The .bin will open in EFI Live, which allow for segment swaps for different transmission options. Tune Depot has a 4.3 / 1 Meg manual trans .ctz with the same OS.
dave w
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Dig around for l31 1 mb vin and managed to find some here
http://www.free-vin-decoder.com/chev...EC14X36G263145
Here are some files I build from p/n.
Wow. Thank you. This should be a big time saver for folks.