3rd Gen Generation (2025–2026)
2025 GMC Terrain Fuel Cost
Combined Gas Mileage
25 MPG
Full Tank Fill Cost
$56
Estimated Tank Range
400 Miles
Cost Per Mile
$0.14 / mi
EPA Fuel Economy & Expense Breakdown
| EPA Fuel Economy Rating | 22 City / 30 Hwy / 25 Combined MPG |
|---|---|
| Fuel Tank Capacity | 16 Gallons (60.6 Liters) |
| Recommended Fuel Grade | Regular Unleaded (87 Octane) |
| Single Full Tank Cruising Range | 400 Miles (Mixed Driving) |
| Estimated Full Tank Refill Expense | $56 (at $3.50/gal) |
| Annual Estimated Gasoline Expense | $2100 / year (15,000 miles/yr) |
Recommended Fuel Efficiency & Monitoring Tools
Fuel System
Complete Fuel System Cleaner
Concentrated polyetheramine (PEA) detergent that dissolves fuel injector carbon deposits and restores lost MPG.
View Cleaner on Amazon →
Tire PSI
Precision Digital Tire Gauge
Backlit heavy-duty pressure gauge to ensure exact factory tire PSI, reducing rolling resistance and extending fuel range.
View Gauge on Amazon →
Real-Time Data
OBD2 Real-Time Mileage Scanner
Bluetooth diagnostic adapter displaying live instant MPG, fuel trim data, and engine sensor load on your smartphone.
View Scanner on Amazon →SelectMyBlog participates in affiliate programs and may earn commissions from qualifying purchases.
Frequently Asked Questions
How much does it cost to fill up a 2025 GMC Terrain?
At benchmark fuel prices, completely filling the 16 gallon tank costs approximately $56.
What is the official gas mileage (MPG)?
The EPA rating is 22 MPG City / 30 MPG Highway / 25 MPG Combined.
How far can it drive on a single full tank?
Estimated cruising range is approximately 400 miles on a single full tank under mixed driving conditions.