I'm installing/adapting a 2004 5.3ltr w/matching 4L60E trans into a 57' Chevy Nomad and my question is: Do I need to wire in the Transmission Range Switch Connector to the PCM for it to be able to shift/operate fine? Or will it operate fine just using the Grey 20 Pin plug that controls the shift solenoids?
I know i have to wire Pin 33 on blue connector to brake switch...