I have been fighting this for awhile now. What is the proper way to add pids to model years and change the units. I know you can go into V8 and open Scan or you can do it in BBX but it never works for me. Like I went in today and changed the pid lineup for an LBZ and when I hooked up to truck it was a whole different pid lineup. And for the life of me I can't get the damn units to change.