I've been having electrical issues so I've been looking at wiring diagrams a lot lately. During my studies of these diagrams, I noticed that some describe a RED retainer on the PCM connector where my PCM connectors have blue and green retainers. I bought the 4L60e to 4L80e adapter harness and ISS sensor harness from Nelson and the instructions for the 1999-2007 classic mention a RED connector. Based on my research for my 2006 silverado, the ISS sensor wires I am to install into the PCM are to be inserted into C2 (connector with green retainers), red wire into pin 22 and blue wire into pin 23. Is that correct? I need to be sure I add the ISS in the proper PCM location.

 

Pins 22 and 23 of the Green connector as per this: https://www.performancetrucks.net/fo...g-swap-413157/

 

Early models were red and blue and then in like 01-02 it changed to green and blue. Never used a Nelson harness so no idea how they have it setup, I just rewired mine to be like a factory 80e as its very simple.

 

Thank you!

 

99-02 Harness have Blue and Red connectors with 512K PCM's

03-07Classic Harness have Blue and Green connectors with 1MB PCM's