GMC Sierra 1500 HD MPG

15 GMC Sierra 1500 HDs have provided 162 thousand miles of real world fuel economy & MPG data.
Click here to view all the GMC Sierra 1500 HDs currently participating in our fuel tracking program.

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Older vehicles with 200,000 miles plus

Add STP oil it not only reduces noise and clatter at startup... ...

by cidpusa

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