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Thread: need help tuning a 2008 GRAND PRIX with 3.8

  1. #1
    Potential Tuner
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    Mar 2021
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    need help tuning a 2008 GRAND PRIX with 3.8

    Anyone ever tuned a 2008 base model grand prix with a 3.8? Can it be done if i swapped computers out with like an o5 model?im wanting to top swap the motor.

  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Nope.

    The 2008's went to can-bus with a different computer. Anything older wouldn't work unless you changed every single harness and computer inside that vehicle to a older computer.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuning Addict blindsquirrel's Avatar
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    Apr 2017
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    Is this a P05/P05b or whatever they're called? Very limited parameters on those, no matter what year.

    '06-'09 show the same Service Number, '05-down is different. Why in the world would you want to use the older hardware anyway?