Hey guys, looking for an OS from a P59 PCM that is able to display an EGR monitor status. The 03 Silverado file currently in here didn't ever come with an EGR so nothing comes up under the monitors for it.
12579405 is the OS currently in there.
Anyone know what OS from what vehicle can be written in or if there is an OS that a engine diag segment can possibly be swapped in?