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Thread: 2007 Pontiac Gran Prix

  1. #1
    Potential Tuner
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    Jul 2014
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    Question 2007 Pontiac Gran Prix

    Swapping a 2007 3800 NA into a Fiero. Has anyone used this engine? It is supported by HPtuners. A little gun shy 3rd attempt (used Buick wiring harness before).

    Thanks Joe Sokol

  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Rogers, MN
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    It's a very popular engine choice, though I'd say most use the previous gen body style because they are still drive by cable and not drive by wire like the 2004+ cars are.

    The computer is supported by HP Tuners. You can view that on the HP Tuners site in the vehicles page.

    The things with doing that kind of swap is that you have to keep things the same. If you used a 2007 Grand Prix computer you need the same wiring harness and the correct electronic pedal assembly.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.