2020 GMC Terrain Pre-Purchase Inspection Checklist
Known Issues — 2020 GMC Terrain
MODERATE
1.5L Turbo engine carbon buildup on intake valves
MODERATE
9-speed automatic transmission shudder
MODERATE
Infotainment system freeze
MODERATE
Oil consumption on 1.5T engine
MINOR
Wireless CarPlay limited or unreliable
MINOR
Front lower control arm bushing noise at high mileage
What to Inspect
- Test 1.5T for carbon buildup symptoms
- Test 9-speed transmission for shudder
- Test infotainment for freeze
- Check oil level after drive
- Test CarPlay connectivity
- Listen for front suspension bushing noise over bumps
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 |
| Coolant flush | every 50,000 miles | $100-$150 |
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