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September 13th, 2012 | 6:28 AM

James1969

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James

I have a 2010 Z-71 with 33x12.5x20s and my gas mileage is crap. If I have the truck programmed will this give me an increase in gas mileage or do I need to change the gear ratio?

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September 13th, 2012 | 10:34 AM

country_09

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From: Highlands

6 speed or 4 speed tranny? A custom tune will do wonders for it. 33s aren't as big a difference as 35s so regearing may not need to happen. What gears are stock in the truck and what motor?

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September 13th, 2012 | 8:34 PM

James1969

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5.3 with 6 speed trans. Not sure about what the gears are. I think they are 343 but not sure.

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September 13th, 2012 | 9:00 PM

country_09

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Airaid intake tube and filter then Custom tune and be done. Should net 2-3 more mpg. What are you gettin for mpg's right now?

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September 13th, 2012 | 9:34 PM

James1969

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Right now I am getting 13-14 on the highway.

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September 13th, 2012 | 10:07 PM

country_09

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That's not that bad. Do the intake tube and filter then get a custom tune. Should put you around the 15 mpg mark and make the truck much more fun to drive

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September 13th, 2012 | 10:30 PM

James1969

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Good deal. Thanks for the info. I am going to get this done soon as I get home. I am also going to install true dual exhaust system with 12" glass packs. So it will sound pretty sweet as well.

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James

James

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