Wondering if there is any truth to this......
I have read a couple of times on the internet of all things about I need to flash my Manual tune to the ECM before disconnecting my existing 6L80E......
Otherwise the ECM freaks out....possibly bricks???
Trying to figure out the best time to Flash the tune once I get it, which I am having some trouble with acquiring as well.....(OS issues)
Any help would be appreciated.
Thx
John