GMC Sierra AT4X (2025–present)
Standard Pickup Trucks 4WDdieselgas
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VE
Storage spaces
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Fuel economy (EPA)
| Trim | Years | Fuel | Best combined MPGe | City | Highway |
|---|---|---|---|---|---|
| Sierra AT4X · 4WD · Automatic 10-spd | 2025–2026 | Diesel | 19 | 19 | 20 |