2024 GMC Terrain power train problems
20 owner complaints filed with NHTSA name the power train on the 2024 GMC Terrain — 42% of all complaints for this model year.
What owners report
“The vehicle has experienced a recurring transmission-related defect that has required multiple repair attempts by an authorized GMC dealership. The transmission system has also exhibited fluid leakage. Despite prior repairs, the problem has continued to reoccur. Transmission and associated…”
filed Jun 23, 2026
“Accelerator lag from any speed or stop. The care will take several seconds to hunt for the correct gear before shifting to accelerate. Or it will delay acceleration for several seconds while your pressing the accelerator. No SES indicator active. Mechanics can’t find issues. Other owners on forum a…”
filed Jun 18, 2026
“Leaking transmission fluid at 7,000 miles. Technicians noticed during routine oil change at dealership.”
filed Jul 13, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Terrain years
| Year | Reports | Share |
|---|---|---|
| 2026 Terrain | 4 | 17% |
| 2023 Terrain | 6 | 17% |
| 2022 Terrain | 7 | 15% |
| 2021 Terrain | 8 | 24% |
| 2020 Terrain | 26 | 14% |
| 2019 Terrain | 50 | 28% |
| 2018 Terrain | 41 | 19% |
| 2017 Terrain | 23 | 17% |
| 2016 Terrain | 11 | 7% |
| 2015 Terrain | 21 | 7% |
| 2014 Terrain | 33 | 11% |
| 2013 Terrain | 44 | 12% |
Other reported problem areas on the 2024 GMC Terrain
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.