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    1. #24
      Join Date
      Aug 2004
      Location
      Jacksonville, FL
      Posts
      1,666
      Country Flag: United States
      I added the pin on my GMPP harness and then figured out how to “trick” The GMPP pcm to work with my magnum. The GMPP is a little different then the other GM pcms. The trans reluctor setting of 40 is locked in (because they assume you are going to use an electronic auto trans or a Super magnum (all are 40 tooth trans signals). If you are using a regular magnum, they are 12 tooth and an LS style t56 is a 17 tooth reluctor wheel on trans). If you use one of the non 40 tooth trans, it is super easy to reconfigure the programming with HP tuners. This is only the case with a GMPP PCM.

      Chris
      1968 Chevy Camaro SS
      LT4 (coming)/T56 DSE suspension

      1969 Oldsmobile Cutlass S convertible (442 Clone)
      LS3/4L70e, DSE suspension






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