Chevrolet Chevy Express H1500 2004 - 2004 GENERAL MOTORS Express & Savana

Chevrolet Chevy Express H1500 2004 - BUZZERS, RELAYS & TIMERS

Chevrolet Chevy Express H1500 2004 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C	In underhood fuse block. See Fig. 1 .
Access Panel Relay - Left Side Front	In rear fuse block. See Fig. 3 .
Access Panel Relay - Left Side Rear	In rear fuse block. See Fig. 3 .
Access Panel Relay - Right Side	In rear fuse block. See Fig. 3 .
AUXILIARY	In body fuse block. See Fig. 2 .
CARGO UNLK	In body fuse block. See Fig. 2 .
CTSY LP	In body fuse block. See Fig. 2 .
DOOR LKS	In body fuse block. See Fig. 2 .
DRV UNLK	In body fuse block. See Fig. 2 .
FUEL PUMP	In underhood fuse block. See Fig. 1 .
HDLP-HIBM	In underhood fuse block. See Fig. 1 .
HDLP-LOBM	In underhood fuse block. See Fig. 1 .
High Speed Blower Motor Relay Connector - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 81 .
HORN	In underhood fuse block. See Fig. 1 .
Low Speed Blower Motor Relay Connector - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 81 .
Medium Speed Blower Motor Relay - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 81 .
PARK LP	In body fuse block. See Fig. 2 .
PASS UNLK	In body fuse block. See Fig. 2 .
RR DEFOG	In body fuse block. See Fig. 2 .
SPARE (2)	In underhood fuse block. See Fig. 1 .
STARTER	In underhood fuse block. See Fig. 1 .
Trailer Left Stop/Turn Relay	On left outer frame rail, near center of vehicle. See Fig. 11 .
Trailer Right Stop/Turn Relay	On left outer frame rail, near center of vehicle. See Fig. 11 .
WIND RAP	In body fuse block. See Fig. 2 .
WPR	In underhood fuse block. See Fig. 1 .

Chevrolet Chevy Express H1500 2004 - CIRCUIT PROTECTION DEVICES

Chevrolet Chevy Express H1500 2004 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Body Fuse Block	Under left front seat. See Fig. 18 .
Rear Fuse Block	On left "B" pillar. See Fig. 18 .
Underhood Fuse Block	On left side of engine compartment. See Fig. 5 .

Chevrolet Chevy Express H1500 2004 - CONTROL UNITS

Chevrolet Chevy Express H1500 2004 CONTROL UNITS LOCATION

Component	Location
Body Control Module	Behind lower right side of dash. See Fig. 18 .
Central Sequential Fuel Injection (Central SFI) Connector (4.3L VIN X)	At top of engine. See Fig. 36 .
Chime Module	Behind center of dash. See Fig. 76 .
Cruise Control Module (CCM)	Near brake fluid reservoir. See Fig. 62 .
Electronic Brake Control Module (EBCM)	On left frame rail, near center of vehicle. See Fig. 34 .
Fuel Injector Control Module (CNG)	On left side of radiator support. See Fig. 79 .
Ignition Coil/Module 1 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top left of engine. See Fig. 41 .
Ignition Coil/Module 2 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top right of engine. See Fig. 42 .
Ignition Coil/Module 3 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top left of engine. See Fig. 41 .
Ignition Coil/Module 4 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top right of engine. See Fig. 42 .
Ignition Coil/Module 5 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top left of engine. See Fig. 41 .
Ignition Coil/Module 6 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top right of engine. See Fig. 42 .
Ignition Coil/Module 7 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top left of engine. See Fig. 41 .
Ignition Coil/Module 8 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top right of engine. See Fig. 42 .
Ignition Control Module (ICM) Connector (4.3L VIN X)	On top right side of engine, at ignition coil. See Fig. 36 .
Inflatable Restraint I/P Module	Behind right side of dash. See Fig. 59 .
Inflatable Restraint I/P Module Connector	Behind right side of dash. See Fig. 25 .
Inflatable Restraint Sensing & Diagnostic Module (SDM)	Under left front seat. See Fig. 6 .
Inflatable Restraint Sensing & Diagnostic Module (SDM) Connector	Under left front seat. See Fig. 12 .
Inflatable Restraint Steering Wheel Module	At center of steering wheel. See Fig. 13 .
Powertrain Control Module (PCM)	In engine compartment, on left inner fender. See Fig. 38 .
Throttle Actuator Control (TAC) Module	At left rear of engine compartment. See Fig. 48 .
Turn Signal/Hazard Flasher Module connector	Behind left center of dash. See Fig. 24 .
Vehicle Communication Interface Module (VICM) (UE1)	Below steering column. See Fig. 68 .

Chevrolet Chevy Express H1500 2004 - MOTORS

Chevrolet Chevy Express H1500 2004 MOTORS LOCATION

Component	Location
Access Panel Actuators - Left Front Side Front	Behind left front access panel. See Fig. 18 .
Access Panel Actuators - Left Front Side Rear	Behind left front access panel. See Fig. 18 .
Access Panel Actuators - Left Rear Side Front	Behind left rear access panel. See Fig. 18 .
Access Panel Actuators - Left Rear Side Rear	Behind left rear access panel. See Fig. 18 .
Access Panel Actuators - Right Side Front	Behind right front access panel. See Fig. 17 .
Access Panel Actuators - Right Side Rear	Behind right rear access panel. See Fig. 17 .
Air Temperature Actuator Connector	Behind right side of dash, on HVAC assembly. See Fig. 25 .
Air Temperature Actuator Connector - Auxiliary (C69)	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 27 .
Blower Motor	On right rear of engine compartment, on evaporator case. See Fig. 23 .
Blower Motor Connector - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 27 .
Blower Motor Connector - Auxiliary	On rear auxiliary HVAC. See Fig. 81 .
Fuel Pump & Sender Assembly Connector	At fuel tank, under rear of vehicle. See Fig. 19 .
Mode Actuator Connector - Auxiliary (C69)	At rear auxiliary HVAC.
Precharge Pump	At left front of frame rail. See Fig. 31 .
Seat Motor - Forward/Rearward (AG1)	Under left front seat. See Fig. 58 .
Seat Motor - Forward/Rearward (AG2)	Under right front seat. See Fig. 60 .
Seat Motor - Front Tilt (AG1)	Under left front seat. See Fig. 58 .
Seat Motor - Front Tilt (AG2)	Under right front seat. See Fig. 60 .
Seat Motor - Rear Tilt (AG1)	Under left front seat. See Fig. 58 .
Seat Motor - Rear Tilt (AG2)	Under right front seat. See Fig. 60 .
Seat Motors Connector - Driver (AG1)	Under left front seat. See Fig. 58 .
Seat Motors Connector - Front Passenger (AG2)	Under right front seat. See Fig. 60 .
Starter (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At right rear of engine. See Fig. 35 .
Window Motor Connector - Driver (A31)	In driver door. See Fig. 64 .
Window Motor Connector - Front Passenger (A31)	In front passenger door. See Fig. 65 .
Windshield Washer Fluid Pump	On left front of engine compartment, at washer reservoir. See Fig. 78 .
Windshield Wiper Motor	On left side of firewall. See Fig. 62 .

Chevrolet Chevy Express H1500 2004 - SENDING UNITS & SENSORS

Chevrolet Chevy Express H1500 2004 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Position (APP) Sensor	Under left side of dash. See Fig. 49 .
Ambient Air Temperature Sensor	Behind front grille, on radiator support. See Fig. 77 .
Automatic Transmission (AT) Input Shaft Speed Sensor (ISS) Assembly (4L80-E)	On left side of transmission. See Fig. 56 .
Automatic Transmission (AT) Output Shaft Speed Sensor (ISS) Assembly (4L80-E)	At left rear of transmission. See Fig. 56 .
Automatic Transmission Fluid Temperature (TFT) Sensor (4L80-E)	Internal to transmission. See Fig. 56 .
Camshaft Position (CMP) Sensor Connector (4.3L VIN X)	Part of distributor, top rear of engine. See Fig. 9 .
Camshaft Position (CMP) Sensor Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top center rear of engine. See Fig. 10 .
Crankshaft Position (CKP) Sensor Connector (4.3L VIN X)	On lower front of engine, near crankshaft. See Fig. 20 .
Crankshaft Position (CKP) Sensor Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On lower right rear of engine, near starter motor. See Fig. 22 .
Engine Coolant Temperature (ECT) Sensor Connector (4.3L VIN X)	On left side of engine. See Fig. 21 .
Engine Coolant Temperature (ECT) Sensor Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At left front of engine. See Fig. 41 .
Engine Oil Pressure (EOP) Sensor Connector (4.3L VIN X)	On top rear of engine. See Fig. 9 .
Engine Oil Pressure (EOP) Sensor Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On top rear of engine. See Fig. 10 .
Fuel Pump & Sender Assembly Connector	In fuel tank, under rear of vehicle. See Fig. 40 .
Fuel Rail Pressure Sensor (CNG)	On right fuel rail. See Fig. 79 .
Fuel Tank Pressure (FTP) Sensor Connector	At fuel tank. See Fig. 19 .
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (4.3L VIN X)	In exhaust pipe, in front of catalytic converter. See Fig. 9 .
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (4.8L VIN V & 6.0L VIN U)	In exhaust pipe, in front of catalytic converter. See Fig. 50 .
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (4.3L VIN X & 5.3L VIN T)	In exhaust pipe, in front of catalytic converter. See Fig. 39 .
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (4.8L VIN V & 6.0L VIN U)	In exhaust pipe, in back of catalytic converter. See Fig. 50 .
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (4.3L VIN X & 5.3L VIN T)	In exhaust pipe, in back of catalytic converter. See Fig. 39 .
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (4.8L VIN V & 6.0L VIN U)	In exhaust pipe, in front of catalytic converter. See Fig. 50 .
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (4.3L VIN X & 5.3L VIN T)	In exhaust pipe, in front of catalytic converter. See Fig. 39 .
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (4.8L VIN V & 6.0L VIN U)	In exhaust pipe, in back of catalytic converter. See Fig. 50 .
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (4.3L VIN X & 5.3L VIN T)	In exhaust pipe, in back of catalytic converter. See Fig. 39 .
Inflatable Restraint Front End Sensor	On lower center of radiator support. See Fig. 59 .
Inflatable Restraint Seat Position Sensor (SPS) Connector - Left (Light Duty)	In left front seat. See Fig. 58 .
Inflatable Restraint Seat Position Sensor (SPS) Connector - Right (Light Duty)	In right front seat. See Fig. 60 .
Inflatable Restraint Seat Position Sensor (SPS) - Left (Light Duty)	In left seat. See Fig. 58 .
Inflatable Restraint Seat Position Sensor (SPS) - Right (Light Duty)	Under right front seat. See Fig. 60 .
Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor	Integral with mass airflow sensor. See Fig. 23 .
Knock Sensor (KS) Connector (4.3L VIN X)	On top left rear of engine. See Fig. 9 .
Knock Sensor (KS) 1 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	Below front of intake manifold. See Fig. 44 .
Knock Sensor (KS) 2 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	Below rear of intake manifold. See Fig. 44 .
Manifold Absolute Pressure (MAP) Sensor Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top rear of engine, on intake manifold. See Fig. 43 .
Manifold Air Pressure (MAP) Sensor Connector (4.3L VIN X)	At top rear of engine, on intake manifold. See Fig. 36 .
Passlock Sensor	Inside top of steering column. See Fig. 13 .
Steering Wheel Speed/Position Sensor	At base of steering column. See Fig. 32 .
Throttle Position (TP) Sensor Connector (4.3L VIN X)	At throttle position (TP) sensor. See Fig. 37 .
Throttle Position (TP) Sensor (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of throttle body. See Fig. 80 .
Vehicle Speed Sensor (VSS) (4L60-E/4L65-E)	On right side of transmission. See Fig. 52 .
VSS Sensor (4L60-E/4L65-E)	At left rear of transfer case. See Fig. 54 .
Wheel Speed Sensor (WSS) Connector - LF	On inside of left front wheel. See Fig. 11 .
Wheel Speed Sensor (WSS) Connector - RF	On inside of right front wheel. See Fig. 11 .
Wheel Speed Sensor (WSS) - LR	At left rear wheel hub. See Fig. 46 .
Wheel Speed Sensor (WSS) - RR	At right rear wheel hub. See Fig. 45 .
Yaw & Lateral Acceleration Sensor Connector (JL4)	Under front passenger seat. See Fig. 33 .

Chevrolet Chevy Express H1500 2004 - SOLENOIDS & SOLENOID VALVES

Chevrolet Chevy Express H1500 2004 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C Compressor Clutch Connector (C60) (4.3L VIN X)	At left front of engine. See Fig. 20 .
A/C Compressor Clutch Connector (C60) (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At lower right front of engine. See Fig. 22 .
A/T Shift Lock Control Solenoid Connector	On right side of steering column, under support bracket. See Fig. 51 .
Door Lock Actuator Connector - RR (AU3)	At front of right rear sliding door. See Fig. 74 .
Door Lock Actuator - LR (AU3)	At rear of left rear door. See Fig. 72 .
Door Lock Actuator - RR (AU3)	At rear of right rear door. See Fig. 73 .
Evaporative Emission (EVAP) Canister Purge Solenoid Connector (4.3L VIN X)	On top of engine, near throttle body. See Fig. 36 .
Evaporative Emission (EVAP) Canister Purge Solenoid (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On top of engine, near throttle body. See Fig. 80 .
Evaporative Emission (EVAP) Canister Vent Solenoid	Near front of fuel tank. See Fig. 34 .
Evaporative Emission (EVAP) Canister Vent Solenoid Connector	On EVAP canister, near front of fuel tank. See Fig. 11 .
Fuel Injector 1 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of intake manifold. See Fig. 41 .
Fuel Injector 2 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of intake manifold. See Fig. 42 .
Fuel Injector 3 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of intake manifold. See Fig. 41 .
Fuel Injector 4 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of intake manifold. See Fig. 42 .
Fuel Injector 5 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of intake manifold. See Fig. 41 .
Fuel Injector 6 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of intake manifold. See Fig. 42 .
Fuel Injector 7 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of intake manifold. See Fig. 41 .
Fuel Injector 8 Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of intake manifold. See Fig. 42 .
High Pressure Lock-Off Solenoids (CNG)	At left rear of vehicle. See Fig. 79 .
Idle Air Control (IAC) Valve Connector (4.3L VIN X)	At idle air control (IAC) valve. See Fig. 37 .
Idle Air Control (IAC) Valve (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left side of throttle body. See Fig. 80 .
Ignition Lock Cylinder Control Actuator	At top left of steering column. See Fig. 13 .
Low Pressure Lock-Off Solenoid (CNG)	On right side of fuel rail. See Fig. 79 .
Pressure Control (PC) Solenoid Valve Assembly (4L80-E)	Internal to transmission. See Fig. 57 .
Pressure Control (PC) Solenoid Valve (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
TCC PWM Solenoid Valve	On automatic transmission control valve body. See Fig. 55 .
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve Assembly (4L80-E)	Internal to transmission. See Fig. 57 .
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
Torque Converter Clutch (TCC) Solenoid Valve (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
1-2 Shift Solenoid (SS) Valve Assembly (4L80-E)	Internal to transmission. See Fig. 57 .
1-2 Shift Solenoid (SS) Valve (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
2-3 Shift Solenoid (SS) Valve Assembly (4L80-E)	Internal to transmission. See Fig. 56 .
2-3 Shift Solenoid (SS) Valve (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
3-2 Shift Solenoid (SS) Valve Assembly (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .

Chevrolet Chevy Express H1500 2004 - SWITCHES

Chevrolet Chevy Express H1500 2004 SWITCHES LOCATION

Component	Location
A/C High Pressure Switch Connector (C60) (4.3L VIN X)	On rear portion of A/C compressor. See Fig. 21 .
A/C High Pressure Switch Connector (C60) (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On rear portion of A/C compressor. See Fig. 22 .
A/C Low Pressure Switch (C60)	On side of accumulator. See Fig. 23 .
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L60-E/4L65-E)	Internal to transmission. See Fig. 52 .
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L80-E)	Internal to transmission. See Fig. 56 .
Brake Fluid Level Switch Connector	On brake master cylinder reservoir. See Fig. 28 .
Brake Fluid Level Switch Connector (Heavy Duty)	At left rear of engine compartment. See Fig. 47 .
Brake Pressure Differential Switch Connector (Light Duty)	On brake valve, near front of EBCM. See Fig. 11 .
Door Ajar Switch Connector - LR (E26)	At base of left "B" pillar. See Fig. 15 .
Door Ajar Switch - RR (Passenger/Cargo)	At right "B" pillar. See Fig. 33 .
Engine Oil Level Switch Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of oil pan. See Fig. 22 .
Engine Oil Level Switch Connector (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right side of oil pan. See Fig. 35 .
Engine Oil Level Switch (5.3L VIN T)	On right side of oil pan.
Engine Oil Level Switch (6.0L VIN U)	On right side of oil pan.
Ignition Key Alarm Switch	Inside top of steering column. See Fig. 13 .
Inflatable Restraint Seat Position Switch (Left/Right)	On respective seat track.
Mini-Wedge Door Jamb Switch - Cargo	At right rear cargo door latch. See Fig. 66 .
Mini-Wedge Door Jamb Switch - Driver	At rear of driver door. See Fig. 70 .
Mini-Wedge Door Jamb Switch - Passenger	At rear of front passenger door. See Fig. 71 .
Park Brake Switch Connector	Under left side of dash. See Fig. 30 .
Park/Neutral Position (PNP) Switch (4.3L VIN X & 5.3L VIN T)	On left side of transmission. See Fig. 39 .
PNP Switch (4L60-E/4L65-E)	On left side of transmission. See Fig. 53 .
Power Brake (PB) Booster Fluid Flow Alarm Switch - C1, C2	Near power steering pump, in outlet hose. See Fig. 29 .
Power Brake (PB) Booster Fluid Pressure Alarm Switch Connector	Near power brake booster, in booster inlet hose. See Fig. 29 .
Seat Belt Switch - LF	In left front seat belt latch. See Fig. 58 .
Stop Lamp Switch Connector	Behind left side of dash, above brake pedal. See Fig. 69 .

Chevrolet Chevy Express H1500 2004 - MISCELLANEOUS

Chevrolet Chevy Express H1500 2004 MISCELLANEOUS LOCATION

Component	Location
Antenna	At right rear of engine compartment. See Fig. 63 .
Auxiliary Blower Motor Resistor Assembly Connector - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 27 .
Auxiliary Power Outlet Connector	Behind right side of dash. See Fig. 25 .
Battery	At right front of engine compartment. See Fig. 4 .
Battery Cable (+)	At battery. See Fig. 4 .
Battery Cable (-)	At battery. See Fig. 4 .
Blower Motor Resistor Assembly	At right rear of engine compartment, on evaporator case. See Fig. 23 .
Cellular Antenna Connector (UE1)	At right front of roof. See Fig. 61 .
Cellular Telephone Microphone Connector (UE1)	At top of right "A" pillar. See Fig. 61 .
Data Link Connector (DLC)	Under left side of dash. See Fig. 69 .
Generator Connector (4.3L VIN X)	At top right front of engine. See Fig. 36 .
Generator (4.3L VIN X)	At left front of engine. See Fig. 20 .
Generator (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	At top left front of engine. See Fig. 80 .
High Pressure Lock-Off (CNG)	Threaded into CNG tank end.
Horn Assembly	At left front of engine compartment. See Fig. 75 .
Horn Assembly (B3D)	At left front of engine compartment. See Fig. 75 .
Horn Assembly Connector (C60)	At left rear of engine compartment. See Fig. 38 .
Ignition Coil Connector (4.3L VIN X)	On top right side of engine. See Fig. 36 .
Inflatable Restraint Steering Wheel Module Coil	At top of steering column. See Fig. 59 .
Navigation Antenna Connector (UE1)	At center front of roof. See Fig. 61 .
Outside Rearview Mirror Connector - Driver (DE5/DE7)	In driver door. See Fig. 64 .
Outside Rearview Mirror Connector - Passenger (DE5/DE7)	In right front passenger door. See Fig. 65 .
Remote Control Door Lock Receiver (RCDLR) Connector (AU0)	Behind center of dash. See Fig. 24 .
Seat Belt Pretension Connector - LF (Light Duty)	On right side of left front seat. See Fig. 12 .
Seat Belt Pretensioner - RF (Light Duty)	On right side of right front seat. See Fig. 33 .

Chevrolet Chevy Express H1500 2004 - CONNECTORS

Chevrolet Chevy Express H1500 2004 CONNECTORS LOCATION

Component	Location
C100 (W/JL4) (Black, 14 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 38 .
C100 (W/O JL4) (Black, 30 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 38 .
C101 (Black, 30 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 11 .
C101 (W/O JL4) (Black, 16 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 11 .
C103 (Black, 2 Pin)	Near top center of engine. See Fig. 41 .
C104 (Heavy Duty) (Black, 2 Pin)	Near left side of radiator support. See Fig. 84 .
C104 (Light Duty) (Yellow, 2 Pin)	Near left side of radiator support. See Fig. 84 .
C109 (Black, 2 Pin)	At left rear of engine compartment, near underhood lamp. See Fig. 28 .
C126 (Light Gray, 8 Pin)	On top of left valve cover. See Fig. 41 .
C127 (Light Gray, 8 Pin)	On top of right valve cover. See Fig. 42 .
C128 (Black, 8 Pin)	Rear oxygen sensor harness, near right frame rail. See Fig. 50 .
C141 (Light Gray, 2 Pin)	At left rear of engine compartment, near firewall. See Fig. 29 .
C175 (4L60-E) (Gray, 20 Pin)	On right side of transmission. See Fig. 82 .
C175 (4L80-E) (Gray, 20 Pin)	On left side of transmission. See Fig. 83 .
C200 (Black, 48 Pin)	At base of steering column. See Fig. 24 .
C201 (UE1) (1 Pin)	At right kick panel. See Fig. 14 .
C202 (UE1) (1 Pin)	At right kick panel. See Fig. 14 .
C203 (YF7/DH6) (Black, 2 Pin)	Near top of right "B" pillar. See Fig. 15 .
C220 (Gray, 2 Pin)	Behind left side of dash, above parking brake. See Fig. 30 .
C221 (Light Gray, 6 Pin)	Behind left side of dash, above brake pedal. See Fig. 69 .
C222 (Black, 4 Pin)	Behind left side of dash, near parking brake.
C225 (Black, 12 Pin)	Behind right kick panel. See Fig. 14 .
C300 (Light Duty) (Yellow, 2 Pin)	Near body fuse block. See Fig. 12 .
C303 (YF7/C69 W/Rear Auxiliary Controls) (Black, 6 Pin)	Near top of left "B" pillar. See Fig. 15 .
C304 (W/O YF7) (Black, 12 Pin)	Near top of left "B" pillar. See Fig. 85 .
C306 (Black, 12 Pin)	Below right front seat. See Fig. 33 .
C307 (Heavy Duty) (Black, 4 Pin)	Below left front seat. See Fig. 58 .
C307 (Light Duty) (Black, 6 Pin)	Below left front seat. See Fig. 58 .
C311 (Black, 40 Pin)	Behind left kick panel. See Fig. 30 .
C312 (Black, 18 Pin)	Behind right kick panel. See Fig. 33 .
C318 (Light Gray, 40 Pin)	Behind left kick panel. See Fig. 12 .
C319 (C36/ENC) (Black, 8 Pin)	Behind left kick panel. See Fig. 87 .
C320 (Black, 16 Pin)	Near base of left "C" pillar. See Fig. 88 .
C321 (Black, 4 Pin)	Near center of left "C" pillar. See Fig. 88 .
C400 (Black, 8 Pin)	Near center of right "D" pillar. See Fig. 16 .
C405 (Black, 10 Pin)	Chassis harness to cutaway rear lighting connector, near left rear frame rail. See Fig. 19 .
C407 (Black, 2 Pin)	On rear auxiliary HVAC. See Fig. 81 .
C407 (ENC) (Light Gray, 6 Pin)	Near auxiliary HVAC assembly. See Fig. 15 .
C407 (W/O Auxiliary HVAC) (Light Gray, 6 Pin)	Near base of left "B" pillar.
C409 (Black, 2 Pin)	Near auxiliary HVAC assembly. See Fig. 88 .
C409 (W/O Auxiliary HVAC) (Black, 2 Pin)	Near base of left "B" pillar.
C409 (135 Wheel Base - C36/C69) (Black, 2 Pin)	At left rear corner of vehicle. See Fig. 16 .
C411 (Black, 6 Pin)	Near center of left "D" pillar. See Fig. 16 .
C412 (Black, 3 Pin)	Near center of right "D" pillar. See Fig. 16 .
C413 (Black, 2 Pin)	At left rear frame rail. See Fig. 86 .
C414 (Black, 2 Pin)	At right rear frame rail. See Fig. 86 .
C415 (Black, 4 Pin)	At rear of vehicle, on center of rear roof rail. See Fig. 16 .
C417 (Black, 2 Pin)	Near top of left "C" pillar.
C419 (Black, 2 Pin)	At rear of vehicle, on center of rear roof rail. See Fig. 16 .
C420 (C69/Rear Auxiliary controls W/O YF7) (Black, 12 Pin)	Near top of right "B" pillar. See Fig. 85 .

Chevrolet Chevy Express H1500 2004 - GROUNDS

Chevrolet Chevy Express H1500 2004 GROUNDS LOCATION

Component	Location
G100	On left front of engine compartment. See Fig. 7 .
G101	On right front of engine compartment. See Fig. 7 .
G102 (4.3L VIN X)	On left rear of engine. See Fig. 9 .
G102 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On left rear of engine. See Fig. 10 .
G103 (4.3L VIN X)	On right rear of engine. See Fig. 9 .
G103 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	On right rear of engine. See Fig. 10 .
G104	On lower right front of engine. See Fig. 8 .
G105	On right front frame rail, in engine compartment. See Fig. 8 .
G106	On right front of engine compartment. See Fig. 4 .
G300	On left frame rail, near EBCM. See Fig. 11 .
G301	Behind left kick panel. See Fig. 12 .
G302	Behind left kick panel. See Fig. 12 .
G303	Behind left kick panel. See Fig. 12 .
G304	Behind right kick panel. See Fig. 14 .
G347	On bottom of left "B" pillar. See Fig. 15 .
G400	On inner left rear frame rail. See Fig. 19 .
G401	On top of right "D" pillar. See Fig. 16 .
G402	On top of left "D" pillar. See Fig. 16 .
G403	On center of left "D" pillar. See Fig. 18 .

Chevrolet Chevy Express H1500 2004 - SPLICES

Chevrolet Chevy Express H1500 2004 SPLICES LOCATION

Component	Location
SP200	In dash wiring harness, 10 cm from underhood pass-through grommet breakout. See Fig. 12 .
SP347	In body harness, 19 cm from C308 breakout. See Fig. 15 .
S101 (4.3L VIN X)	In engine harness, 43 cm from underhood lamp breakout. See Fig. 37 .
S101 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	In engine harness, 4 cm from knock sensor breakout. See Fig. 41 .
S102 (4.3L VIN X)	In engine harness, 6 cm from generator connector breakout. See Fig. 36 .
S102 (4.8L VIN V, 5.3L VIN T & 6.0L VIN U)	In engine harness, 8 cm from knock sensor breakout. See Fig. 41 .
S110	In forward lamp harness, 12 cm from left headlamp connector breakout. See Fig. 7 .
S118	In forward lamp harness, 13 cm from right headlamp connector breakout. See Fig. 7 .
S135	Inside transmission.
S182	In odd ignition/coil module jumper harness, on top left side of engine.
S183	In even ignition/coil module jumper harness, on top right side of engine.
S184	In odd ignition/coil module jumper harness, on top left side of engine.
S185	In even ignition/coil module jumper harness, on top right side of engine.
S187	In odd ignition/coil module jumper harness, on top left side of engine.
S188	In even ignition/coil module jumper harness, on top right side of engine.
S204	In vanity mirror lamp harness, 13 cm from C203.
S231	In dash harness, 23 cm from C200.
S245 (DE7)	In dash harness, 13 cm from radio & HVAC control assembly breakout. See Fig. 24 .
S246 (DE7)	In dash harness, 6 cm from radio & HVAC control assembly breakout. See Fig. 25 .
S247	In dash harness, 36 cm from C200 breakout.
S248	In dash harness, 8 cm from C200 breakout. See Fig. 67 .
S249	In dash harness, 5 cm from inflatable restraint dash module connector breakout. See Fig. 25 .
S250	In dash harness, 5 cm from air temperature actuator connector breakout. See Fig. 25 .
S264	In steering column harness, 29 cm from C200.
S300	In PRP/UF2 harness, 42 cm from left front side front access panel actuator. See Fig. 18 .
S301 (Cutaway)	In chassis harness, 87 cm from EBCM connector breakout.
S301 (Passenger/Cargo)	In chassis harness, 44 cm from EBCM connector breakout. See Fig. 11 .
S302 (UF2)	In PRP/UF2 harness, 15 cm from rear fuse block. See Fig. 18 .
S303	In PRP/UF2 harness, 8 cm from rear fuse block. See Fig. 18 .
S304 (AG1)	In driver seat harness, 11 cm from driver seat adjuster switch connector breakout. See Fig. 58 .
S305 (Rear Auxiliary Controls W/YF7)	In upfitter HVAC control harness, 39 cm from C303 breakout. See Fig. 26 .
S305 (W/O RV Upfitter Option)	In front headliner harness, 31 cm from C304 breakout.
S306 (Rear Auxiliary Controls W/YF7)	In upfitter HVAC control harness, 19 cm from C303 breakout. See Fig. 26 .
S306 (W/O RV Upfitter Option)	In front headliner harness, 42 cm from C304 breakout.
S307 (Rear Auxiliary Controls W/YF7)	In upfitter HVAC control harness, 88 cm from C303 breakout. See Fig. 26 .
S307 (W/O RV Upfitter Option)	In front headliner harness, 52 cm from C304 breakout.
S308 (W/O RV Upfitter Option)	In body harness, 5 cm from C304 breakout. See Fig. 15 .
S308 (W/RV Upfitter Option)	In body harness, 22 cm from C308 breakout. See Fig. 15 .
S309	In PRP/UF2 harness, between left side front access panel actuators. See Fig. 18 .
S310 (W/O RV Upfitter Option)	In body harness, 31 cm from C304 breakout. See Fig. 15 .
S310 (W/RV Upfitter Option)	In body harness, 32 cm from C308 breakout. See Fig. 15 .
S311 (W/O RV Upfitter Option)	In body harness, 41 cm from C304 breakout. See Fig. 15 .
S311 (W/RV Upfitter Option)	In body harness, 22 cm from C308 breakout. See Fig. 15 .
S312	In PRP/UF2 harness, 7 cm from breakout for rear fuse block.
S313 (Light Duty)	In body harness, 11 cm form C307. See Fig. 87 .
S314	In vanity mirror lamp harness, 34 cm from front courtesy & reading lamp connector breakout. See Fig. 26 .
S315	In chassis harness, 10 cm from G300 breakout.
S330	In rear headliner harness, 30 cm from C420.
S331	In vanity mirror lamp harness, 42 cm from left vanity mirror lamp connector breakout.
S332 (Passenger)	In front headliner harness, 6 cm from C304 breakout. See Fig. 85 .
S348 (UF2)	In PRP/UF2 harness, 19 cm from left front dome fluorescent work lamp connector. See Fig. 17 .
S350 (UF2)	In PRP/UF2 harness, 12 cm from left front dome fluorescent work lamp connector. See Fig. 17 .
S354 (Rear Auxiliary Controls W/YF7)	In upfitter HVAC control harness, 64 cm from C303 breakout. See Fig. 26 .
S354 (W/O RV Upfitter Option)	In front headliner harness, 11 cm from C304 breakout.
S355 (Rear Auxiliary Controls W/YF7)	In upfitter HVAC control harness, 11 cm from auxiliary HVAC control processor connector breakout. See Fig. 26 .
S355 (W/O RV Upfitter Option)	In front headliner harness, 21 cm from C304 breakout.
S401	In body harness, 16 cm from CHMSL connector breakout. See Fig. 16 .
S402	In chassis harness, 9 cm from fuel pump & sender assembly breakout.
S403 (W/O YF7)	In body harness, 6 cm from G401 breakout. See Fig. 16 .
S404	In body harness, 38 cm G402 breakout. See Fig. 16 .
S405	In rear HVAC harness, 13 cm from auxiliary blower motor connector breakout. See Fig. 81 .
S406	In front headliner harness, 24 cm from front courtesy & reading lamp connector.
S407	In rear headliner harness, 44 cm from C420.
S408	In PRP/UF2 harness, between left side rear access panel actuators. See Fig. 18 .
S409	In PRP/UF2 harness, 88 cm from right dome fluorescent work lamp connector breakout. See Fig. 18 .
S410	In chassis harness, between underhood fuse block & fuel pump sender assembly.
S411 (C69)	In rear HVAC harness, 6 cm from auxiliary blower motor connector breakout. See Fig. 81 .
S412	In rear HVAC harness, 20 cm from auxiliary blower motor connector breakout. See Fig. 81 .
S413	In rear HVAC harness, 24 cm from auxiliary blower motor breakout. See Fig. 27 .
S450	In body harness, 10 cm from CHMSL connector breakout. See Fig. 16 .
S451	In body harness, 10 cm from C415 breakout. See Fig. 16 .
S452	In body harness, 52 cm from C417 breakout.
S453	In body harness, 46 cm from C417 breakout.
S500 (AU3)	In left front door harness, 6 cm from left front door speaker breakout. See Fig. 64 .
S502 (DE5/DE7)	In left front door harness, 16 cm from driver's outside rearview mirror connector. See Fig. 64 .
S600 (AU3)	In right front door harness, 7 cm from right front door speaker breakout. See Fig. 65 .
S902	In right rear door harness, 19 cm from license lamp connector breakout. See Fig. 66 .