Just got EFI installed and working with my computer, tomorrow I am going to attempt to interact with my truck. I have two questions, first, I have a 2006 LLY Duramax which is the same as the 2006 LBZ but with different tuning. Which controller (LLY or LBZ) do I want to specify from the drop down when attempting to download the stock tun with my V2 unit?
Question 2 -- When using the scan tool, I notice it wants an "OP System" selected from the drop down, what is this and where can I find it? Any information would be appreciated.
Thanks