2021 GMC Terrain Lane departure Problems
- Complaints
- 2about this part
- Share
- 6%of 36 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the lane departure of the 2021 GMC Terrain, 6% of the 36 complaints for this model year. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was backing out of a parking spot when I came in contact with a vehicle going east bound in the parking lot the contact was on the rear right side of my vehicle before I could do anything my vehicle sped up and proceeded to go forward jump a curb I had my foot on the brakes when I realized I wasn’t stopping and heading for a garage I turned right trying to avoid the garage but still hit the corner of garage causing damage then vehicle stopped and shut down.The Vehicle is still being repaired the mechanic said there was damage to a box and cable going to transmission but couldn’t say if it…”
NHTSA complaint #11522061, filed 2023-05“The engine light came on while driving, saying “engine power reduced”. It barely accelerates, RPMs go over 5, it chugs when driving. Taken to an independent service center.”
NHTSA complaint #11713477, filed 2026-01Lane departure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 2 | 6% |
| 2025 | 1 | 8% |
| 2024 | 1 | 2% |
| 2023 | 4 | 10% |
| 2021 | 2 | 6% |
| 2020 | 2 | 1% |
| 2018 | 2 | 1% |
| 2016 | 1 | 1% |
| 2015 | 2 | 1% |
| 2014 | 2 | 1% |
| 2013 | 1 | 0% |
| 2010 | 1 | 0% |
Other parts of the 2021 GMC Terrain
10 complaintsBrakes
8 complaintsTransmission and drivetrain
8 complaintsElectrical system
7 complaintsFuel system
4 complaintsOther or unknown
4 complaintsForward collision avoidance
3 complaintsEngine cooling
2 complaintsSuspension
2 complaintsAir bags
1 complaintsSteering
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 GMC Terrain
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology