GMC Sierra 3500 HD MPG

66 GMC Sierra 3500 HDs have provided 1.2 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

Fueling up

When filling up with fuel and the fuel stops, leave it, don'... ...

by mikefromsandiego

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