different tcm operating system

[LarryJewell]

can I flash in a different tcm operating system with nothing more than changing my vin number over. I was thinking of trying out an 01' tcm in my o4 lly truck.

Or do I have to copy over the changes or run a script file?

 

[Bluemax]

Changing the vin and doing a full re-flash has always worked for me.

 

[LarryJewell]

thanks