Hi, im new to the EFI live world for duramax but have been doing them with HP tuners for years, this is the first time ive had a problem with a 2010. basically I could not use the orig 2010 tcm file so I used a known good stock 2010 tcm file, after that truck is stuck in 3rd. I cant communicate with the tcm. I even went to GM and got them to try programming with a tech2 and they couldent program it.
does anyone have some 2010 Files that I can try? or any ideas on what to do
I'm looking at getting a new TCM and dealing with this one later but thats kind of a last resort.
any help would be greatly appreciated