I recently installed a 4l80 in a 99 suburban with a 5.7 vortec. I did a bunch of research on here trying to find info on segment swaps, only to find out it?s not supported by this Pcm. I contacted support to see if they could help with a compareable file, and was told this Pcm wouldn?t run a 4l80??? There are plenty of vortec powered 3/4 ton truck from the mid 90?s with 4l80?s and this Pcm. Does anyone know a work around? I know I can?t segment swap, but shouldn?t I be able to use another trucks file and just change the vin? I?m not concerned about the credits....I just want to make this work without going to a stand-alone controller and all the problems that presents.