2014 GMC Sierra
6 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| Sierra C15 2WD | 18 | 23 | 20 | Regular Gasoline | Rear-Wheel Drive | 4.3L 6-cyl | Automatic 6-spd |
| Sierra C15 2WD | 15 | 21 | 17 | Regular Gasoline | Rear-Wheel Drive | 6.2L 8-cyl | Automatic 6-spd |
| Sierra C15 2WD | 16 | 23 | 19 | Regular Gasoline | Rear-Wheel Drive | 5.3L 8-cyl | Automatic 6-spd |
| Sierra K15 4WD | 14 | 20 | 17 | Regular Gasoline | 4-Wheel Drive | 6.2L 8-cyl | Automatic 6-spd |
| Sierra K15 4WD | 16 | 22 | 18 | Regular Gasoline | 4-Wheel Drive | 5.3L 8-cyl | Automatic 6-spd |
| Sierra K15 4WD | 17 | 22 | 19 | Regular Gasoline | 4-Wheel Drive | 4.3L 6-cyl | Automatic 6-spd |