GMC Sierra (Flex Fuel) (2026–present)
Standard Pickup Trucks 4WDgas
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VE
Storage spaces
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Fit reports from owners
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Fuel economy (EPA)
| Trim | Years | Fuel | Best combined MPGe | City | Highway |
|---|---|---|---|---|---|
| Sierra (Flex Fuel) · 4WD · Automatic 10-spd | 2026 | Regular Gasoline | 17 | 15 | 19 |