GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Chevy K Silverado - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Power and Grounding Component Views
Figure 1:

Lower LF of the Radiator Support Components
Object Number: 310809 Size: MF
(1)LH Lower Radiator Support
(2)Forward Lamp Harness
(3)Negative Battery Cable (G100)
(4)Frame
(5)Ground 100 (G100)
Figure 2:

Auxiliary Battery Relay
Object Number: 349894 Size: MF
(1)Auxiliary Battery Relay
(2)A/C Accumulator
(3)A/C Low Pressure Switch
(4)Inner Wheel Well
(5)Engine Coolant Level Switch Connector
(6)Mass Air Flow (MAF) Sensor
(7)Air Cleaner Assembly
(8)Engine Coolant Recovery Reservoir
(9)Auxiliary Battery Relay Electrical Connector
Figure 3:

Fuse Block-Underhood
Object Number: 310806 Size: MF
(1)Fuse Block-Underhood Bracket
(2)I/P Harness
(3)Radiator Support
(4)Inline Connector C103 or C104-I/P Harness Side
(5)Inline Connector C103 or C104-Forward Lamp Harness Side
(6)LH Battery Tray
(7)Fuse Block-Underhood Bracket
(8)Fuse Block-Underhood Bracket
Figure 4:

Fuse Block-Underhood Connectors
Object Number: 310798 Size: MF
(1)Fuse Block-Underhood
(2)C4 (GRN)
(3)C3 (RED)
(4)Fuse Block-Underhood Bracket
(5)LH Inner Fender (Shield)
(6)LH Inner Fender
(7)C1 (LT GRY)
(8)C2 (BLK)
Figure 5:

Fuse Block-Underhood-C1 (LT GRY) and C6 (BRN)
Object Number: 404504 Size: MF
(1)Fuse Block-Underhood
(2)C7 (BLK) Cavity
(3)Fuse Block-Underhood Bracket
(4)C6 (BRN)
(5)I/P Harness
(6)C1 (LT GRY)
Figure 6:

Fuse Block-Underhood-C2 (BLK) and C5 (BLK)
Object Number: 404501 Size: MF
(1)C2 (BLK)
(2)Fuse Block-Underhood
(3)Fuse Block-Underhood Bracket
(4)C5 (BLK)
(5)Engine Harness
Figure 7:

Fuse Block-Underhood-C3 (RED) and C8 (LT GRY)
Object Number: 404499 Size: MF
(1)C3 (RED)
(2)Fuse Block-Underhood
(3)C8 (LT GRY)
(4)Fuse Block-Underhood Bracket
(5)Chassis Harness
Figure 8:

Fuse Block-Underhood-C4 and Inlines
Object Number: 404508 Size: MF
(1)C4 (GRN)
(2)I/P Inline Connectors
(3)Fuse Block-Underhood Bracket
(4)Connector Tether
(5)I/P Harness Inline Connector
(6)C103 (I/P Side)
(7)C103 (FWD Lamp Side)
(8)Forward Lamp Inline Connector
(9)Fuse Block-Underhood
Figure 9:

Lower LR of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 310261 Size: LF
(1)Ground 103 (G103)
(1)Ground 103 (G103)
(2)Engine Harness- H02S
(3)HO2 Sensor connector- Bank 1, Sensor 1
(4)Fuel Line Bracket
(5)Ground 104 (G104)
(5)Ground 104 (G104)
(6)Oil Pressure Sensor Connector
(6)Oil Pressure Sensor
(7)Engine Ground Strap (G107)
(8)TP 1 Battery Cable (G106)
Figure 10:

G102 (4.3L)
Object Number: 1373404 Size: LF
(1)Starter
(2)G102
(3)Crankshaft Position (CKP) Sensor Connector
(4)Negative Battery Cable
Figure 11:

G103 and G104 (4.3L)
Object Number: 1373403 Size: LF
(1)Camshaft Position (CMP) Sensor Connector
(2)Engine Oil Pressure (EOP) Sensor Connector
(3)G103
(4)G104
(5)Ground Strap
(6)Knock Sensor (KS) Connector
Figure 12:

Lower Left Side of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 403980 Size: MF
(1)Engine Harness
(2)Battery Cable Junction Block Bracket
(3)LH Rocker Cover
(4)Ground 102 (G102)
(5)Negative Battery Cable
(6)Engine Coolant Temperature (ECT) Sensor Connector
Figure 13:

Lower Left Side of the Engine (6.6L)
Object Number: 1217662 Size: MF
(1)Engine Block
(2)G108
(3)G104
Figure 14:

Lower LR of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 310261 Size: LF
(1)Ground 103 (G103)
(1)Ground 103 (G103)
(2)Engine Harness- H02S
(3)HO2 Sensor connector- Bank 1, Sensor 1
(4)Fuel Line Bracket
(5)Ground 104 (G104)
(5)Ground 104 (G104)
(6)Oil Pressure Sensor Connector
(6)Oil Pressure Sensor
(7)Engine Ground Strap (G107)
(8)TP 1 Battery Cable (G106)
Figure 15:

Lower Right Side of the Engine (6.6L)
Object Number: 1217665 Size: MF
(1)G103
(2)Engine Block
(3)G102
(4)G109
Figure 16:

LF Engine - G101
Object Number: 1348155 Size: LF
(1)G101
(2)Battery Cable
Figure 17:

G102 - 8.1L
Object Number: 656528 Size: MF
(1)Engine - 8.1L
(2)Knock Sensor (KS) - 2
(3)Knock Sensor (KS) - 2 Connector
(4)Engine Harness
(5)G102 - Engine Harness Ground
Figure 18:

G104-8.1L
Object Number: 814474 Size: MF
(1)Engine-8.1L
(2)EGR Valve
(3)Engine Oil Pressure (EOP) Sensor
(4)Engine Ground Strap
(5)G104-Engine Harness Ground
Figure 19:

RH Upper Instrument Panel
Object Number: 403970 Size: MF
(1)Instrument Panel
(2)Ground 200 (G200)
(3)Ground Stud
Figure 20:

Lower Center of the I/P Components
Object Number: 310152 Size: MF
(1)Ashtray Lamp Socket
(2)Bulb
(3)Ashtray Lamp Shield
(4)Instrument Panel
(5)Accessory Power Outlet
(6)Cigar Lighter Assembly
Figure 21:

Fuse Block- Right I/P
Object Number: 310167 Size: LF
(1)Fuse Block-Right I/P
(2)Instrument Panel
Figure 22:

Upper Left of the I/P Components
Object Number: 310066 Size: MF
(1)Splice Pack 203 (SP203)
(2)Ground 203 (G203)
(3)Dash
(4) A-Pillar
Figure 23:

Left Hand Lower Dash
Object Number: 310145 Size: MF
(1)Fuse Block Connector
(2)Body Control Module (BCM) Connector
(3)Splice Pack 205 (SP205)
(4)Fuse Block
(5)Data Link Connector (DLC)
(6)LH IP Courtesy Lamp
(7)LH IP Courtesy Lamp Socket
(8)LH IP Support to Dash
(9)Left Windshield Pillar Trim Panel
Figure 24:

Steering Wheel and Column Sub-System Components
Object Number: 856748 Size: LF
(1)Steering Wheel Audio Controls - Left
(2)Passlock Sensor Connector
(3)Ignition Key Alarm Switch
(4)Ignition Lock Cylinder Control Actuator
(5)Ignition Lock Cylinder Control Actuator Connector
(6)Ignition Switch
(7)Ignition Key Cylinder
(8)Steering Wheel Audio Controls - Right
(9)Horn Switch
(10)Steering Wheel Driver Information (DIC) Controls - Right
(11)C277
(12)Steering Wheel Driver Information Center (DIC) Controls - Left
(13)Turn Signal/Multifunction Switch
Figure 25:

Left Side Frame Rail -- Grounds
Object Number: 574025 Size: MF
(1)Frame
(2)Electronic Brake Control Module (EBCM) Ground (GNO)
(3)Manual Selectable Ride Ground (G302)
(4)Automatic Transfer Case/ABS Ground (G110)
Figure 26:

Driver Side B-Pillar Wiring
Object Number: 623131 Size: MF
(1)LH B-Pillar
(2)G305
(3)LH Body Harness
Figure 27:

Left Side Frame Rail -- Brake Components
Object Number: 309937 Size: MF
(1)Ground 302 (G302)
(2)LH Body Mount
(3)Ground Screw
(4)Electronic Brake Control Module (EBCM)
(5)Fuel Tank
Figure 28:

RH B-Pillar
Object Number: 573989 Size: LF
(1)Instrument Panel
(2)C4 (and C3)
(3)Junction Block-I/P
(4)RT-B-Pillar
(5)Ground 306 (G306)
(6)RH Body Harness
(7)I/P Harness Inline Connector C208
Figure 29:

G305
Object Number: 1373410 Size: LF
(1)G305
(2)LH B-Pillar
(3)C305
(4)Inflatable Restraint Sensing and Diagnostic Module (SDM)
Figure 30:

G304 and G306
Object Number: 1373409 Size: LF
(1)C396
(2)G306
(3)G304
(4)C399
(5)RH B-Pillar
Figure 31:

Emergency Light Relay and G305-Utility/Crewcab
Object Number: 814896 Size: LF
(1)Emergency Roof Lamp Harness
(2)Roof Beacon Relay
(3)G305
(4)B Pillar-LH Side
Figure 32:

Below Front Seats Components (Both w/Power)
Object Number: 309991 Size: MF
(1)Driver Power Seat Electrical Connector
(2)Passenger Power Seat Wiring Harness
(3)Passenger Power Seat Electrical Connector
(4)Inline Wiring Connector (IP)
(5)Power Seat Wiring Harness Connector
(6)Ground 304 (G304)
Figure 33:

Fuel Tank and Sensor (Typical)
Object Number: 309947 Size: MF
(1)Fuel Sender
(2)Ground 403 (G403)
(3)Fuel Filler Ground 302 (G-403)
(4)LH Frame
(5)Fuel Sender (Typical)
Figure 34:

G401
Object Number: 1373411 Size: LF
(1)Frame
(2)Fuel Tank
(3)Rear Differential
(4)G401
Figure 35:

Trailer Receptacle
Object Number: 349942 Size: MF
(1)Platform Assembly Trailer Weight Distribution Hitch
(1)Platform Assembly Trailer Weight Distribution Hitch
(2)Trailer Wiring Receptacle
(3)Trailer Wiring Receptacle Bracket
(3)Trailer Wiring Receptacle Bracket
Figure 36:

Trailer Wiring Harness
Object Number: 349960 Size: MF
(1)Trailer Wiring Connector
(2)Trailer Wiring Receptacle
(3)Frame
(4)Trailer Hitch Receiver
Figure 37:

Rear Frame -- Rear Lamp Components
Object Number: 309877 Size: MF
(1)Rear Lamp Bussing Block Bracket
(2)Rear Lamp Bussing Block
(3)Rear Cross Sill
(4)Rear Lamps Bussing Block Electrical Connector
Figure 38:

LR Frame -- Camper Provision
Object Number: 309959 Size: MF
(1)Camper Wiring Harness
(2)Frame
(3)Camper Wiring Harness Connector