I'd like to make a commanded gear indicator for a truck without a standard ECM/PCM. It's a 6.5 Diesel with a DB2/4L80E, and a standalone TCM. Thanks to this post - https://www.thetruckstop.us/forum/threads/4l80e-shift-indicator-lights.34643/ I think I could rig something up by tapping the...
Hi, I've been bashing my head against the wall on this and getting nowhere. The truck is a 99 Hummer, it's OBD2, new P400, new DS4 IP, the ECM has a Heath tune, and I'm using an AutoEnginuity scan tool.
I used Time Set to get the base timing set to 3.5*. I read somewhere that on OBD2...