GMC · gas
GMC Terrain fuel economy & road trip cost
The GMC Terrain (2018–2026) is rated at 26 combined MPG with a 15.6 gallon tank, giving roughly 324 miles between stops once you keep a sensible reserve.
Combined MPG
26
Tank
15.6 gal
Usable range
324 mi
Cost per mile
$0.133
Gas cost per 100 miles in a GMC Terrain
| Pump price ($/gal) | 100 miles | 300 miles | Full tank |
|---|---|---|---|
| $3.00 | $11.54 | $34.62 | $46.80 |
| $3.50 | $13.46 | $40.38 | $54.60 |
| $4.00 | $15.38 | $46.15 | $62.40 |
| $4.50 | $17.31 | $51.92 | $70.20 |
| $5.00 | $19.23 | $57.69 | $78.00 |
Highway-heavy trips usually beat the combined rating; city traffic and roof loads reduce it.
Popular trips in a GMC Terrain
- Las Vegas to Phoenix · ~$40
- Las Vegas to Los Angeles · ~$36
- Los Angeles to San Francisco · ~$55
- Los Angeles to San Diego · ~$18
- Los Angeles to Las Vegas · ~$36
- San Francisco to Los Angeles · ~$55
- New York to Boston · ~$30
- New York to Washington · ~$32
- New York to Philadelphia · ~$13
- Chicago to Indianapolis · ~$26
- Chicago to Detroit · ~$37
- Chicago to St. Louis · ~$41
Fuel figures on this page are modelled estimates built from published EPA combined MPG ratings and curated regional pump-price baselines. They are not live station quotes — always confirm the price at the pump before you travel.