jchevy

I have a PCM from a 03 express van. I need the OS from an 04 plus express for the correct flex fuel tables. Do I just download an 04+ tune from the repository, license it, write it to my pcm and tune from there? They are both p59 pcms.

truckdoug

iTrader: (25)

yeah I havent found away around spending the credits to license an entirely new OS

but make sure the one you license is the exact one you want....no refunds lol

jchevy

Do I have to find an OS from another p59 PCM or can it come from others? Ideally I would like to find an OS with better resolution in the main VE table for the 3bar map along with all of the flex fuel tables.

How do I know what OS is compatable with my PCM?

truckdoug

iTrader: (25)

that i do not know off the top of my head, but i think it's covered somewhere in the flex fuel/3 bar thread

rpturbo

iTrader: (47)

Those express van ecms are not all interchangeable. Make sure you have the correct ecm that supports what you want to do, before writing a different os to it.