GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Express - AWD 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Power and Grounding Component Views
Figure 1:

Battery - G106
Object Number: 882408 Size: MF
(1)Battery Cable (+)
(2)Battery
(3)G106
(4)Battery Cable (-)
Figure 2:

Fuse Block - Underhood
Object Number: 886068 Size: MF
(1)Fuse Block Underhood - C7
(2)Fuse Block Underhood - C5
(3)Fuse Block Underhood - C6
(4)Fuse Block - Underhood
(5)Fuse Block Underhood - C4
(6)Fuse Block Underhood - C1
(7)Fuse Block Underhood - C2
(8)Fuse Block Underhood - C10
(9)Fuse Block Underhood - C3
(10)Fuse Block Underhood - C8 (UY7)
(11)Fuse Block Underhood - C9
Figure 3:

Fuse Block - Body
Object Number: 886070 Size: MF
(1)Fuse Block Body - Cover
(2)Fuse Block Body - C4 (YF7)
(3)Fuse Block Body - C3
(4)Fuse Block Body - C1
(5)Inflatable Restraint Sensing and Diagnostic Module (SDM)
(6)Fuse Block Body - C2
(7)Fuse Block Body - C5 (YF7)
Figure 4:

Forward Lamps Harness Routing
Object Number: 882406 Size: LF
(1)Marker Lamp Connector - LF
(2)G100
(3)Headlamp - Low Beam Connector - Left (Composite)
(4)Headlamp - High Beam Connector - Left (Composite)
(5)S110
(6)S118
(7)Park/Turn Signal Lamp Connector - RF
(8)Marker Lamp Connector - RF
(9)G101
(10)Headlamp - Low Beam Connector - Right (Composite)
(11)Headlamp - High Beam Connector - Right (Composite)
(12)Park/Turn Signal Lamp Connector - LF
(13)Fuse Block Underhood - C4
Figure 5:

G104 and G105
Object Number: 882410 Size: MF
(1)G104
(2)G105
Figure 6:

Engine Harness - Back of the Engine (4.3L)
Object Number: 882677 Size: LF
(1)G102
(2)Camshaft Position (CMP) Sensor Connector
(3)G103
(4)Engine Oil Pressure (EOP) Sensor Connector
(5)Knock Sensor (KS) Connector
(6)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector
Figure 7:

Engine Harness - Back of the Engine (4.8L/5.3L/6.0L)
Object Number: 882710 Size: MF
(1)G103
(2)Engine Oil Pressure (EOP) Sensor Connector
(3)G102
(4)Camshaft Position (CMP) Sensor Connector
Figure 8:

Chassis Harness Routing (Passenger/Cargo)
Object Number: 1371219 Size: LF
(1)Fuse Block Underhood - C3
(2)Fuse Block Underhood - C7
(3)Fuse Block Underhood - C8 (UY7)
(4)Wheel Speed Sensor (WSS) Connector - RF
(5)Brake Pressure Differential Switch Connector (Light Duty)
(6)Evaporative Emission (EVAP) Canister Vent Solenoid Connector (Gas)
(7)S301
(8)Electronic Brake Control Module (EBCM) Connector (JL4)/Electronic Brake Control Module (EBCM) - C2 (w/o JL4)
(9)Electronic Brake Control Module (EBCM) - C1 (w/o JL4)
(10)Trailer Right Stop/Turn Relay (UY7)
(11)Trailer Left Stop/Turn Relay (UY7)
(12)S315 (JL4)
(13)G300
(14)Wheel Speed Sensor (WSS) Connector - LF
(15)C101
Figure 9:

Outer Center Frame (Cutaway)
Object Number: 884972 Size: MF
(1)G300
(2)Evaporative Emission (EVAP) Canister Vent Solenoid Connector (Gas)
(3)Electronic Brake Control Module (EBCM) - C1
(4)Electronic Brake Control Module (EBCM) - C2
Figure 10:

I/P Harness Routing - Lower Left Side of the Passenger Compartment
Object Number: 883613 Size: LF
(1)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(2)C318
(3)G301
(4)G302
(5)G303
(6)SP200
(7)C222 (YF7)
(8)Seat Belt Pretentioner Connector - LF (Light Duty)
(9)C300 (Light Duty)
(10)Fuse Block Body - C5 (YF7)
(11)Fuse Block Body - C3
Figure 11:

Upper Steering Column
Object Number: 1195907 Size: LF
(1)Passlock Sensor
(2)Ignition Key Alarm Switch
(3)Ignition Lock Cylinder Control Actuator
(4)Ignition Switch
(5)Ignition Key Cylinder
(6)Horn Switch
(7)Inflatable Restraint Steering Wheel Module
(8)Turn Signal/Multifunction Switch
(9)Hazard Warning Switch
Figure 12:

I/P Harness Routing - Right Side of the Passenger Compartment
Object Number: 883636 Size: MF
(1)C201 (UE1)
(2)C225 (DF5/UE1)
(3)C312
(4)G304
(5)C202 (UE1)
Figure 13:

Body Harness Routing - Left B-Pillar (Passenger/Cargo)
Object Number: 885006 Size: LF
(1)Body Harness Cover
(2)S311 (w/o YF7)
(3)S310 (w/o YF7)
(4)S308 (w/o YF7)
(5)C304 (w/o YF7)
(6)C203 (YF7/DH6)
(7)C303 (YF7/C69 w/Rear Auxiliary Controls)
(8)Door Contact Plate Connector - Left Side (E26/AU3)
(9)C407 (ENC)
(10)C409 (ENC)
(11)Fuse Block Body - C2
(12)S310 (YF7)
(13)S308 (YF7)
(14)S311 (YF7)
(15)Body Harness
(16)Body Harness
(17)Lower B-Pillar
(18)Door Jamb Switch Connector - LR Side (E26)
(19)SP347
(20)G347
Figure 14:

Body Harness Routing - Rear of the Passenger Compartment (Passenger/Cargo)
Object Number: 885009 Size: LF
(1)G401
(2)S451
(3)C415
(4)C419
(5)S450
(6)S401
(7)S404
(8)G402
(9)C401
(10)C411
(11)C407 - 135 Wheel Base (C36/C69)
(12)C409 - 135 Wheel Base (C36/C69)
(13)C400
(14)C412
(15)C402
(16)S403 (w/o YF7)
Figure 15:

Access/Pro Harness and Components (PRP)
Object Number: 1226742 Size: LF
(1)Dome Fluorescent Work Lamp - LR (UF2)
(2)Dome Fluorescent Work Lamp - LF (UF2)
(3)S350 (UF2)
(4)S348 (UF2)
(5)Dome Fluorescent Work Lamp - 2 (UF2)
(6)Dome Fluorescent Work Lamp - 1 (UF2)
(7)Dome Fluorescent Work Lamp - RH (UF2)
(8)Access Panel Actuator - Right Side Front
(9)Access Panel Actuator - Right Side Rear
(10)S409
(11)Access/Pro Wiring Harness
(12)Body Control Module (BCM)
(13)Fuse Block - Body
(14)S302 (UF2)
(15)S303
(16)Dome Fluorescent Work Lamps Relay (UF2)
(17)Fuse Block - Rear
(18)S309
(19)S300
(20)S408
(21)G403
(22)Access Panel Actuator - Left Rear Side Rear
(23)Access Panel Actuator - Left Rear Side Front
(24)Access Panel Actuator - Left Front Side Rear
(25)Access Panel Actuator - Left Front Side Front
Figure 16:

Rear Frame
Object Number: 884973 Size: MF
(1)C405 (Cutaway)
(2)S402
(3)G400