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Superchip??

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May 13, 2005 | 10:09 AM

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tri-citytruck

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Superchip??

04 Gmc 5.3 ..I have the superchip programmer..has anybody seen any difference between the performance and 87 octane program??? thanks

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May 13, 2005 | 10:23 AM

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LVSTOGOFST2002

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i noticed only a slight difference. the towing program seemed to have a little bit more torque... as welll.

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