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Thread: Anyone Tune, Or have tunes for a 4.3L Vortec in a 2002 GMC SIERRA???

  1. #1
    New Member
    Join Date
    Oct 2010

    Default Anyone Tune, Or have tunes for a 4.3L Vortec in a 2002 GMC SIERRA???

    Hey guys, I have a customer with 2002 GMC sierra 1500, with a 4.3L vortec "X Motor"? He just wants to tune it to raise the rpm limit and a little more power for towing, it is a manual trans, None of the aftermarket tuners like superchips, hypertech etc build a tuner for it because its the X Motor?? Just wondering if anyone has tuned one, or if it can be done I guess.. Any advice would be appreciated, I have only tuned duramax, and dont build my own tunes... I guess everyone makes a tuner for the Y motor but wont tune the X
    Please Enlighten me lol
    Thanks, Mat

  2. #2
    Lifetime Member
    Join Date
    May 2010


    You can tune that truck. Its supported. X is the 8th digit in the vin. X means it is a 4.3 V6. Post up the tune file so we can take a look.
    1997 S10, 06 trailblazer SS LS2 swap, 4L70E trans, 76mm turbo. Factory ZQ8 suspension. 3.08, G80 w/a zexel. With a 0411 swap.

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