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Old 01-03-2019, 10:07 PM   #46 (permalink)
jbogart812003
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Join Date: Jan 2019
Posts: 1

Got 17.5 mpg on the way home from the dealer but havent hit more then 15 mpg since. About 11.5 after the lift . Wonder if these new tunes will increase mpg enough to justify spending $4500 or are the just for hp/tq gains
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2019 gmc 2500 hd L5P
7.5 rough country lift
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