GMC Terrain electrical system problems by year
342 NHTSA owner complaints name the electrical system across 16 Terrain model years. The most reported year is 2010 with 48 reports.
| Year | Electrical System reports | Share | Median mileage | |
|---|---|---|---|---|
| 2026 Terrain | 4 | 14% | — | |
| 2024 Terrain | 6 | 12% | — | |
| 2023 Terrain | 7 | 18% | — | |
| 2022 Terrain | 7 | 12% | — | |
| 2021 Terrain | 7 | 20% | — | |
| 2020 Terrain | 27 | 14% | — | |
| 2019 Terrain | 38 | 21% | — | |
| 2018 Terrain | 35 | 16% | 24,500 mi | |
| 2017 Terrain | 9 | 7% | — | |
| 2016 Terrain | 9 | 6% | — | |
| 2015 Terrain | 31 | 10% | 48,237 mi | |
| 2014 Terrain | 31 | 10% | 47,242 mi | |
| 2013 Terrain | 22 | 6% | 47,500 mi | |
| 2012 Terrain | 32 | 9% | 77,000 mi | |
| 2011 Terrain | 29 | 8% | 89,500 mi | |
| 2010 Terrain | 48 | 17% | 75,000 mi |
Share is the fraction of that year’s complaints naming the electrical system. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.