GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 Yukon XL - 2WD 🢒 Body 🢒 Wiring Systems 🢒 Upfitter Provision Schematics
Figure 1:

Roof Beacon Wiring - 5G4
Object Number: 1464804 Size: FS
Master Electrical Component List
Control Module References
Mobile Radio Power (9L4)
IPC/DIC, LH HID, RH HID, SEO B1, SEO B2, and TBC BATT Fuses
IPC/DIC, LH HID, RH HID, SEO B1, SEO B2, and TBC BATT Fuses
IPC/DIC, LH HID, RH HID, SEO B1, SEO B2, and TBC BATT Fuses
Dimming Control and LED DImming Supply Voltage - 1 of 2
Dimming Control and LED DImming Supply Voltage - 1 of 2
I/P Dimming Supply Voltage - 6 of 8
G200 - 3 of 3 - S345
G200 - 1 of 3
G200 - 1 of 3
G200 - 1 of 3
G304 and G305
Figure 2:

Mobile Radio Power - 9L4
Object Number: 1464805 Size: FS
Master Electrical Component List
Control Module References
Roof Beacon Wiring (5G4)
B+ Bus - 1 of 2
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
G100 and G105 - 1 of 4