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Sierra HD
Fuel Economy
Sorry, we don't yet have gas mileage data for the Sierra HD.
None of our members have yet commented on the real gas mileage of the GMC Sierra HD.
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Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the GMC Sierra HD's real-world MPG based on how and where you drive a car.
What Our Members Are Saying about the Real Gas Mileage of the GMC Sierra HD
None of our members have yet commented on the real gas mileage of the GMC Sierra HD.
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