FICM compatability

[mr.c]

Bill: The one with the missing strategy number was the 2003 ecm. It didn't run very well and there was no tow/haul. I did some searching and found the CVN is calibration verification number. The '03 ecm showed a 0 for that.
The ecm that had good response did have a CVN.
At any rate I sent you two ecm's in case there is a problem programming the 2003 unit. I would like to use the '03 ecm if possible and leave the 2004 original ecm alone.
I do share your contempt for what the dealers are doing to our trucks. In my case I made them promise that they wouldn't flash it before I left it with them. They did it anyway. I better end this now. Getting riled up again.
You should receive a package today or tomorrow with a new FICM and 2 ECM's. Again, the second ecm is just in case there is a problem programming the '03 unit.