GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Silverado - 4WD 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Upfitter Provision Schematics
Figure 1:

Mobile Radio Power (9L4)
Object Number: 2065162 Size: FS
Figure 2:

Roof Beacon Wiring (TRW)
Object Number: 2065165 Size: FS
Figure 3:

Emergency Vehicle Wiring (5Y0)
Object Number: 2065170 Size: FS
Figure 4:

Wrecker Wiring (5X7)
Object Number: 2065173 Size: FS