I have an 06 silverado running an 04 pcm but have the 06 tac... can i run an 04 file in it?
I have an 06 silverado running an 04 pcm but have the 06 tac... can i run an 04 file in it?
No. Will trigger REP.
Flash the 04 PCM with the 06 cal file, then it will work.