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09-18-2008, 11:32 PM
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Registered User
Join Date: Feb 2003
Location: Abilene Texas
Posts: 557
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tuner for 5.3
ive got a 2001 chevy z71 with the 5.3 vortech in it. its got right at 143,000 miles and ive owned the pick up a year. im thinking about adding a tuner or programmer to it? my questions are do they really help with the mpg like some say? is it worth the hp gain they give anyone here have one added to theres.
will it hurt it since the miles are so high?
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