2020 GMC Sierra
Standard Pickup Trucks 2WD · Rear-Wheel Drive · Diesel
26
Combined MPG
23
City MPG
30
Highway MPG
—
Safety Rating
📊 Key Statistics — 2020 GMC Sierra
- Combined fuel economy: 26 MPG (23 city / 30 highway)
- Annual fuel cost: $3,100
- CO₂ emissions: 392 grams/mile
Specifications
| Make | GMC · Company Profile |
| Model | Sierra |
| Year | 2020 |
| Class | Standard Pickup Trucks 2WD |
| Drive | Rear-Wheel Drive |
| Transmission | Automatic 10-spd |
| Fuel Type | Diesel |
| Cylinders | 6 |
| Engine Size | 3.0L |
EPA Scores
| Fuel Economy Score | 5/10 |
| Greenhouse Gas Score | 5/10 |
| You Save/Spend vs Average | $-4,750 over 5 years |
Annual Fuel Cost
| Annual Fuel Cost (15K mi, $3.50/gal) | $2019 |
| Monthly Fuel Cost | $168 |
| Cost per Mile (fuel only) | $13¢ |
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 | = |
| 2019 | 21 | ↓ |
| 2018 | 20 | ↓ |
| 2017 | 20 | ↓ |
| 2016 | 20 | ↓ |
Similar 2020 Standard Pickup Trucks 2WD
- Chevrolet Silverado — 27 MPG
- Ram 1500 — 26 MPG
- Ford F150 — 24 MPG
- Ford Ranger — 23 MPG
- Nissan Frontier — 20 MPG
- Nissan Titan — 18 MPG
- Toyota Tundra — 15 MPG
- Roush Performance F150 — 13 MPG