1997 vortec conversion to 411 PCM

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twalker69

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May 14, 2015
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hey guys got a 1997 gmc sierra with a built 4l60e trans and my 383 stroker should be done next week. i went out and got my 411 pcm for the ol girl. i got the wiring sheet already but am confused as to what exactly needs to be done. my existing blackbox has different connectors and stuff. wondering if anyone could give me a heads up on this. any pics would be cool too. thanks
 
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