Quote Originally Posted by Taz View Post
Hello Stefan,

OS 12631085 is an update (garage shudder, etc.) to the OEM original OS 12597778 - from a 2005 Colorado L52 3.5 L 4L60. I have the original OS on file - from a 2005 Colorado with 3.42 gears.

Not sure if that is of any use to you ...


Regards,
Taz
I know it has been a long time, but do you still have that file? I have a bin with a corrupted OS.
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