Looking for a tune 04 5.3 Gmc/EFI live

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Sep 18, 2008 | 02:57 PM

turboolds

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Looking for a tune 04 5.3 Gmc/EFI live

anyone have a tune for a 04 yukon 5.3, all stock except for air cleaner, want more performance, better shifting. im using efi live by the way. thanks

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