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Thanks for the reply mate. I have change the ECM to 09 and my gearbox is still 08 thats the reason i want to update the TCM OS. I have try your method but no luck.

Good Day Gents,

Little advise/help appreciate..

I am no expert and just new to this..

I got Ls2 and 6L80E trans. I want to chance the my trans OS is 2008 and want to upgrade to 2009. I got...

Good Day Gents,

Little advise/help appreciate..

I am no expert and just new to this..

I got Ls2 and 6L80E trans. I want to chance the my trans OS is 2008 and want to upgrade to 2009. I got...