GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2009
🢒
Yukon XL - 4WD
🢒
Power and Signal Distribution
🢒
Wiring Systems and Power Management
🢒 Upfitter Provision Schematics
Figure
1:
Roof Beacon - TRW/5G4
Figure
2:
Police Power - 5W4 or PPV