I'm trying to read the tune out of my baby Duramax, however I've been unsuccessful so far.
Using VCM Editor 3.4.84 on Windows 10.
I'll plug the interface in while the truck's off, and turn the key forward to acc. The fuel pump appears to run for a longer period of time than with the interface not plugged in. The menu option for read remains grayed out. The interface will flash "busy" every few seconds.
To verify the interface and PC are functional I successfully read my '02 Camaro without issue.
Are there any steps I'm missing to read my Colorado? Any help would be greatly appreciated.