2024 GMC Terrain problems and complaints
Owners have filed 49 complaints with NHTSA about the 2024 GMC Terrain. The most-reported areas: Power Train (21), Engine (11), Fuel/Propulsion System (10).
Key takeaways
- 49 owner complaints on file with NHTSA.
- 1 involve a crash, 1 a fire, 2 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Power Train | 21 | 43% |
| Engine | 11 | 22% |
| Fuel/Propulsion System | 10 | 20% |
| Unknown Or Other | 9 | 18% |
| Electrical System | 6 | 12% |
| Forward Collision Avoidance | 3 | 6% |
| Service Brakes | 3 | 6% |
| Vehicle Speed Control | 3 | 6% |
| Air Bags | 2 | 4% |
| Firerelated | 1 | 2% |
| Hydraulic | 1 | 2% |
| Lane Departure | 1 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2024 GMC Terrain SUV AWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2024 GMC Terrain SUV FWD | 5/5 | 5/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Power Train - filed 2026-09-01
Factory powertrain programming actively locks out 9th gear (overdrive) during freeway driving at speeds exceeding 60–65 mph. The vehicle refuses to upshift from 8th to 9th gear, forcing sustained high-RPM operation during standard highway cruising.
Unknown Or Other - filed 2026-07-23
The rear access closes on its own after sitting open for a period of time. I was sitting at grocery pick up with the access open. This caused it to close on worker at grocery pick up. It stayed closed and I had to hit the button to open it back it did not auto go back up when it couldn’t close.
Forward Collision Avoidance - filed 2026-07-14
I was driving about 55 mph with adaptive cruise control set to maintain a three-car-length following distance. It was raining, and when the vehicle in front of me slowed down, my vehicle did not detect it or slow down as expected. Instead, it continued accelerating, and I had to brake to avoid rear-ending the vehicle a...
Diagnose it yourself
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
More for the 2024 GMC Terrain
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.