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GMC Sierra 1500 HD MPG

30 GMC Sierra 1500 HDs have provided 595 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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Old Cars W/ manual overdrive, beware!

I've noticed, particularly in cold weather, shifting my '96 ... ...

by bigdamnhero

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