I have an 03 Escalade WITH the Bose system. I got a new head unit (Dual XVM296BT) and got the Metra GM11 wiring harness so I could use SWC. Can someone tell me which wires are KEY 1 and KEY 2? Although I couldn't locate the wires, I still wanted to make sure the radio worked. But when I plugged...

So, I am working on a friends 2003 Escalade 6.0L. The car has chimes, steering wheel controls, and onstar. The problem is the two radio harnesses were cut at the dashboard and I am having trouble finding a diagram to connect these wires to a new Factory OEM harness he bought. If you guys are...