working on and 07 Silverado 4.8l with on3 76mm turbo kit with 80# injectors.

I'm having tcm issues it states during an entire write or calibration
only write that "tcm file not found" error message and wont let me
proceed. I've searched the forum for help. I've rested the battery and
let it sit for 30 mins disconnected then I've pulled the tcm fuse and
let sit for 30 mins. ive tried loading stock tunes back also. im all
out of ideas. Thanks for the help in advance.

I've attached the sd 2bar tune that's in the truck that im trying to
replace with standard 1 bar tune that I've also attached.




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Thanks,

Justin Johnson
Jax Transport
Operations Manager
806-355-1463
806-683-6958