GMC Terrain Transmission Problems by Year
By CarWhere Research · Updated
Some, but not unusually many. 480 of the 3,186 owner complaints filed with NHTSA for the 2010–2025 GMC Terrain (15.1%) name the transmission, near the 12.6% median share across the 139 models we track. We have no published sales figures for this model, so there is no per-1,000 rate. The worst years are 2011, 2019 and 2010.
Transmission complaints
480
Filed with NHTSA, 2010–2025 models
Per 1,000 sold
No sales data
Not computed without a published sales figure
Share of all complaints
15.1%
of 3,186 complaints for this model
Transmission recalls
2
NHTSA campaigns, all years
GMC Terrain transmission complaints by model year
Owner complaints filed with NHTSA whose component list includes Power Train (transmission, transfer case and driveline). Worst years are highlighted.
| Model year | Transmission complaints | Share of all complaints | Crash / fire / injury | Transmission recalls | Transmission TSBs* |
|---|---|---|---|---|---|
| 2010WORST | 51 | 17.3% | 1 | — | 121 |
| 2011WORST | 76 | 19.1% | 1 | — | 137 |
| 2012 | 37 | 10% | 2 | — | 130 |
| 2013 | 44 | 11.9% | 0 | — | 144 |
| 2014 | 33 | 10.9% | 0 | — | 111 |
| 2015 | 26 | 8.2% | 0 | — | 104 |
| 2016 | 11 | 7.2% | 0 | — | 103 |
| 2017 | 24 | 17.8% | 0 | — | 87 |
| 2018 | 42 | 18.5% | 2 | 20V66800017V516000 | 138 |
| 2019WORST | 53 | 28.3% | 0 | 20V668000 | 111 |
| 2020 | 28 | 14.1% | 0 | 20V668000 | 103 |
| 2021 | 8 | 22.2% | 0 | — | 92 |
| 2022 | 12 | 13.5% | 0 | — | 52 |
| 2023 | 8 | 19.5% | 0 | — | 46 |
| 2024 | 23 | 41.8% | 0 | — | 49 |
| 2025 | 4 | 28.6% | 1 | — | 20 |
- Older model years have had more time on the road to collect complaints, so compare neighboring years, not 2010 against 2024.
- Crash / fire / injury = complaints where the owner reported a crash, a fire or an injury.
- *Technical service bulletins in the year's leading TSB categories that name the transmission.
Common GMC Terrain transmission problems owners describe
We searched the narratives of all 480 transmission complaints for symptom keywords. One complaint can mention several, so the shares don't add up to 100%.
GMC Terrain years to avoid for the transmission
2011 GMC Terrain
76 transmission complaints (19.1% of the year's 397). Most often described: jerking, lurching or harsh shifts.
2019 GMC Terrain
53 transmission complaints (28.3% of the year's 187). Most often described: slipping or revving without accelerating. Covered by transmission recall 20V668000.
2010 GMC Terrain
51 transmission complaints (17.3% of the year's 295). Most often described: loss of power or limp mode.
Worst years are those with at least 10 transmission complaints and at least 1.5 times the model's median year. For every year's overall verdict, including other systems, see the GMC Terrain years to avoid.
GMC Terrain transmission recalls
NHTSA recall campaigns filed under Power Train for any GMC Terrain model year. Recall repairs are free at a dealer. Check a specific car by VIN on NHTSA's site.
Which transmission does the GMC Terrain use?
- GM 6T40 / 6T45 — 2010–2014
Years are as listed for that transmission's applications. Some apply to certain engines only.
Related research
Frequently asked questions
Does the 2011 GMC Terrain have transmission problems?
Yes, it is one of the worst years. Owners filed 76 transmission complaints with NHTSA for the 2011 GMC Terrain, 19.1% of all 397 complaints for that year. The most common description is "jerking, lurching or harsh shifts" (18 complaints). 1 of those complaints report a crash, fire or injury.
Does the 2019 GMC Terrain have transmission problems?
Yes, it is one of the worst years. Owners filed 53 transmission complaints with NHTSA for the 2019 GMC Terrain, 28.3% of all 187 complaints for that year. The most common description is "slipping or revving without accelerating" (9 complaints). One transmission-related recall covers it: 20V668000.
Does the 2010 GMC Terrain have transmission problems?
Yes, it is one of the worst years. Owners filed 51 transmission complaints with NHTSA for the 2010 GMC Terrain, 17.3% of all 295 complaints for that year. The most common description is "loss of power or limp mode" (4 complaints). 1 of those complaints report a crash, fire or injury.
Which GMC Terrain years have the most transmission complaints?
2011 (76), 2019 (53) and 2010 (51), by owner complaints filed with NHTSA that name the transmission. Raw counts favor older and higher-selling years, so treat them as a signal, not a rate.
What are the most common GMC Terrain transmission problems?
In the 480 transmission complaints, owners most often describe jerking, lurching or harsh shifts (13.3%), loss of power or limp mode (10.2%) and hesitation or delayed engagement (6.9%). One complaint can mention several symptoms.
Is this a transmission failure rate?
No. These are complaints owners chose to file with NHTSA. Many failures are never reported, and one complaint is not a confirmed defect. Without sales figures, a high count can simply mean a high-selling model.
How we count
Counts are unique owner complaints (by NHTSA ODI number) filed with NHTSA for each GMC Terrain model year, from NHTSA's public complaints data fetched July 2026 to November 2026. A complaint counts as a transmission complaint when NHTSA's component list for it includes Power Train (transmission, transfer case and driveline).
Per 1,000 sold divides complaints by published U.S. calendar-year sales for that year. A year needs at least 5,000 sales to get a rate, and a model needs at least 3 such years for its overall rate. The comparison median covers every model with at least 50 transmission complaints that clears those floors.
These are complaint rates, not failure rates. Owners report some problems more than others, and a complaint is not a confirmed defect.
Sources
- NHTSA complaints by vehicle (owner complaints API) — National Highway Traffic Safety Administration
- NHTSA recalls by vehicle — National Highway Traffic Safety Administration
- Report a vehicle safety problem — National Highway Traffic Safety Administration