Hi All,
Many have noticed that Holden / Pontiac leave the checksum disabled on many of the TCM tunes, this is nothing to be alarmed about.
Just click on the Update Checksums button in the tuning tool and save the file. Once that is done EFILive will allow you to retune / program the TCM.
See also - http://forum.efilive.com/showthread.php?t=4921
Thanks,
Ross
