2021 GMC Terrain Engine cooling Problems
- Complaints
- 2about this part
- Share
- 6%of 36 total for the year
- Median mileage
- 78,843miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 2021 GMC Terrain, 6% of the 36 complaints for this model year. Where a mileage was given, the median is 78,843 miles.
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.
“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. I have read so many people having the same issue with needing a new turbo just after 60,000 miles”
NHTSA complaint #11724745, filed 2026-03“The contact owns a 2021 GMC Terrain. The contact stated that the transmission was previously replaced. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The failure had occurred intermittently. Additionally, the contact stated that while driving approximately 15-20 MPH and depressing the accelerator pedal, the vehicle failed to respond for approximately 1 minute. The vehicle was taken to the Nissan dealer it was purchased several times. …”
NHTSA complaint #11687881, filed 2025-09, 78,843 milesRelated service bulletins
- 10251890Mar 13, 2024This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 1 | 2% |
| 2022 | 2 | 3% |
| 2021 | 2 | 6% |
| 2020 | 3 | 2% |
| 2018 | 1 | 0% |
| 2017 | 2 | 1% |
| 2015 | 4 | 1% |
| 2014 | 7 | 2% |
| 2013 | 11 | 3% |
| 2012 | 5 | 1% |
| 2011 | 22 | 6% |
| 2010 | 10 | 3% |
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 complaintsLane departure
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 27, 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