Im trying to load cal files on a new TCM but will not alow do to OS difference and will not let me create script any ideas or anyone have a stock cal for 2456580 OS
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Im trying to load cal files on a new TCM but will not alow do to OS difference and will not let me create script any ideas or anyone have a stock cal for 2456580 OS
Your only option is a GM TIS Flash.
The A40 has a super slow factory read and flash process that cannot be sped up or changed, so the only way to get it corrected is a dealer flash with TIS if you want the exact OS is not then a stock file that matches will allow the cal flash.
What is the year/model you need ?
it is 06' gmc 3500 cab chassis 4x4