Wireless Charging

[Srode1]

3rd is probably a signal wire to tell the radio to display the symbol which indicates that the system is 'charging'.

that would make sense, but which wires are which?

[Srode1]

I found it - here's a link to it http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=1114016

 

Yellow is retained power, black ground, and green goes to the BCM

[redwngr]

Nice.

 

Upfitter manual or service manual or posted somewhere?

[Srode1]

Nice.

 

Upfitter manual or service manual or posted somewhere?

It's from a searchable data base of wiring schematics and TSBs. Posted the link to that here under TSBs subforum

 

http://www.gm-trucks.com/forums/topic/194686-searchable-tsbs-and-wiring-diagrams/

[redwngr]

Thanks for the link.