2006 Sierra radio wiring

I have a 2006 Sierra 1500 RDS radio that I am trying to use for a shop radio. I have removed the chip to unlock it but it did not unlock. The chip was in the right location but had a different number from normal. I get the error code as usual and lost the preset function. The only way it will play (for a few minutes) is by using the three buttons. The difference in this radio is the chip # and an extra small orange wire. It only has the large orange, the small orange, directly under the large, the ground and the speaker wires. I can't find a wiring diagram showing a small orange wire. Any help is appreciated.