Hello. I got an 03 z71 and just installed a pioneer touch screen stereo. Everything works except door chimes. The only wire I did not connect is the small diameter orange wire from the original harness plug. I have one wire from the new radio that I did not use. It is orange with white stripe. Does anyone know if these wires pertain to the door chimes or data? As I said, everything else works fine. Trying to find the color codes for this truck is a nightmare as there were about 15 that I saw and only one of them were close.

 

Welcome from Florida. The orange wire has to do with lighting.