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GMC Sierra 2500 HD MPG

956 GMC Sierra 2500 HDs have provided 20.0 million miles of real world fuel economy & MPG data.
Click here to view all the GMC Sierra 2500 HDs currently participating in our fuel tracking program.

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Tips

Use ethanol-free gas

Wonder why your fuel economy drops during the winter? Ethano... ...

by XaXa

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