85 C10 "Rob Peter to Pay Paul" 5.3 Swap

[Lost81c10]

Originally Posted by Wgesnerjr

Assembly Line Diagnostic Link or ALDL is a proprietary on-board diagnostics system developed by General Motors prior to the standardization of OBD-2.

This is the underdash plug for the OBD system. you will need this.

I see. ok, I do have this ALDL and the 3 or 4 wires that come out of it. I cut these off at the area where they meet the big wiring harness going to the engine. I hope that was ok but if I need the entire length I guess I can find and pull the cut wires at the engine bay side where they come out from the cabin.

I have seen videos for this but I am sure I will have more questions when I come to this point.