Which PCM connector for valet wiring?

[DrX]

The tutorial says red connector- pin 56. My connectors are green and blue.:nixweiss: Hopefully both aren't open at pin 56. Going to go have a look and see what's up.

[DrX]

Well, both connectors are open at pin 56. So which one is it?

[TAQuickness]

Per the GM service manuals, you want pin 56 on the green connector.

Blue Connector:
56 WHT 1579 Fuel Temperature/Composition Signal (L59)

Green Connector:
56 -- -- Not Used

[DrX]

Thanks. I guess for some reason I was expecting the manual to say both were unused. Looks like this is the one then: