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GMC Sierra 3500 HD MPG

104 GMC Sierra 3500 HDs have provided 2.1 million miles of real world fuel economy & MPG data.
Click here to view all the GMC Sierra 3500 HDs currently participating in our fuel tracking program.

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Tips

Don't turn on the engine if its not needed

There are some situations in which turning on the engine is ... ...

by judacomadc

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