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.