Independent · Not affiliated with NHTSA or any automaker MethodologyData sourcesData refreshed Oct 6, 2026

2021 GMC Terrain: Problems, Recalls and MPG

What this means

NHTSA lists 2 recall campaigns for the 2021 GMC Terrain, most recently filed May 2023. Owners have filed 36 complaints with NHTSA, most often about the engine. In NHTSA crash tests it earned 5 stars overall.

Data summary generated from official records. Methodology Data: NHTSA, DOT, EPA · Refreshed Oct 6, 2026
Caution Fewer than 50 complaints filed. With this few reports, patterns may not be meaningful.
Compare

Recalls (2)

NHTSA lists 2 recall campaigns for the 2021 GMC Terrain. Check whether yours was repaired with NHTSA's free VIN lookup ↗

Only NHTSA and your automaker know whether your specific car was repaired. PlainVIN shows every recall campaign listed for a model year, with the official text and how many cars have been fixed so far.

Check on NHTSA ↗
Listed for 2021 GMC Terrain. Not checked against your VIN.
Recall 23V339000 Filed May 11, 2023

Child Seat Anchors May Not Function/FMVSS 225

Child seat · vehicle latch anchor
Official NHTSA text
Summary
General 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."
Consequence
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.
Remedy
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.
84.2% repairedof 668,187 vehicles
Manufacturer report to NHTSA · Source: US DOT recall completion data, retrieved Oct 6, 2026
Check your VIN on NHTSA or ask a dealer to check campaign 23V339000
Listed for 2021 GMC Terrain. Not checked against your VIN.
Recall 21V612000 Filed Aug 5, 2021

Tire Tread Separation

Tires
Official NHTSA text
Summary
General 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.
Consequence
Tread separation can result in a loss of vehicle control, increasing the risk of a crash.
Remedy
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.
96.8% repairedof 9,597 vehicles
Manufacturer report to NHTSA · Source: US DOT recall completion data, retrieved Oct 6, 2026
Check your VIN on NHTSA or ask a dealer to check campaign 21V612000

PlainVIN shows public government records for education. It isn't a vehicle inspection or legal advice. Check your own VIN with NHTSA or your dealer.

Owner complaints (36)

36 complaints filed with NHTSA (owner reports, not verified findings). The engine is mentioned most often.

4involved a crash
0involved a fire
4injuries reported
0deaths reported

As reported by owners in their complaints. These are reports, not NHTSA findings.

Most-reported components

Complaints filed with NHTSA for the 2021 GMC Terrain, by component (top 10). One complaint can list several components, so these add up to more than 36.Source: NHTSA ODI owner complaints · Retrieved Oct 6, 2026 · Report a data error

How 2021 compares with other Terrain years

Best and worst Terrain years →
2017201820192020202120222023202420252026
This year (2021)Other yearsStill collecting reports

Counts are owner reports, not failure rates. Higher sales years tend to draw more reports. Owners are still filing reports for recent model years, so these counts will grow. Source: NHTSA ODI, retrieved Oct 6, 2026.

Crash tests: 5 stars overall

Overall★★★★★
Frontal crashDriver 5★ · Passenger 5★★★★★★
Side crashDriver 5★ · Passenger 5★★★★★★
Side pole★★★★★
RolloverRollover risk 18.5%★★★★☆
Front seat of a modern car with the seat belt buckled across the passenger seat
Compare fairly. Compare stars only between vehicles of similar size and weight. Ratings apply to the tested configuration.

Source: NHTSA 5-Star Safety Ratings (NCAP), 2021 GMC Terrain suv fwd, retrieved Oct 6, 2026.

Fuel economy: up to 27 mpg combined

27
mpg combined
25
city
30
highway
EPA annual fuel cost
$2,500
CO₂ tailpipe
329 g/mi
EPA class
Small Sport Utility Vehicle

What it costs you to run

$2,419per year
$202per month
556gallons a year

Miles ÷ 27 mpg × $4.354 (EIA US average regular, week of Oct 5, 2026, all taxes included). Source: EPA · EIA.

EPA label estimates from lab tests; your mileage will vary.

Specs by configuration

2021 GMC Terrain configurations with EPA data
Engine · transmissionDriveCity / Hwy / CombEPA $/yrCO₂ g/mi
1.5 L 4-cyl · 9-speed automaticFront-Wheel Drive25 / 30 / 27$2,500329
1.5 L 4-cyl · 9-speed automaticAll-Wheel Drive25 / 28 / 26$2,600342

Source: EPA fuel economy data, retrieved Oct 6, 2026. Configurations are listed when EPA and NHTSA records match.

Used blue SUV on a sunny dealer lot with its hood open and a clipboard on the fender

Looking at a 2021 Terrain for sale?

Print a one-page buyer's checklist: each recall campaign with a box to tick when the seller shows proof of repair, the top complaint areas to inspect, crash stars, MPG, and a link back to this page.

All Terrain years

Where to next

2021 GMC Terrain FAQ

How many recalls does the 2021 GMC Terrain have?

NHTSA lists 2 recall campaigns: 23V339000 (latch), 21V612000 (tire). Use NHTSA's VIN lookup to see whether a specific car was repaired.

What are the most common 2021 GMC Terrain problems?

Owners filed 36 complaints with NHTSA. Engine (10), Power train (8), Service brakes (8) are mentioned most. These are owner reports, not verified findings.

What mpg does the 2021 GMC Terrain get?

EPA rates the 1.5 L 4-cyl · 9-speed automatic version at 25 city, 30 highway and 27 combined mpg. Other configurations are listed in the fuel economy section.

What safety rating did the 2021 GMC Terrain get?

NHTSA rated the 2021 GMC Terrain suv fwd 5 stars overall, with 5 stars frontal, 5 stars side and 4 stars rollover (18.5% rollover risk).

How does the 2021 Terrain compare with other years?

Among the 2017–2021 GMC Terrain model years at least five years old, the 2021 drew the fewest complaints (36) and the 2018 the most (223). The 2021 drew 36. Counts are owner reports, not failure rates.

How this page was madeSources, processing, limits, review and changes

Processing

  • Complaints are counted per component. One complaint can list several, so component totals add up to more than the total.
  • Fuel cost = miles per year ÷ EPA combined mpg × EIA weekly price for your region.

Limitations

  • Complaint counts are owner reports, not verified findings or failure rates. There is no sales denominator.
  • Recall campaigns are listed for the model year. Only NHTSA and the automaker know whether a specific car was repaired.
  • Recent model years are still collecting reports.

Review

Data compiled automatically from the official files listed here.

Changelog

  • 2026-10-06 Data refreshed from the official files.
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