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Gmc 06 1500 5.3

nattieman00

By nattieman00
February 18, 2008 in 1999-2013 Silverado 1500 & Sierra 1500

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nattieman00

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nattieman00

Posted February 18, 2008

Posted February 18, 2008

Has anyone used a fuel max in a 2006 gmc sierra 5.3. Has it helped with fuel like they say it will. Up to 4MPG??

lerbud

Enthusiast

lerbud

Posted February 18, 2008

Posted February 18, 2008

get a custom tune. you can get 2 plus mpg and a lot more horsepower........

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