Good morning everyone. I just got a 2006 Silverado 2500HD WT Model and I’m struggling to wire a unit into it. First, I can’t find the right harness. Second, does anyone have the vehicle wiring diagram? It doesn’t have steering wheel controls, but there is a small connector with four spots that has red, yellow, and black wires. I’m really stuck here. Any help would be great.
If I remember right, one of the wires for key power or constant power might need to come from the fuse box.
Just get the right interface module and you’ll be all set.
Check out this link. It should have what you need.
Let us know… did you or someone else already cut off the head unit harness?