GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Sonoma Pickup - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Wiper/Washer Component Views
Figure 1:

Body Harness to Cowl
Object Number: 357126 Size: LF
(1)Blower Motor Relay Connector
(2)Body Harness
(3)Windshield Wiper Motor Connector
(4)G117
(5)P100
(6)Cruise Control Module (CCM) Connector
(7)Underhood Lamp Connector
(8)Front Axle Vacuum Solenoid Connector
(9)S138
(10)Blower Motor Resistor Connector
(11)Not Used
(12)Blower Motor Connector (C42/C60), Blower Motor Control Module (C68)
(13)C101 (2.2 L)
(14)C101 (4.3 L)
(15)S121
(16)S113
(17)S118
Figure 2:

Body Wiring Harness, Left Underhood
Object Number: 357129 Size: LF
(1)Electronic Brake Control Module (EBCM)
(2)Fuse Block - Underhood
(3)Fender, LF
(4)Rear Window Washer Fluid Pump
(5)Windshield Washer Fluid Pump
Figure 3:

Center I/P Switches
Object Number: 1004323 Size: LF
(1)Instrument Panel (I/P)
(2)Transfer Case Shift Control Switch
(3)Inflatable Restraint I/P Module Switch (Pickup Only)
(4)Auxiliary Power Outlet - Right
(5)Auxiliary Power Outlet - Left
(6)I/P Tray, Ashtray and Cigar Lighter
(7)Rear Wiper/Washer Switch and Endgate/Liftglass Window Release Switch (Utility)
(8)Transfer Case Shift Control Switch C2
(9)Transfer Case Shift Control Switch C1
Figure 4:

Endgate Harness Routing View
Object Number: 397727 Size: LF
(1)Window Wiper Motor Controller - Rear
(2)Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch
(3)P900
(4)Endgate Harness
(5)Liftglass Release Actuator
(6)Liftglass/Endgate Lock Cylinder Switch
(7)Endgate