Lighting Systems Component Views. Chevrolet Express 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Express 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Lighting Systems Component Views

Figure 1:

Left Front of the Vehicle - Sealed Headlamp


(1)	Headlamp - Left

Figure 2:

Right Front of the Vehicle - Sealed Headlamp


(1)	Headlamp - Right

Figure 3:

Left Front of the Vehicle - Composite Headlamp


(1)	Headlamp - High Beam Connector - Left
(2)	Headlamp - Low Beam Connector - Left

Figure 4:

Right Front of the Vehicle - Composite Headlamp


(1)	Headlamp - Low Beam Connector - Right
(2)	Headlamp - High Beam Connector - Right

Figure 5:

Forward Lamps Harness Routing


(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 6:

Underhood Lamp Harness


(1)	Underhood Lamp Connector
(2)	C109

Figure 7:

I/P Harness Routing - Left Side of the I/P


(1)	C221
(2)	Data Link Connector (DLC)
(3)	Stop Lamp Switch Connector

Figure 8:

Left Side of the I/P


(1)	Headlamp and Panel Dimmer Switch

Figure 9:

Upper Steering Column


(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 10:

Center of the I/P


(1)	I/P Carrier
(2)	Chime Module (UL5)
(3)	Turn Signal/Hazard Flasher Module

Figure 11:

Upper Left Front of the Passenger Compartment


(1)	Vanity Mirror Lamp Connector - Left (DH6)

Figure 12:

Upper Right Front of the Passenger Compartment


(1)	Vanity Mirror Lamp Connector - Right (DH6)

Figure 13:

Driver Door


(1)	Mini-Wedge Door Jamb Switch - Driver

Figure 14:

Front Passenger Door


(1)	Mini-Wedge Door Jamb Switch - Front Passenger

Figure 15:

Body Harness Routing - Left B-Pillar (Passenger/Cargo)


(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 (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 Ajar Switch Connector - LR (E26)
(19)	SP347
(20)	G347

Figure 16:

Body Harness Routing - Right B-Pillar


(1)	C312
(2)	Seat Belt Pretensioner Connector - RF (Light Duty)
(3)	C306
(4)	Door Contact Plate Connector - Right (Passenger/Cargo w/AU3)
(5)	Door Ajar Switch Connector - RR (Passenger/Cargo)

Figure 17:

Chassis Harness Routing (Passenger/Cargo)


(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
(7)	S301
(8)	Electronic Brake Control Module (EBCM) - C2
(9)	Electronic Brake Control Module (EBCM) - C1
(10)	Trailer Right Stop/Turn Relay (UY7)
(11)	Trailer Left Stop/Turn Relay (UY7)
(12)	G300
(13)	Wheel Speed Sensor (WSS) Connector - LF
(14)	C101

Figure 18:

Headliner (Passenger/Cargo)


(1)	Courtesy/Reading Lamp - Front
(2)	Courtesy/Reading Lamp - Mid
(3)	Courtesy/Reading Lamp - Rear
(4)	Dome Lamp - Rear (Cargo)

Figure 19:

Pro Harness and Components (PRP)


(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)	C204
(12)	Body Control Module (BCM)
(13)	S205
(14)	C206
(15)	C205
(16)	I/P Harness
(17)	Fuse Block - Body
(18)	S302 (UF2)
(19)	S303
(20)	Fuse Block - Rear
(21)	S309
(22)	S300
(23)	S408
(24)	G403
(25)	Access Panel Actuator - Left Rear Side Rear
(26)	Access Panel Actuator - Left Rear Side Front
(27)	Access Panel Actuator - Left Front Side Rear
(28)	Access Panel Actuator - Left Front Side Front

Figure 20:

Body Harness Routing - Rear of the Passenger Compartment (Passenger/Cargo)


(1)	G401
(2)	S451
(3)	C415
(4)	C419
(5)	S450
(6)	S401
(7)	S404
(8)	G402
(9)	Tail Lamp Assembly Connector - Left
(10)	C411
(11)	C407 - 135 Wheel Base (C36/C69)
(12)	C409 - 135 Wheel Base (C36/C69)
(13)	C400
(14)	C412
(15)	Tail Lamp Assembly Connector - Right
(16)	S403 (w/o YF7)

Figure 21:

Right Rear Cargo Door Harness Routing (Passenger/Cargo)


(1)	Rear Window Defogger Grid Connector - Right (C49)
(2)	Mini-Wedge Door Jamb Switch - Cargo
(3)	Door Lock Switch Connector - Rear Cargo (AU3)
(4)	License Lamp Connector
(5)	S902
(6)	Speaker Connector - RR Door (UB1/UC6)
(7)	C412
(8)	C400

Figure 22:

Rear of the Vehicle (Passenger/Cargo)


(1)	Tail/Stop and Turn Signal Lamp - Left
(2)	Center High Mounted Stop Lamp (CHMSL)
(3)	Tail/Stop and Turn Signal Lamp - Right
(4)	Backup Lamp - Right
(5)	License Lamp
(6)	Backup Lamp - Left