2026 GMC Sierra: Sierra 4WD · 5.3L · 4WD · 10-speed automatic
One configuration of the 2026 GMC Sierra as listed by our sources.
Configuration specifications| Engine | 5.3L 8-cylinder (SIDI) |
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| Displacement | 5.3 L |
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| Cylinders | 8 |
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| Fuel type | Gasoline |
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| Transmission | 10-speed automatic |
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| Drivetrain | 4WD |
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| Combined economy | 16 mpg (14.7 L/100 km) |
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| City economy | 15 mpg (15.7 L/100 km) |
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| Highway economy | 18 mpg (13.1 L/100 km) |
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