2018 GMC Sierra
Standard Pickup Trucks 2WD · Rear-Wheel Drive · Regular Gasoline
20
Combined MPG
18
City MPG
24
Highway MPG
—
Safety Rating
📊 Key Statistics — 2018 GMC Sierra
- Combined fuel economy: 20 MPG (18 city / 24 highway)
- Annual fuel cost: $3,000
- CO₂ emissions: 447 grams/mile
Specifications
| Make | GMC · Company Profile |
| Model | Sierra |
| Year | 2018 |
| Class | Standard Pickup Trucks 2WD |
| Drive | Rear-Wheel Drive |
| Transmission | Automatic 8-spd |
| Fuel Type | Regular Gasoline |
| Cylinders | 8 |
| Engine Size | 5.3L |
EPA Scores
| Fuel Economy Score | 4/10 |
| Greenhouse Gas Score | 4/10 |
| You Save/Spend vs Average | $-4,250 over 5 years |
Annual Fuel Cost
| Annual Fuel Cost (15K mi, $3.50/gal) | $2625 |
| Monthly Fuel Cost | $219 |
| Cost per Mile (fuel only) | $18¢ |
Based on 15,000 miles/year and $3.50/gallon national average.
Compare This Car
GMC Sierra — MPG by Year
| Year | MPG | |
|---|---|---|
| 2026 | 68 | ↑ |
| 2025 | 64 | ↑ |
| 2024 | 25 | ↑ |
| 2023 | 26 | ↑ |
| 2022 | 26 | ↑ |
| 2021 | 26 | ↑ |
| 2020 | 26 | ↑ |
| 2019 | 21 | ↑ |
| 2017 | 20 | = |
| 2016 | 20 | = |
Similar 2018 Standard Pickup Trucks 2WD
- Ford F150 — 25 MPG
- Ram 1500 — 23 MPG
- Chevrolet Silverado — 20 MPG
- Nissan Titan — 18 MPG
- Toyota Tundra — 16 MPG
- Roush Performance F150 — 12 MPG