What code should I be looking for? Is the code the same on all gm ecus or specific to the ecu OS.

How hard would it be to find vats in the bin and modify the bin manually with hex editor?

Im new to this and am wondering if there is a cheap way to remove vats. Iv been doing a little research i think i may be able to un solder the flash chip and read with reader but dont know how to...

Im new to this and want to learn how to tune efi and change things in the ecu.