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54 Posts
Discussion Starter · #1 ·
Hi....I've been trying to improve the mileage on my 03 Z71 Sierra.
Done all the regular plugs, low restriction K&nN filter and CAI, low viscosity oil(5-20) driving slower.....

Any other tips? Will I pick up anything with a tune from a good dyno tune?

With the price of gas, just trying to optimize what i can with my DD.

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