applied the brakes the car would not stop. I had two 6 years old in the backseat. I applied 2 feet to the brake pedal and it was like a rock and the car would not slow down. I thought I was going to crash
  • 11431951 i WAS GOING TO MY SONS HOME WHICH IS LOCATED ON A STEEP DOWHILL STREET WITH SEVERAL TURNS, ONE OF THER ALMOST 90 DEGREES.aS i STARTED TO DESEND THE HILL AND GAIN SPEED, I DEPRESSED THE FOOT BRAKE. iT DID NOT RESPOND AT ALL
Reduced engine power mode and turbocharger failureENGINE, ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER5 complaints2025-07 → 2026-03terrain-2021-reduced-engine-power-turbo
  • 11712586 Was driving on the highway and the car threw a "reduced engine power" warning and went into limp mode. Check engine light came on. Car asymptomatic prior. got the code pulled and it said turbocharger under boost
  • 11724745 Vehicle went into reduce engine power mode and check engine light came on. Vehicle has just over 60,000 miles. Code is telling me I need a new turbo and being quoted $1,500-$3,000
Transmission shudder, erratic shifting, and gear selector faultsPOWER TRAIN6 complaints2021-07 → 2026-04terrain-2021-transmission-shudder-shift
  • 11434563 When driving up hill or going around corner transmission shudders so bad that it feels like front tires are coming off. I contacted the dealer and gm and was told there is a tsb for this complaint. GM and dealer acknowledged there was a problem but they didn't have a fix or…
  • 11734629 Automatic transmission solenoid control valve body got stuck open and ruined the whole transmission. This has been a reoccurring problem with these vehicles. Image is from a code read. Issue was confirmed by Gastorf Chevrolet, and an independent transmission shop
Automatic emergency braking unintended activationFORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING2 complaints2023-05 → 2025-07terrain-2021-aeb-unintended-activation
  • 11537561 Automatic Emergency brakes have unnecessarily or prematurely activated on 2 separate occasions causing my car to stop very abruptly which has resulted in Neck, Shoulder and back pain. I have been very lucky in the recent past and today that a vehicle was not directly behind me
  • 11670483 I changed lanes into the right lane when the vehicle abruptly, without notification, and with force, caused braking that unexpectedly and dangerously slowed the vehicle then released braking before doing the same a moment later
Fuel system faults and vehicle stallFUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP, ENGINE3 complaints2023-09 → 2025-04terrain-2021-fuel-system-stall
  • 11652800 The contact stated while driving 5 MPH, the vehicle stalled. There was no warning light illuminated. The contact stated that the failure was like GM Product Safety Recall: N222372310 (Inadequate Fuel Pump Flow). The vehicle was towed to an independent mechanic, who determined…
  • 11543018 The contact stated upon pressing the Push to Start button, the vehicle failed to start after several attempts, and the battery drained. The vehicle was towed to the dealer, but the failure could not be duplicated
Infotainment screen blackout and electrical system faultsELECTRICAL SYSTEM3 complaints2021-12 → 2024-02terrain-2021-infotainment-screen-blackout
  • 11447976 While driving my vehicle and talking on the phone, the radio screen went black. Bluetooth or nothing in connection to it was working. After about 2 hours it came back on. I was told to bring to dealership to be checkout, but it came back on
  • 11490163 every now and then the information screen will go black for a while then turn back on could be a few seconds or several minutes. 23,900 on car
Water intrusion into cabin and cargo areasUNKNOWN OR OTHER1 complaints2025-08 → 2025-08terrain-2021-water-intrusion-mold
  • 11678054 Constantly have water leaking into spare tire compartment, back seat floors and passenger floor. Mold/mildew smell coming through vents. Have had drains lines cleaned out, and still recurring having this issue. Unknown where leak is coming from

NHTSA complaints (summary) all years →

countearliest_datelatest_datecrash_flaggedfire_flaggedtop_components
352021-07-202026-09-1140ENGINE:9; SERVICE BRAKES:8; POWER TRAIN:8; ELECTRICAL SYSTEM:7; UNKNOWN OR OTHER:3

Recalls all years →

campaign_numberreport_received_datecomponentsummaryconsequenceremedy
21V61200005/08/2021TIRESGeneral Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and GMC Terrain vehicles equipped with certain Hankook tires. The tires may have been manufactured with an insufficient amount of curative agent, which could cause tread separation.Tread separation can result in a loss of vehicle control, increasing the risk of a crash.Dealers will inspect the tire DOT numbers, and replace any affected tires, free of charge. Owner notification letters were mailed on August 31, 2021. Owners may contact GMC customer service at 1-800-462-8782; and Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N212343560.
23V33900011/05/2023CHILD SEAT:VEHICLE LATCH ANCHORGeneral Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles. The four rear-seat lower child seat LATCH anchorage bars may have excessive powder coating, which could prevent a child seat from being installed with the anchorage bars. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child Restraint Anchorage Systems."The inability to install a child seat with the LATCH anchorage bars could result in an unsecured child seat, increasing the risk of injury in a crash.Owners are advised to install child seats using the vehicle's rear seat belts until the remedy is complete. Dealers will inspect the latch anchorage bars, and remove and replace the finish, as necessary, free of charge. Owner notification letters were mailed June 2, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232403240.

Investigations all years →

none listed

FARS occupant deaths all years →

crash_yearsoccupant_deathsmatch_typevpic_recovered
2010-20248legacy-code0

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road.

Cite this

Derived data is CC BY 4.0. Link back to the page you used. Text and BibTeX below.

Wrench.Pro (2026). 2021 GMC Terrain vehicle data [dataset]. https://www.wrench.pro/data/vehicles/2021/gmc/terrain
@misc{wrenchpro_2021_gmc_terrain_2026,
  author = {Wrench.Pro},
  title = {Wrench.Pro vehicle data: 2021 GMC Terrain},
  year = {2026},
  howpublished = {\url{https://www.wrench.pro/data/vehicles/2021/gmc/terrain}},
  note = {Derived from NHTSA public records. CC BY 4.0.}
}

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