2026 GMC Terrain Lane departure Problems
- Complaints
- 2about this part
- Share
- 6%of 33 total for the year
- Median mileage
- —not reported
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 2 complaints about the lane departure of the 2026 GMC Terrain, 6% of the 33 complaints for this model year.
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.
“Two issues here. First is that the car will give a danger warning when nothing is there. Sometimes goes as far as slamming on my breaks. Both in drive and reverse. Second is the lane keep assist. It’s like it is working backwards. I turned this all off because it would jerk me out of the lane and into the other lane or off to the sides of the road.”
NHTSA complaint #11737214, filed 2026-05“a failing telematics module on your 2026 GMC Terrain is causing network corruption, leading to an erratic speedometer and loss of driver assistance systems while driving.”
NHTSA complaint #11765984, filed 2026-09Related service bulletins
- 11019464Apr 15, 2025This informational service bulletin provides information on how to correct the pop-up message "Lane Keep Assist Unavailable" after being taken out of transport mode.
Lane 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 2026 GMC Terrain
9 complaintsForward collision avoidance
6 complaintsElectrical system
5 complaintsSuspension
5 complaintsTransmission and drivetrain
5 complaintsBrakes
4 complaintsWheels
4 complaintsSteering
3 complaintsBody and structure
2 complaintsBack-over prevention (rear camera)
1 complaintsEngine
1 complaintsLatches, locks and linkages
1 complaints
← All problems reported for the 2026 GMC Terrain
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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