I have a stand alone 6L80 and am having issues uploading the tune,,,If I open V8, go to tune, then auto detect it correctly detects the T43 controller, then when I hit read it goes through the steps all the way to "read, please wait" then I get a $0101 script stopped no data....
The transmission is operating only I desperately need to get in and see about tuning the shift points
Edit, if I use V7.5 tune it gets to the same point, reading then after 20 minutes of the little green circle going around with the progress bar staying blank I gave up.
I wounder if I should try to load a 6L80 tune and see what happens???