One problem related to transmission failure has been reported for the 2018 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Terrain based on all problems reported for the 2018 Terrain.
Transmission fails to down shift after accelerating in traffic. Rpm legal 2200 rpm at 40 mph for over a mile before dropping to correct 1200 rpm for that speed.
| Power Train problems | |
| Transmission Noise problems | |
| Clutch problems | |
| Transmission Failure problems |