Chevrolet Chevy Express H1500 2007 - 2007 GENERAL MOTORS Express & Savana

Chevrolet Chevy Express H1500 2007 - BUZZERS, RELAYS & TIMERS

Chevrolet Chevy Express H1500 2007 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
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.
A/C Relay (54)	In underhood fuse block. See Fig. 1.
AUX Relay (24)	In body fuse block. See Fig. 2.
CARGO UNLCK Relay (27)	In body fuse block. See Fig. 2.
Chime Module	Behind left center of dash. See Fig. 89.
Cooling Fan Relay	Right of cooling fan assembly. See Fig. 97.
CTSY LAMP Relay (26)	In body fuse block. See Fig. 2.
Dome Fluorescent Work Lamps Relay	At left "B" pillar. See Fig. 17.
DR/LCKS Relay (30)	In body fuse block. See Fig. 2.
DRV UNLCK Relay (28)	In body fuse block. See Fig. 2.
ECM (D) Relay	In underhood fuse block. See Fig. 1.
FUEL PMP Relay (57)	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. 70.
HORN Relay (59)	In underhood fuse block. See Fig. 1.
LAMP - HI BEAM Relay (56)	In underhood fuse block. See Fig. 1.
LAMP - LO BEAM Relay (58)	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. 70.
Medium Speed Blower Motor Relay - Auxiliary	On left rear of passenger compartment, on auxiliary HVAC assembly. See Fig. 70.
PARK LAMP Relay (29)	In body fuse block. See Fig. 2.
PASS UNLCK Relay (31)	In body fuse block. See Fig. 2.
RAP Relay (23)	In body fuse block. See Fig. 2.
REAR DEFOG Relay (25)	In body fuse block. See Fig. 2.
REAR FOG LAMPS Relay (Diesel) (55)	In underhood fuse block. See Fig. 1.
SPARE (G) Relay	In underhood fuse block. See Fig. 1.
SPARE Relay (55)	In underhood fuse block. See Fig. 1.
STRTR Relay	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.
WSW Relay (53)	In underhood fuse block. See Fig. 1.

Chevrolet Chevy Express H1500 2007 - CIRCUIT PROTECTION DEVICES

Chevrolet Chevy Express H1500 2007 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse Block - Body	Under left front seat. See Fig. 17.
Fuse Block - Rear	On left "B" pillar. See Fig. 17.
Fuse Block - Underhood	On left side of engine compartment. See Fig. 5.

Chevrolet Chevy Express H1500 2007 - CONTROL UNITS

Chevrolet Chevy Express H1500 2007 CONTROL UNITS LOCATION

Component	Location
Body Control Module (BCM)	Behind lower right side of dash. See Fig. 88.
Central Sequential Fuel Injection (Central SFI) Connector (4.3L)	At top of engine. See Fig. 32.
Coolant Heater Control	On coolant heater assembly. See Fig. 99.
Cruise Control Module (CCM)	Near brake fluid reservoir. See Fig. 55.
Electronic Brake Control Module (EBCM)	On left frame rail, near center of vehicle.
Electronic Control Module (ECM)	Left side of engine compartment. See Fig. 78.
Glow Plug Control Module (GPCM) (6.6L)	Top rear of engine. See Fig. 93.
Glow Plug Control Module (GPCM) (6.6L Turbo)	Left rear of engine. See Fig. 82.
HVAC Control Processor - Auxiliary	Center front of headliner. See Fig. 101.
Ignition Coil/Module 1 Connector (4.8L, 5.3L & 6.0L)	At top left of engine. See Fig. 37.
Ignition Coil/Module 2 Connector (4.8L, 5.3L & 6.0L)	At top right of engine. See Fig. 38.
Ignition Coil/Module 3 Connector (4.8L, 5.3L & 6.0L)	At top left of engine. See Fig. 37.
Ignition Coil/Module 4 Connector (4.8L, 5.3L & 6.0L)	At top right of engine. See Fig. 38.
Ignition Coil/Module 5 Connector (4.8L, 5.3L & 6.0L)	At top left of engine. See Fig. 37.
Ignition Coil/Module 6 Connector (4.8L, 5.3L & 6.0L)	At top right of engine. See Fig. 38.
Ignition Coil/Module 7 Connector (4.8L, 5.3L & 6.0L)	At top left of engine. See Fig. 37.
Ignition Coil/Module 8 Connector (4.8L, 5.3L & 6.0L)	At top right of engine. See Fig. 38.
Ignition Control Module (ICM) Connector	On top right side of engine, at ignition coil. See Fig. 32.
Inflatable Restraint I/P Module	Behind right side of dash. See Fig. 52.
Inflatable Restraint I/P Module Connector	Behind right side of dash. See Fig. 24.
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.
Intake Air Heater (IAH) Module	Between the intake manifold tube and the air cooler outlet duct. See Fig. 82.
Powertrain Control Module (PCM)	In engine compartment, on left inner fender. See Fig. 34.
Throttle Actuator Control (TAC) Module	At left rear of engine compartment. See Fig. 42.
Transmission Control Module (TCM) (6.6L)	Left front corner of engine compartment. See Fig. 79.
Turn Signal/Hazard Flasher Module	Behind left center of dash. See Fig. 89.
Vehicle Communication Interface Module (VICM)	Below steering column. See Fig. 23.

Chevrolet Chevy Express H1500 2007 - MOTORS

Chevrolet Chevy Express H1500 2007 MOTORS LOCATION

Component	Location
Access Panel Actuators - Left Front Side Front	Behind left front access panel. See Fig. 17.
Access Panel Actuators - Left Front Side Rear	Behind left front access panel. See Fig. 17.
Access Panel Actuators - Left Rear Side Front	Behind left rear access panel. See Fig. 17.
Access Panel Actuators - Left Rear Side Rear	Behind left rear access panel. See Fig. 17.
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	Behind right side of dash, on HVAC. See Fig. 100.
Air Temperature Actuator Connector	Behind right side of dash, on HVAC assembly. See Fig. 24.
Air Temperature Actuator Connector - Auxiliary (Rear A/C)	On auxiliary HVAC assembly. See Fig. 102.
Blower Motor	On right rear of engine compartment, on evaporator case. See Fig. 22.
Blower Motor Connector - Auxiliary	On auxiliary HVAC. See Fig. 102.
Blower Motor (Coolant Heater)	On coolant heater assembly. See Fig. 99.
Cooling Fan Assembly	Behind radiator. See Fig. 97.
Fuel Pump (Coolant Heater)	On coolant heater assembly. See Fig. 99.
Fuel Pump & Sender Assembly Connector (57 Gal Fuel Tank)	At fuel tank. See Fig. 90.
Fuel Pump & Sender Assembly (Gas)/Fuel Level Sensor (Diesel) Connector	On fuel tank. See Fig. 36.
Fuel Pump (6.6L)	Left center inner frame rail. See Fig. 84.
Precharge Pump	At left front of frame rail. See Fig. 29.
Recirculation Actuator	Behind right side of dash, on HVAC. See Fig. 100.
Seat Motor - Forward/Rearward	Under left front seat. See Fig. 51.
Seat Motor - Forward/Rearward	Under right front seat. See Fig. 53.
Seat Motor - Front Tilt	Under left front seat. See Fig. 51.
Seat Motor - Front Tilt	Under right front seat. See Fig. 53.
Seat Motor - Rear Tilt	Under left front seat. See Fig. 51.
Seat Motor - Rear Tilt	Under right front seat. See Fig. 53.
Seat Motors Connector - Driver	Under left front seat. See Fig. 51.
Seat Motors Connector - Front Passenger	Under right front seat. See Fig. 53.
Starter (4.8L, 5.3L & 6.0L)	At right rear of engine. See Fig. 21.
Starter (6.6L)	Lower right side of engine. See Fig. 80.
Vacuum Pump	Right front of engine compartment, under battery. See Fig. 83.
Window Motor Connector - Driver	In driver door. See Fig. 57.
Window Motor Connector - Front Passenger	In front passenger door. See Fig. 58.
Windshield Washer Fluid Pump	On left front of engine compartment, at washer reservoir. See Fig. 68.
Windshield Wiper Motor	On left side of firewall. See Fig. 55.

Chevrolet Chevy Express H1500 2007 - SENDING UNITS & SENSORS

Chevrolet Chevy Express H1500 2007 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Position (APP) Sensor	Under left side of dash. See Fig. 43.
Air Temperature Sensor (Coolant)	On coolant heater assembly. See Fig. 99.
Air Temperature Sensor (Overheat)	On coolant heater assembly. See Fig. 99.
Ambient Air Temperature Sensor	Behind front grille, on radiator support. See Fig. 67.
Automatic Transmission (AT) Input Shaft Speed Sensor (ISS) Assembly	On left side of transmission. See Fig. 50.
Automatic Transmission (AT) Output Shaft Speed Sensor (OSS) Assembly	At left rear of transmission. See Fig. 50.
Automatic Transmission Fluid Temperature (TFT) Sensor	Internal to transmission. See Fig. 50.
Camshaft Position (CMP) Sensor Connector (4.3L)	Part of distributor, top rear of engine. See Fig. 9.
Camshaft Position (CMP) Sensor Connector (4.8L, 5.3L & 6.0L)	At top center rear of engine. See Fig. 10.
Camshaft Position (CMP) Sensor (6.6L)	On front of engine. See Fig. 80.
Combustion Sensor	On coolant heater assembly. See Fig. 99.
Crankshaft Position (CKP) Sensor Connector (4.3L)	On lower front of engine, near crankshaft. See Fig. 19.
Crankshaft Position (CKP) Sensor Connector (4.8L, 5.3L & 6.0L)	On lower right rear of engine, near starter motor. See Fig. 21.
Crankshaft Position (CKP) Sensor (6.6L)	Next to crankshaft pulley. See Fig. 80.
DPF Differential Pressure Sensor	On right frame rail. See Fig. 96.
Engine Coolant Temperature (ECT) Sensor Connector (4.3L)	On left side of engine. See Fig. 20.
Engine Coolant Temperature (ECT) Sensor Connector (4.8L, 5.3L & 6.0L)	At left front of engine. See Fig. 37.
Engine Coolant Temperature (ECT) Sensor 1 (6.6L)	Top front of engine, near thermostat housing. See Fig. 94.
Engine Coolant Temperature (ECT) Sensor 2 (6.6L)	Top front of engine, near thermostat housing. See Fig. 94.
Engine Coolant Temperature (ECT) Sensor (6.6L Turbo)	Top of engine, near thermostat housing. See Fig. 82.
Engine Oil Pressure (EOP) Sensor Connector (4.3L)	On top rear of engine. See Fig. 9.
Engine Oil Pressure (EOP) Sensor Connector (4.8L, 5.3L & 6.0L)	On top rear of engine. See Fig. 10.
Engine Oil Pressure (EOP) Sensor (6.6L)	Lower left side of engine. See Fig. 81.
Exhaust Gas Temperature (EGT) Sensor - 1	In exhaust, upstream of particulate filter. See Fig. 96.
Exhaust Gas Temperature (EGT) Sensor - 2	In exhaust, downstream of particulate filter. See Fig. 96.
Fuel Level Sensor Connector	On left frame rail. See Fig. 84.
Fuel Pump & Sender Assembly (Gas)/Fuel Level Sensor (Diesel) Connector	On fuel tank. See Fig. 36.
Fuel Rail Pressure (FRP) Sensor (6.6L)	Top rear of engine. See Fig. 95.
Fuel Rail Pressure (FRP) Sensor (6.6L Turbo)	On top right side of engine. See Fig. 82.
Fuel Rail Temperature (FRT) Sensor	On top left side of engine. See Fig. 82.
Fuel Tank Pressure (FTP) Sensor Connector (Gas) (Except 57 Gal Fuel Tank)	On fuel tank. See Fig. 36.
Fuel Tank Pressure (FTP) Sensor Connector (57 Gal Fuel Tank)	At fuel tank. See Fig. 90.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (4.3L)	In exhaust pipe, in front of catalytic converter. See Fig. 9.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (4.8L & 6.0L)	In exhaust pipe, in front of catalytic converter. See Fig. 44.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (4.3L & 5.3L)	In exhaust pipe, in front of catalytic converter. See Fig. 35.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (4.8L & 6.0L)	In exhaust pipe, in back of catalytic converter. See Fig. 44.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (4.3L & 5.3L)	In exhaust pipe, in back of catalytic converter. See Fig. 35.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (4.8L & 6.0L)	In exhaust pipe, in front of catalytic converter. See Fig. 44.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (4.3L & 5.3L)	In exhaust pipe, in front of catalytic converter. See Fig. 35.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (4.8L & 6.0L)	In exhaust pipe, in back of catalytic converter. See Fig. 44.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (4.3L & 5.3L)	In exhaust pipe, in back of catalytic converter. See Fig. 35.
Inflatable Restraint Front End Sensor	On lower center of radiator support. See Fig. 52.
Inflatable Restraint Seat Position Sensor (SPS) Connector - Left (Light Duty)	In left front seat. See Fig. 51.
Inflatable Restraint Seat Position Sensor (SPS) Connector - Right (Light Duty)	In right front seat. See Fig. 53.
Inflatable Restraint Seat Position Sensor (SPS) - Left (Light Duty)	In left seat. See Fig. 51.
Inflatable Restraint Seat Position Sensor (SPS) - Right (Light Duty)	Under right front seat. See Fig. 53.
Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor	Integral with mass airflow sensor. See Fig. 22.
Intake Air Temperature (IAT) Sensor 2 (6.6L)	Top left side of engine. See Fig. 93.
Intake Air Temperature (IAT) Sensor 2 (6.6L Turbo)	At front of turbocharger. See Fig. 82.
Knock Sensor (KS) Connector	On top left rear of engine. See Fig. 9.
Knock Sensor (KS) 1 (4.8L, 5.3L & 6.0L)	Below front of intake manifold. See Fig. 40.
Knock Sensor (KS) 2 (4.8L, 5.3L & 6.0L)	Below rear of intake manifold. See Fig. 40.
Manifold Absolute Pressure (MAP) Sensor Connector (4.8L, 5.3L & 6.0L)	At top rear of engine, on intake manifold. See Fig. 39.
Manifold Absolute Pressure (MAP) Sensor (6.6L Turbo)	Attached to intake manifold tube. See Fig. 82.
Manifold Air Pressure (MAP) Sensor Connector	At top rear of engine, on intake manifold. See Fig. 32.
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor	Left front of engine compartment. See Fig. 78.
Passlock Sensor	Inside top of steering column. See Fig. 13.
Steering Wheel Speed/Position Sensor	At base of steering column. See Fig. 30.
Throttle Position (TP) Sensor Connector (4.3L)	At throttle position (TP) sensor. See Fig. 33.
Throttle Position (TP) Sensor (4.8L, 5.3L & 6.0L)	On left side of throttle body. See Fig. 69.
Turbocharger Vane Position Sensor	On top of turbocharger. See Fig. 82.
Vehicle Speed Sensor (VSS) (4L60-E/4L65-E/4L70-E)	On right side of transmission. See Fig. 46.
VSS Sensor (4L60-E/4L65-E/4L70-E)	At left rear of transfer case. See Fig. 48.
Wheel Speed Sensor (WSS) Connector - LF	On inside of left front wheel. See Fig. 87.
Wheel Speed Sensor (WSS) Connector - RF	On inside of right front wheel. See Fig. 87.
Wheel Speed Sensor (WSS) - LR	At left rear wheel hub. See Fig. 87.
Wheel Speed Sensor (WSS) - RR	At right rear wheel hub. See Fig. 87.
Yaw & Lateral Acceleration Sensor	Under front passenger seat. See Fig. 87.

Chevrolet Chevy Express H1500 2007 - SOLENOIDS & SOLENOID VALVES

Chevrolet Chevy Express H1500 2007 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C Compressor Clutch Connector (4.3L)	At left front of engine. See Fig. 19.
A/C Compressor Clutch Connector (4.8L, 5.3L & 6.0L)	At lower right front of engine. See Fig. 21.
A/C Compressor Clutch Connector (6.6L)	Top front of engine. See Fig. 98.
A/T Shift Lock Control Solenoid Connector	On right side of steering column, under support bracket. See Fig. 45.
Door Lock Actuator - LR Side	Rear of left door. See Fig. 63.
Door Lock Actuator - RR Side	Right side of door. See Fig. 65.
Door Lock Actuator - RR Side (Hinged)	At left side of right door. See Fig. 64.
Evaporative Emission (EVAP) Canister Purge Solenoid Connector (4.3L)	On top of engine, near throttle body. See Fig. 32.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve (4.8L, 5.3L & 6.0L)	On top of engine, near throttle body. See Fig. 91.
Evaporative Emission (EVAP) Canister Vent Solenoid	Near front of fuel tank.
Evaporative Emission (EVAP) Canister Vent Solenoid Connector	On EVAP canister, near front of fuel tank. See Fig. 11.
Exhaust Gas Recirculation (EGR) Valve	Right side of the engine above the #1 cylinder. See Fig. 82.
Fuel Injector 1 Connector (4.8L, 5.3L & 6.0L)	On left side of intake manifold. See Fig. 37.
Fuel Injector 1 (6.6L)	On right side of engine. See Fig. 80.
Fuel Injector 2 Connector (4.8L, 5.3L & 6.0L)	On right side of intake manifold. See Fig. 38.
Fuel Injector 2 (6.6L)	On left side of engine. See Fig. 81.
Fuel Injector 3 Connector (4.8L, 5.3L & 6.0L)	On left side of intake manifold. See Fig. 37.
Fuel Injector 3 (6.6L)	On right side of engine. See Fig. 80.
Fuel Injector 4 Connector (4.8L, 5.3L & 6.0L)	On right side of intake manifold. See Fig. 38.
Fuel Injector 4 (6.6L)	On left side of engine. See Fig. 81.
Fuel Injector 5 Connector (4.8L, 5.3L & 6.0L)	On left side of intake manifold. See Fig. 37.
Fuel Injector 5 (6.6L)	On right side of engine. See Fig. 80.
Fuel Injector 6 Connector (4.8L, 5.3L & 6.0L)	On right side of intake manifold. See Fig. 38.
Fuel Injector 6 (6.6L)	On left side of engine. See Fig. 81.
Fuel Injector 7 Connector (4.8L, 5.3L & 6.0L)	On left side of intake manifold. See Fig. 37.
Fuel Injector 7 (6.6L)	On right side of engine. See Fig. 80.
Fuel Injector 8 Connector (4.8L, 5.3L & 6.0L)	On right side of intake manifold. See Fig. 38.
Fuel Injector 8 (6.6L)	On left side of engine. See Fig. 81.
Fuel Pressure Regulator (6.6L)	Top right front of engine. See Fig. 94.
Fuel Pressure Regulator (6.6L Turbo)	Mounted to injection pump, near the thermostat housing. See Fig. 82.
Idle Air Control (IAC) Valve Connector (4.3L)	At idle air control (IAC) valve. See Fig. 33.
Idle Air Control (IAC) Valve (4.8L, 5.3L & 6.0L)	On left side of throttle body. See Fig. 69.
Ignition Lock Cylinder Control Actuator	At top left of steering column. See Fig. 13.
Intake Air (AI) Flow Valve	Top front of engine. See Fig. 92.
Pressure Control (PC) Solenoid Valve Assembly (4L80-E/4L85-E)	Internal to transmission. See Fig. 50.
Pressure Control (PC) Solenoid Valve (4L60-E/4L65-E/4L70-E)	Internal to transmission. See Fig. 46.
Starter Solenoid	On lower right side of engine. See Fig. 80.
TCC PWM Solenoid Valve	On automatic transmission control valve body. See Fig. 49.
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve Assembly (4L80-E/4L85-E)	Internal to transmission. See Fig. 50.
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve (4L60-E/4L65-E/4L70-E)	Internal to transmission. See Fig. 46.
Torque Converter Clutch (TCC) Solenoid Valve	Internal to transmission. See Fig. 46.
Turbocharger Vane Position Control Solenoid Valve	At right side of turbocharger. See Fig. 82.
1-2 Shift Solenoid (SS) Valve Assembly (4L80-E/4L85-E)	Internal to transmission. See Fig. 50.
1-2 Shift Solenoid (SS) Valve (4L60-E/4L65-E/4L70-E)	Internal to transmission. See Fig. 46.
2-3 Shift Solenoid (SS) Valve Assembly (4L80-E/4L85-E)	Internal to transmission. See Fig. 50.
2-3 Shift Solenoid (SS) Valve (4L60-E/4L65-E/4L70-E)	Internal to transmission. See Fig. 46.
3-2 Shift Solenoid (SS) Valve Assembly	Internal to transmission. See Fig. 46.

Chevrolet Chevy Express H1500 2007 - SWITCHES

Chevrolet Chevy Express H1500 2007 SWITCHES LOCATION

Component	Location
A/C High Pressure Switch Connector (4.3L)	On rear portion of A/C compressor. See Fig. 20.
A/C High Pressure Switch Connector (4.8L, 5.3L & 6.0L)	On rear portion of A/C compressor. See Fig. 21.
A/C High Pressure Switch (6.6L)	On rear of A/C compressor. See Fig. 98.
A/C Low Pressure Switch	On side of accumulator. See Fig. 22.
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L60-E/4L65-E/4L70-E)	Internal to transmission. See Fig. 46.
Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch (4L80-E/4L85-E)	Internal to transmission. See Fig. 50.
Brake Fluid Level Switch Connector	On brake master cylinder reservoir. See Fig. 26.
Brake Fluid Level Switch Connector (Heavy Duty)	At left rear of engine compartment. See Fig. 41.
Brake Pressure Differential Switch Connector (Light Duty)	On brake valve, near front of EBCM. See Fig. 11.
Coolant Level Switch	Bottom of surge tank. See Fig. 97.
Door Ajar Switch Connector - LR	At base of left "B" pillar. See Fig. 15.
Door Ajar Switch - RR (Passenger/Cargo)	At right "B" pillar. See Fig. 31.
Door Jam Switch - LR Side	At left "B" pillar. See Fig. 63.
Door Jam Switch - RR Side (Hinged)	At right "B" pillar. See Fig. 64.
Door Jam Switch - RR Side (Sliding)	At right "B" pillar. See Fig. 65.
Door Latch Assembly - Cargo	In right rear cargo door. See Fig. 111.
Door Latch Assembly - Driver	At rear of driver door. See Fig. 61.
Door Latch Assembly - Passenger	At rear of front passenger door. See Fig. 62.
Engine Oil Level Switch	On left side of oil pan. See Fig. 81.
Engine Oil Level Switch Connector (4.8L, 5.3L & 6.0L)	On right side of oil pan. See Fig. 21.
Horn Switch	In steering wheel. See Fig. 103.
Ignition Key Alarm Switch	Inside top of steering column. See Fig. 13.
Park Brake Switch Connector	Under left side of dash. See Fig. 28.
Park/Neutral Position (PNP) Switch (4.3L & 5.3L)	On left side of transmission. See Fig. 35.
PNP Switch (4L60-E/4L65-E/4L70-E)	On left side of transmission. See Fig. 47.
Power Brake (PB) Booster Fluid Pressure Alarm Switch Connector	Near power brake booster, in booster inlet hose. See Fig. 27.
Seat Belt Switch - LF	In left front seat belt latch. See Fig. 51.
Stop Lamp Switch Connector	Behind left side of dash, above brake pedal. See Fig. 60.

Chevrolet Chevy Express H1500 2007 - MISCELLANEOUS

Chevrolet Chevy Express H1500 2007 MISCELLANEOUS LOCATION

Component	Location
Antenna	At right rear of engine compartment. See Fig. 56.
Auxiliary Power Outlet Connector	Behind right side of dash. See Fig. 24.
Battery	At right front of engine compartment. See Fig. 4.
Battery Cable (+)	At battery. See Fig. 4.
Battery Cable (-)	At battery. See Fig. 4.
Battery - Secondary	On left frame rail. See Fig. 84.
Blower Motor Resistor Assembly	At right rear of engine compartment, on evaporator case. See Fig. 22.
Blower Motor Resistor Assembly Connector - Auxiliary	On auxiliary heater motor. See Fig. 102.
Coolant Heater - Fuel Pump (6.6L)	Attached to the left inner frame rail, near the fuel pump assembly. See Fig. 84.
Coolant Heater (6.6L)	Attached to the left front inner frame rail. See Fig. 84.
Data Link Connector (DLC)	Under left side of dash. See Fig. 60.
Door Contact Plate - Left Side	At left "B" pillar. See Fig. 63.
Door Contact Plate - Right Side (Hinged)	At right "B" pillar. See Fig. 64.
Door Contact Plate - Right Side (Sliding)	At right "B" pillar. See Fig. 65.
Generator - Auxiliary	Top left front of engine. See Fig. 98.
Generator (4.3L)	At top right front of engine. See Fig. 19.
Generator (4.8L, 5.3L & 6.0L)	At top left front of engine. See Fig. 69.
Generator (6.6L)	Top right front of engine. See Fig. 98.
Glow Plug (Coolant Heater)	On coolant heater assembly. See Fig. 99.
Glow Plug 1	On right side of engine. See Fig. 80.
Glow Plug 2	On left side of engine. See Fig. 81.
Glow Plug 3	On right side of engine. See Fig. 80.
Glow Plug 4	On left side of engine. See Fig. 81.
Glow Plug 5	On right side of engine. See Fig. 80.
Glow Plug 6	On left side of engine. See Fig. 81.
Glow Plug 7	On right side of engine. See Fig. 80.
Glow Plug 8	On left side of engine. See Fig. 81.
Horn Assembly	At left front of engine compartment. See Fig. 66.
Horn Assembly Connector	At left rear of engine compartment. See Fig. 34.
Horn Assembly (School Bus)	At left front of engine compartment. See Fig. 66.
Ignition Coil Connector	On top right side of engine. See Fig. 32.
Inflatable Restraint Steering Wheel Module	In steering wheel. See Fig. 103.
Inflatable Restraint Steering Wheel Module Coil	At top of steering column. See Fig. 52.
Navigation Antenna Connector	At center front of roof. See Fig. 54.
Outside Rearview Mirror Connector - Driver	In driver door. See Fig. 57.
Outside Rearview Mirror Connector - Passenger	In right front passenger door. See Fig. 58.
Remote Control Door Lock Receiver (RCDLR) Connector	Behind center of dash. See Fig. 23.
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. 31.

Chevrolet Chevy Express H1500 2007 - CONNECTORS

Chevrolet Chevy Express H1500 2007 CONNECTORS LOCATION

Component	Location
C100 (Diesel W/Active Brake Control) (Black, 30 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 86.
C100 (Gas W/O Active Brake Control) (Black, 16 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 34.
C101 (Diesel W/Active Brake Control) Black, 30 Pin)	At left rear of engine compartment, near underhood fuse block. See Fig. 86.
C101 (Gas W/O Active Brake Control) (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. 37.
C104 (Heavy Duty) (Black, 2 Pin)	Near left side of radiator support. See Fig. 73.
C104 (Light Duty) (Yellow, 2 Pin)	Near left side of radiator support. See Fig. 73.
C105 (Black, 10 Pin)	Right front inner frame rail. See Fig. 86.
C107 (6.6L) (Black, 40 Pin)	Left front of engine compartment. See Fig. 82.
C107 (6.6L Turbo) (Black, 38 Pin)	Left front of engine compartment. See Fig. 82.
C108 (6.6L) (Gray, 40 Pin)	Right front of engine. See Fig. 92.
C108 (6.6L Turbo) (Black, 24 Pin)	Front right side of engine. See Fig. 82.
C109 (Gray, 2 Pin)	At left rear of engine compartment. See Fig. 26.
C110 (Black, 6 Pin)	Top left side of engine. See Fig. 82.
C111 (6.6L) (Black, 8 Pin)	Top left side of engine. See Fig. 93.
C111 (6.6L Turbo) (Green, 6 Pin)	Top left side of engine. See Fig. 82.
C112 (Black, 4 Pin)	Rear right side of engine. See Fig. 82.
C114 (Black, 10 Pin)	On left outer frame rail. See Fig. 85.
C115 (Black, 8 Pin)	Right side of engine. See Fig. 105.
C126 (Gray, 7 Pin)	On top of left valve cover. See Fig. 37.
C127 (Gray, 7 Pin)	On top of right valve cover. See Fig. 38.
C128 (Black, 8 Pin)	Rear oxygen sensor harness, near right frame rail. See Fig. 44.
C141 (Gray, 2 Pin)	At left rear of engine compartment, near firewall. See Fig. 27.
C174 (Black, 30 Pin)	On left frame rail near fuel pump. See Fig. 85.
C175 (4L60-E/4L65-E/4L70-E) (Gray, 20 Pin)	On right side of transmission. See Fig. 71.
C175 (4L80-E/4L85-E) (Gray, 20 Pin)	On left side of transmission. See Fig. 72.
C200 (Black, 48 Pin)	At base of steering column. See Fig. 23.
C203 (RV Upfitter Option) (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. 28.
C221 (Gray, 6 Pin)	Behind left side of dash, above brake pedal. See Fig. 60.
C222 (Black, 4 Pin)	Behind left side of dash, near parking brake. See Fig. 12.
C225 (Black, 12 Pin)	Behind right kick panel. See Fig. 14.
C275 (Heavy Duty) (Yellow, 2 Pin)	At base of steering column. See Fig. 107.
C275 (Light Duty) (Yellow, 4 Pin)	At base of steering column. See Fig. 107.
C300 (Yellow, 2 Pin)	Near body fuse block. See Fig. 12.
C303 (Black, 8 Pin)	Near top of left "B" pillar. See Fig. 15.
C304 (Black, 12 Pin)	Near top of left "B" pillar. See Fig. 74.
C305 (Gray, 3 Pin)	Under vehicle, on left frame rail. See Fig. 104.
C306 (Heavy Duty) (Black, 2 Pin)	Below right front seat. See Fig. 31.
C306 (Light Duty) (Black, 12 Pin)	Below right front seat. See Fig. 31.
C307 (Heavy Duty) (Black, 4 Pin)	Below left front seat. See Fig. 51.
C307 (Light Duty) (Black, 6 Pin)	Below left front seat. See Fig. 51.
C311 (Black, 40 Pin)	Behind left kick panel. See Fig. 12.
C312 (Black, 18 Pin)	Behind right kick panel. See Fig. 14.
C314 (Black, 10 Pin)	Under vehicle, on left frame rail. See Fig. 104.
C316 (Black, 6 Pin)	In front of fuel pump on frame rail. See Fig. 85.
C318 (Gray, 40 Pin)	Behind left kick panel. See Fig. 12.
C319 (Black, 8 Pin)	Behind left kick panel. See Fig. 76.
C320 (Black, 16 Pin)	Near base of left "C" pillar. See Fig. 77.
C321 (Black, 4 Pin)	Near center of left "C" pillar. See Fig. 77.
C400 (Black, 8 Pin)	Near center of right "D" pillar. See Fig. 16.
C401 (Black, 6 Pin)	Center of left "D" pillar. See Fig. 16.
C402 (Black, 6 Pin)	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. 18.
C406 (Black, 2 Pin)	Under vehicle, on left frame rail. See Fig. 18.
C407 (Auxiliary Heater Provisions) (Gray, 6 Pin)	Near auxiliary HVAC assembly. See Fig. 15.
C407 (Auxiliary Heater & Rear A/C) (Gray, 6 Pin)	On rear auxiliary HVAC. See Fig. 70.
C409 (Auxiliary Heater & Rear A/C) (Black, 2 Pin)	Near auxiliary HVAC assembly. See Fig. 70.
C409 (135 Wheel Base - Auxiliary Heater/Rear A/C) (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. 75.
C414 (Black, 2 Pin)	At right rear frame rail. See Fig. 75.
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. See Fig. 109.
C419 (Black, 2 Pin)	At rear of vehicle, on center of rear roof rail. See Fig. 16.
C420 (Black, 12 Pin)	Near top of right "B" pillar. See Fig. 74.
C901 (Gray, 2 Pin)	In left rear cargo door. See Fig. 110.
C902 (Gray, 2 Pin)	In right rear cargo door. See Fig. 111.

Chevrolet Chevy Express H1500 2007 - GROUNDS

Chevrolet Chevy Express H1500 2007 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)	On left rear of engine. See Fig. 9.
G102 (4.8L, 5.3L & 6.0L)	On left rear of engine. See Fig. 10.
G102 (6.6L)	Left front lower side of the engine block. See Fig. 86.
G103 (4.3L)	On right rear of engine. See Fig. 9.
G103 (4.8L, 5.3L & 6.0L)	On right rear of engine. See Fig. 10.
G103 (6.6L)	Left front lower side of the engine block. See Fig. 86.
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.
G107	Left front lower side of the engine block. See Fig. 86.
G108	Right front lower side of the engine block. See Fig. 86.
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.
G305	Left center outer frame rail, near the secondary battery. See Fig. 84.
G347	On bottom of left "B" pillar. See Fig. 15.
G400	On inner left rear frame rail. See Fig. 18.
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. 17.

Chevrolet Chevy Express H1500 2007 - SPLICES

Chevrolet Chevy Express H1500 2007 SPLICES LOCATION

Component	Location
SP200	In dash wiring harness, 10 cm from underhood pass-through grommet breakout. See Fig. 12.
SP250	In dash harness, approximately 20 cm (7.86 in) from underhood pass through grommet. See Fig. 12.
SP347	In body harness, attached to lower left "B" pillar. See Fig. 15.
S101 (4.3L)	In engine harness, 43 cm from underhood lamp breakout. See Fig. 33.
S101 (4.8L, 5.3L & 6.0L)	In engine harness, 4 cm from knock sensor breakout. See Fig. 37.
S101 (6.6L)	In the engine chassis harness, approximately 10 cm (3.93 in) from the ECM breakout. See Fig. 86.
S102 (4.3L)	In engine harness, 6 cm from generator connector breakout. See Fig. 32.
S102 (4.8L, 5.3L & 6.0L)	In engine harness, 8 cm from knock sensor breakout. See Fig. 37.
S102 (6.6L)	In the engine chassis harness, approximately 5 cm (1.96 in) from the MAF sensor breakout. See Fig. 86.
S103	In the engine chassis harness, approximately 10 cm (3.93 in) from the underhood lamp breakout. See Fig. 86.
S107	In engine harness, between C110 & C111.
S108	In engine harness, between CKP sensor connector & CMP connector.
S110	In forward lamp harness, 12 cm from left headlight connector breakout. See Fig. 7.
S111	In engine harness, between #1 & #4 fuel injectors & C107.
S112	In engine harness, between #2 & #5 fuel injectors & C108.
S113	In engine harness, between #6 & #7 fuel injectors & C107.
S114	In engine harness, between #3 & #8 fuel injectors & C108.
S118	In forward lamp harness, 13 cm from right headlight 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.
S206	In dash harness, approximately 30 cm (11.81 in) from radio breakout. See Fig. 106.
S231	In dash harness, 23 cm from C200.
S245	In dash harness, 13 cm from radio & HVAC control assembly breakout. See Fig. 23.
S246	In dash harness, 6 cm from radio & HVAC control assembly breakout. See Fig. 24.
S247	In dash harness, 36 cm from C200 breakout.
S248	In dash harness, 8 cm from C200 breakout. See Fig. 23.
S249	In dash harness, 5 cm from inflatable restraint I/P module connector breakout. See Fig. 24.
S250	In dash harness, 5 cm from air temperature actuator connector breakout. See Fig. 24.
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. 17.
S301 (Cutaway)	In chassis harness, 87 cm from EBCM connector breakout. See Fig. 108.
S301 (Passenger/Cargo)	In chassis harness, 44 cm from EBCM connector breakout. See Fig. 11.
S302	In PRP/UF2 harness, 15 cm from rear fuse block. See Fig. 17.
S303	In PRP/UF2 harness, 8 cm from rear fuse block. See Fig. 17.
S304	In driver seat harness, 10 cm from driver seat adjuster switch connector breakout. See Fig. 51.
S305 (Rear Auxiliary Controls W/RV Upfitter Option)	In upfitter HVAC control harness, 39 cm from C303 breakout. See Fig. 25.
S305 (W/O RV Upfitter Option)	In front headliner harness, 31 cm from C304 breakout.
S306 (Rear Auxiliary Controls W/RV Upfitter Option)	In upfitter HVAC control harness, 19 cm from C303 breakout. See Fig. 25.
S306 (W/O RV Upfitter Option)	In front headliner harness, 42 cm from C304 breakout.
S307 (Rear Auxiliary Controls W/RV Upfitter Option)	In upfitter HVAC control harness, 88 cm from C303 breakout. See Fig. 25.
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. 17.
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	In body harness, 11 cm form C307. See Fig. 76.
S314	In vanity mirror lamp harness, 34 cm from front courtesy & reading lamp connector breakout. See Fig. 74.
S315	In chassis harness, 10 cm from G300 breakout. See Fig. 11.
S316	In transmission harness, approximately 20 cm (7.87 in) from C174. See Fig. 85.
S317	In front passenger seat harness, approximately 10 cm (3.93 in) from C306.
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	In front headliner harness, 5 cm from front courtesy/reading light breakout. See Fig. 74.
S348	In PRP/UF2 harness, 19 cm from left front dome fluorescent work lamp connector. See Fig. 17.
S350	In PRP/UF2 harness, 12 cm from left front dome fluorescent work lamp connector. See Fig. 17.
S354 (Rear Auxiliary Controls W/RV Upfitter Option)	In upfitter HVAC control harness, 64 cm from C303 breakout. See Fig. 25.
S354 (W/O RV Upfitter Option)	In front headliner harness, 11 cm from C304 breakout.
S355 (Rear Auxiliary Controls W/RV Upfitter Option)	In upfitter HVAC control harness, 11 cm from auxiliary HVAC control processor connector breakout. See Fig. 25.
S355 (W/O RV Upfitter Option)	In front headliner harness, 21 cm from C304 breakout.
S401	In body harness, 16 cm from C419 breakout. See Fig. 16.
S402 (Cutaway)	In chassis harness, 24 cm from G400 breakout. See Fig. 18.
S402 (Passenger/Cargo)	In chassis harness, 16 cm from G400 breakout.
S403	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. 70.
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. 17.
S409	In PRP/UF2 harness, 88 cm from right dome fluorescent work lamp connector breakout. See Fig. 17.
S411	In rear HVAC harness, 6 cm from auxiliary blower motor connector breakout. See Fig. 70.
S412	In rear HVAC harness, 20 cm from auxiliary blower motor connector breakout. See Fig. 70.
S413	In rear HVAC harness, 24 cm from auxiliary blower motor breakout. See Fig. 102.
S450	In body harness, 10 cm from C419 breakout. See Fig. 16.
S451	In body harness, 10 cm from C415 breakout. See Fig. 16.
S452	In body harness, 46 cm from C417 breakout.
S453	In body harness, 52 cm from C417 breakout.
S500	In left front door harness, 6 cm from left front door speaker breakout. See Fig. 57.
S502	In left front door harness, 16 cm from driver's outside rearview mirror connector. See Fig. 57.
S600	In right front door harness, 7 cm from right front door speaker breakout. See Fig. 58.
S902	In right rear door harness, 19 cm from license lamp connector breakout. See Fig. 59.
S903	In rear fog lamp harness, approximately 22 cm (8.66 in) from C406 breakout. See Fig. 18.
S904	In rear fog lamp harness, approximately 12 cm (4.72 in) from C406 breakout. See Fig. 18.