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2026 GMC Yukon XL full-size SUV, which comes with several engine options (gas V8s and an optional turbo-diesel):
🚙 2026 GMC Yukon XL — Fuel Economy (City / Highway)
🔹 3.0L Duramax Turbo-Diesel (most efficient)
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City: ~ 20 MPG
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Highway: ~ 26 MPG
This diesel setup offers the best fuel economy of the Yukon XL lineup while still delivering strong torque for towing and hauling.
🔹 5.3L V8 Gas (common gasoline engine)
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City: ~ 15 MPG
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Highway: ~ 20 MPG
This is typical with the standard 5.3-liter V8, especially in rear-wheel-drive configurations.
🔹 6.2L V8 Gas (higher-output gasoline engine)
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City: ~ 14–15 MPG
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Highway: ~ 18–19 MPG
The larger 6.2-liter V8 trades fuel economy for more power, especially with four-wheel drive.
📊 Estimated MPG Summary
| Engine / Fuel Type | City MPG | Highway MPG |
|---|---|---|
| 3.0L Turbo-Diesel | ~20 MPG | ~26 MPG |
| 5.3L V8 Gas | ~15 MPG | ~20 MPG |
| 6.2L V8 Gas | ~14–15 MPG | ~18–19 MPG |
💡 Notes
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Fuel economy numbers can vary based on drivetrain (2WD vs 4WD), trim level, and weight due to cargo or towing load. Diesel variants typically see the best efficiency figures.
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These figures are EPA estimates; real-world results depend on driving style, terrain, and conditions.
If you’d like, I can also share estimated driving range (miles per tank) for each engine based on typical fuel tank size and these mpg figures.
