LS swap with 4l80e- 1995 suburban

[eran tomer]

I bought a PSI harness and pcm, and the instructions recommend getting a park or neutral signal to the pcm, by grounding a certain wire whenever the tranny is in these positions.
where can I connect the wire to?

 

[L31MaxExpress]

I bought a PSI harness and pcm, and the instructions recommend getting a park or neutral signal to the pcm, by grounding a certain wire whenever the tranny is in these positions.
where can I connect the wire to?

Does it not have the connector for the range sensor?

 

[eran tomer]

it has the round big connector, the VSS connector and the ISS connector which I don't know what it is.