The 2021 GMC Terrain has 34 NHTSA owner complaints and 2 recalls on file (U.S. federal records, as of September 2026). The most-reported system is powertrain at 7 complaints (~$2,500 to repair). Source: NHTSA Office of Defects Investigation.
Solid reliability overall. Common issues are concentrated in a few systems.
0
Critical
2
Severe
0
Moderate
Should you avoid this 2021 Terrain?
Generally reliable
Buyable on the data — keep up the usual maintenance and inspect normally.
No systemic severe-failure pattern in the complaint record
Reliability score 8.0/10 — above the segment average
2 recall campaigns on file
Our read of the federal NHTSA complaint and recall record for this exact year and model —
not a substitute for a pre-purchase inspection. How we score.
NHTSA crash-test safety ratings
5 / 5 overall
Overall★★★★★5/5
Frontal crash★★★★★5/5
Side crash★★★★★5/5
Rollover★★★★★4/5
Driver-assist features on the tested model:
Electronic stability control: Standard · Forward collision warning: Standard · Lane departure warning: Standard
Source: NHTSA New Car Assessment Program — tested configuration: 2021 GMC Terrain SUV AWD. Stars rate crash protection in NHTSA's tests, not overall reliability — see the owner-complaint data below for what actually goes wrong.
Buying a used 2021 GMC Terrain? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or
make the seller fix it before you sign.
What to inspect on this specific car
powertrain — 7 owner reports
· ~$2,500 to fix
brakes — 6 owner reports
· ~$450 to fix
electrical — 5 owner reports
· ~$850 to fix
engine — 4 owner reports
· ~$3,100 to fix
⚠ The one to take seriously: brakes is flagged
severe on this model
.
Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — 2 active recalls on this model. Recall repairs are always free.
Verdict for buyers: 8.0/10 model. The priciest documented failure is
engine (~$3,100) — get the
seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report
tells you what this exact car has been through. Smart buyers get both.
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in
this vehicle's actual NHTSA record, not generic advice.
Dash light, leak, worn part — snap it and we'll read it against this car's record.
Photo attached — type a question or just hit Ask.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
Embed this reliability snapshot
Free to use on your site, post, or video — just keep the "Source" credit line below the chart. Preview the widget →
What owners are saying
recent NHTSA-filed complaints · verbatim
2021 Terrain· electrical
I dropped my son off at school and he mistakenly took my car keys into school with him, and somehow I was able to drive all the way home, 4.5 miles, with no key in the car and no warning to stating the remote wasn't in the car. The issue with this is if I'd driven further,…
Recently I have noticed that the back brakes squeak and sound like they are grinding when backing up. Also 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
When accelerating from a stop between 35-45 mph the steering wheel shakes and you feel a vibration coming from the front wheels. I thought the wheels were loose and were about to come off.
My 2021 gmc terrain with 6000 miles on odometer. 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…
Had a problem with your 2021 GMC Terrain?
File a complaint with NHTSA → It's free and official — owner filings are what build the federal safety record behind this page.
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
General Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles
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.
Fix: 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.
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and GMC Terrain vehicles equipped with certain Hankook tires
Tread separation can result in a loss of vehicle control, increasing the risk of a crash.
Fix: 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.
Common questions
Is the 2021 GMC Terrain reliable?
Mostly yes. With a reliability score of 8.0 out of 10 based on 34 owner complaints filed with NHTSA, the 2021 GMC Terrain is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2021 GMC Terrain?
On the NHTSA data, the 2021 GMC Terrain does not need avoiding. Buyable on the data — keep up the usual maintenance and inspect normally. The record behind that call: No systemic severe-failure pattern in the complaint record; Reliability score 8.0/10 — above the segment average; 2 recall campaigns on file. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2021 GMC Terrain?
Inspect the powertrain first — it's the most-reported issue on this model, with 7 owner complaints filed. Average repair cost runs about $2,500 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2021 GMC Terrain a good used car to buy?
It scores 8.0 out of 10 on our NHTSA-based read of 34 owner complaints. The main thing to watch is powertrain. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2021 GMC Terrain?
Based on NHTSA records, the most-reported issue is powertrain, with 7 complaints filed. Average repair cost runs about $2,500 at an independent shop.
What's the most expensive thing that goes wrong?
The powertrain is one of the costlier repair items. Average repair cost runs about $2,500 at an independent shop. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my GMC Terrain has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2021 GMC Terrain?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 34 complaints on file and the costliest repair averaging $2,500, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.
Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database, last synced 13 hours ago. Verify the raw federal record at
nhtsa.gov/vehicle/2021/GMC/Terrain.
Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics.
We are not affiliated with GMC. Some links on this page are affiliate links and we
may earn a commission if you purchase through them.
