Its actually a very common swap. No there is no 454/0411 bin. They are using the 01-02 express van l31 2500 bin and scaling. Thank you for the tip. I used tunerpro on my 1995 G30 a few years ago. I did not realize it could support newer ecm flashing as the website only lists the older bins. I found a 02 express 2500 bin and will mess around a bit.
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