2025 GMC Terrain Pre-Purchase Inspection Checklist
Known Issues — 2025 GMC Terrain
MODERATE
1.5L Turbo carbon buildup long term
MODERATE
9-speed transmission shudder
MINOR
Early production software calibration
MINOR
Lane keep assist sensitivity
MINOR
Wireless CarPlay connectivity
MINOR
TPMS calibration after rotation
What to Inspect
- Test 1.5T for performance and no rough idle
- Test 9-speed transmission for shudder
- Test infotainment and wireless CarPlay
- Test ADAS features on highway
- Confirm full factory warranty is active
- Test all comfort features
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 7,500 miles | $60-$90 |
| Transmission fluid service | every 45,000 miles | $180-$280 |
| Spark plugs | every 60,000 miles | $120-$200 |
| Intake valve cleaning (DI engine) | every 60,000 miles | $200-$350 |
| Brake service (pads and rotors) | every 40,000 miles | $300-$450 |
| Cabin air filter | every 20,000 miles | $30-$50 |
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