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dirtymaxlb7
July 8th, 2016, 03:34 AM
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

GMC-2002-Dmax
July 8th, 2016, 06:57 AM
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 ?

dirtymaxlb7
July 11th, 2016, 12:51 AM
it is 06' gmc 3500 cab chassis 4x4