Table 1 shows one common electrical system related problems of the 2025 GMC Terrain.
| Problem Category | Number of Problems |
|---|---|
| Electrical System problems |
Onstar module not working.
Vehicle wouldn’t unlock/start with primary key fob or secondary key fob. Tried manual entry with both key fobs still could not enter.
Incident 1: pulled out from stop sign car made funny noises, light came on said it couldn't shift to drive. Had towed to dealer. They said couldn't find issue except it was quart and a half low of transmission fluid. The car had approx 3,500 miles on it. Incident 2: for about two weeks when pulling out felt like it was skipping but didn't feel like transmission. Felt like over powered. Then it done same as incident 1. Pulled out made noise would not move. Notice that is couldn't shift and check engine light came on had it towed again. Approx 6,300 miles on it. They then said it was very low on transmission fluid and they did find a small hole in hose. Danger is pulling out and it just stops in cross traffic and won't move could easily be hit. It is very scary to drive not knowing if or when it is going to happen. I have no current invoice on vehicle as it is still in shop.
The contact owns a 2025 GMC Terrain. The contact stated while driving at an undisclosed speed, the infotainment system displayed a blank screen. The contact pulled over to the right side of the road into a gas station and turned off and restarted the vehicle, and the infotainment system displayed a message "update failed - see dealer to restore system". The dealer was contacted. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.