Hi
I bought new ecm and tcm for a 2010 5.3/6l80
when i tried to start the truck i got this erro P0602 Powertrain Control Module Programming Error
the local gm dealer changed the tcm again and i still got this massage. is there a way to rewrite it with hp tuner. I managed to read the file but the car doesnt start as lon as this massage is there
thank you

