2021 Sierra Denali 2500HD black diamond edition wireless charger issues

[swhsah]

I just took delivery from a private party of this truck and I have found the wireless charger system does not work with any of my or my wife's phones. I have had bad modules in the past so I installed the latest module, 13547618, with no change. I have searched and tried to find fuse location and a wiring schematic but have come up empty. Not being familiar with the way gm does this I just get confused. If it were a Caterpillar product I would have no issues as I am a Caterpillar Master Tech for the last 40 years. Can someone point me to the wireless charger fuse block and fuse location/number? Can I get a wiring schematic for the wireless module? Any help would be greatly appreciated. 

 

Thanks in advance

Scott