Chevrolet Silverado 1500 2007 - 2007 GENERAL MOTORS Sierra & Silverado

Chevrolet Silverado 1500 2007 - BUZZERS, RELAYS & TIMERS

Chevrolet Silverado 1500 2007 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C CMPRSR Relay	In underhood fuse block. See Fig. 64.
Auxiliary Battery Relay	Right rear side of engine compartment.
ENG EXH VLV Relay	In underhood fuse block. See Fig. 64.
FAN CNTRL Relay	In underhood fuse block. See Fig. 64.
FAN HI Relay	In underhood fuse block. See Fig. 64.
FAN LO Relay	In underhood fuse block. See Fig. 64.
FAN RLY Relay	In underhood fuse block. See Fig. 64.
FOG LAMP Relay	In underhood fuse block. See Fig. 64.
FUEL PMP Relay	In underhood fuse block. See Fig. 64.
HDLP LO/HID Relay	In underhood fuse block. See Fig. 64.
Integrated Trailer Brake Controller Solid State Relay	On rear of left frame rail. See Fig. 46.
PRK LAMP Relay	In underhood fuse block. See Fig. 64.
PWR/TRN Relay	In underhood fuse block. See Fig. 64.
REAR DEFOG Relay	In underhood fuse block. See Fig. 64.
Roof Beacon Relay	On left "B" pillar.
RUN/CRNK Relay	In underhood fuse block. See Fig. 64.
STRTR Relay	In underhood fuse block. See Fig. 64.
Wrecker Relay	Right rear corner of engine compartment.

Chevrolet Silverado 1500 2007 - CIRCUIT PROTECTION DEVICES

Chevrolet Silverado 1500 2007 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse Block (I/P)	Left side of dash. See Fig. 18.
Fuse Block (Mobile Radio)	Behind right side of dash.
Fuse Holder (Underhood) (6.6L)	Right side of firewall. See Fig. 61.
Junction Block (Auxiliary)	At left side of engine compartment.
Junction Block (Left I/P)	Lower left side of dash. See Fig. 18.
Junction Block (Rear Lamps)	Inside of left rear frame rail. See Fig. 19.
Junction Block (Right I/P)	In right end of dash. See Fig. 51.
Underhood Fuse Block	Left side of engine compartment. See Fig. 2.

Chevrolet Silverado 1500 2007 - CONTROL UNITS

Chevrolet Silverado 1500 2007 CONTROL UNITS LOCATION

Component	Location
Blower Motor Control Module (CJ2)	Lower right side of HVAC module. See Fig. 33.
Blower Motor Control Module (C67)	Lower right side of HVAC module. See Fig. 34.
Body Control Module (BCM)	Lower left side of dash. See Fig. 18.
Chime Module	Center of dash.
Electronic Brake Control Module (EBCM)	On left side of frame assembly. See Fig. 5.
Engine Control Module (ECM)	Left front of engine compartment, near fan shroud. See Fig. 2.
Fuel System Control Module (FSCM)	Under rear of vehicle. See Fig. 26.
Glow Plug Control Module (GPCM) (6.6L)	Top left rear of engine. See Fig. 60.
Heated Steering Wheel Control Module	On left side of steering wheel assembly.
Ignition Control Module (ICM) (4.3L)	Right front of intake manifold.
Inflatable Restraint Front Passenger Presence System (PPS) Module	Under front passenger seat. See Fig. 40.
Inflatable Restraint Sensing & Diagnostic Module (SDM)	Under driver's seat. See Fig. 4.
Infrared Module	In headliner.
Intake Air Heater (IAH) Module (6.6L)	Left front of engine. See Fig. 60.
Integrated Trailer Brake Controller (ITBC) Module	On rear of left frame rail. See Fig. 46.
Memory Seat Module	Under front of driver's seat. See Fig. 39.
Rear Object Sensor Control Module	At rear cargo area, behind trim panel. See Fig. 4.
Theft Deterrent Control Module	On right side of steering column. See Fig. 3.
Throttle Actuator Control (TAC) Module (6.6L)	Top right front of engine. See Fig. 62.
Transfer Case Shift Control Module	Lower left side of dash. See Fig. 18.
Transmission Control Module (Allison)	Left front of engine compartment, near fan shroud. See Fig. 11.
Transmission Control Module (Except Allison)	Left front of engine compartment, near fan shroud. See Fig. 2.
Vehicle Communication Interface Module (VCIM)	Upper right side of dash.

Chevrolet Silverado 1500 2007 - MOTORS

Chevrolet Silverado 1500 2007 MOTORS LOCATION

Component	Location
Air Temperature Actuator (C67)	Top middle of HVAC module. See Fig. 34.
Air Temperature Actuator (Left) (CJ2)	Bottom left of HVAC module. See Fig. 33.
Air Temperature Actuator (Right) (CJ2)	Top middle of HVAC module. See Fig. 33.
Blower Motor (CJ2)	Lower right side of HVAC module. See Fig. 33.
Blower Motor (C67)	Lower right side of HVAC module. See Fig. 34.
Cooling Fan (Left)	Left front of engine compartment. See Fig. 28.
Cooling Fan (Right	Right front of engine compartment. See Fig. 28.
Electronic Adjustable Pedal Assembly	Under left side of dash. See Fig. 1.
Front Axle Actuator	On front axle assembly. See Fig. 48.
Fuel Pump & Sender Assembly (Primary)	Inside fuel tank. See Fig. 5.
Fuel Pump & Sender Assembly (Short Wheel Base)	Inside fuel tank. See Fig. 27.
Lumbar Adjuster Assembly (Driver)	In driver's seat back. See Fig. 39.
Lumbar Adjuster Assembly (Passenger)	In passenger's seat back. See Fig. 40.
Mode Actuator (CJ2)	Left end of HVAC module. See Fig. 33.
Mode Actuator (C67)	Left end of HVAC module. See Fig. 34.
Recirculation Actuator (CJ2)	Top right side of HVAC module. See Fig. 33.
Recirculation Actuator (C67)	Top right side of HVAC module. See Fig. 34.
Seat Adjuster Assembly (Driver)	On driver's seat track. See Fig. 39.
Seat Adjuster Assembly (Passenger)	On passenger's seat track. See Fig. 40.
Seat Recline Motor (Driver)	Lower right side of driver seat back. See Fig. 39.
Seat Recline Motor (Passenger)	Lower right side of passenger's seat back. See Fig. 40.
Sliding Rear Window Motor	Right rear of passenger compartment. See Fig. 31.
Starter (4.8L, 5.3L, 6.0L & 6.2L)	Lower right rear side of engine. See Fig. 20.
Starter (6.6L)	Lower right rear side of engine. See Fig. 62.
Sunroof Module	In front of sunroof, above headliner.
Transfer Case Encoder Motor (NQH)	On transfer case. See Fig. 49.
Window Motor (Driver)	Inside driver's door. See Fig. 13.
Window Motor (Left Rear) (Crew Cab)	In left rear door. See Fig. 15.
Window Motor (Left Rear) (Extended Cab)	In left rear door. See Fig. 29.
Window Motor (Passenger)	Inside passenger's door. See Fig. 14.
Window Motor (Right Rear) (Crew Cab)	In right rear door. See Fig. 16.
Window Motor (Right Rear) (Extended Cab)	In right rear door. See Fig. 30.
Windshield Washer Fluid Pump	Bottom of washer fluid reservoir. See Fig. 50.
Windshield Wiper Motor	Under windshield cowl, between wiper arms. See Fig. 2.

Chevrolet Silverado 1500 2007 - SENDING UNITS & SENSORS

Chevrolet Silverado 1500 2007 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Position (APP) Sensor	Above accelerator pedal. See Fig. 1.
A/C Low Pressure Sensor (4.8L, 5.3L, 6.0L & 6.2L)	On A/C accumulator. See Fig. 24.
A/C Refrigerant Pressure Sensor (6.6L)	Near compressor, on A/C high pressure hose. See Fig. 60.
Air Temperature Sensor (Lower Left) (CJ2)	Left side of HVAC module. See Fig. 33.
Air Temperature Sensor (Lower Right) (CJ2)	Lower left of HVAC module. See Fig. 33.
Ambient Air Temperature Sensor (ISRVM)	On radiator support. See Fig. 37.
Ambient Light/Sunload Sensor Assembly (CJ2)	On top center of dash.
Brake Booster Vacuum Sensor	Left rear of engine compartment. See Fig. 2.
Camshaft Position (CMP) Sensor (4.3L)	Front of engine, above crank pulley. See Fig. 69.
Camshaft Position (CMP) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	Front of engine, above crank pulley. See Fig. 23.
Camshaft Position (CMP) Sensor (6.6L)	Front of engine, above crank pulley. See Fig. 60.
Crankshaft Position (CKP) Sensor (4.3L)	Front of engine, right of crank pulley. See Fig. 68.
Crankshaft Position (CKP) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	Lower right side of engine. See Fig. 25.
Crankshaft Position (CKP) Sensor (6.6L)	Front of engine, right of crank pulley. See Fig. 62.
Engine Coolant Temperature (ECT) Sensor (4.3L)	Left side of engine, above manifold. See Fig. 70.
Engine Coolant Temperature (ECT) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	On top of engine. See Fig. 23.
Engine Coolant Temperature (ECT) Sensor 1 (6.6L)	Top front center of engine. See Fig. 60.
Engine Coolant Temperature (ECT) Sensor 2 (6.6L)	Top front center of engine. See Fig. 60.
Engine Oil Pressure (EOP) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	Top rear of engine. See Fig. 20.
Engine Oil Pressure (EOP) Sensor (6.6L)	Side of block. See Fig. 21.
Fuel Line Pressure Sensor (E85)	Under left side of vehicle. See Fig. 5.
Fuel Pump & Sender Assembly (Primary)	Inside fuel tank. See Fig. 5.
Fuel Rail Temperature (FRT) Sensor (6.6L)	Top left rear of engine. See Fig. 60.
Fuel Tank Pressure (FTP) Sensor (E85)	On fuel pump & sender assembly. See Fig. 5.
Fuel Tank Pressure Sensor (Short Wheel Base)	On fuel pump & sender assembly. See Fig. 27.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1	Near left side of engine.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2	Near left side of engine.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1	Near right side of engine.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2	Near right side of engine.
Inflatable Restraint Front End Sensor (Left)	On lower left radiator support. See Fig. 44.
Inflatable Restraint Front End Sensor (Right)	On lower right radiator support. See Fig. 44.
Inflatable Restraint Front Passenger Presence System (PPS) Sensor	In front passenger's seat bottom. See Fig. 40.
Inflatable Restraint Seat Position Sensor (SPS) (Left)	Right front corner of driver's seat track. See Fig. 39.
Inflatable Restraint Side Impact Sensor (SIS) (Left Front)	In driver's door. See Fig. 13.
Inflatable Restraint Side Impact Sensor (SIS) (Left Rear) (Crew Cab)	In left rear door. See Fig. 15.
Inflatable Restraint Side Impact Sensor (SIS) (Left Rear) (Extended Cab)	In left rear door. See Fig. 29.
Inflatable Restraint Side Impact Sensor (SIS) (Right Front)	In passenger's door. See Fig. 14.
Inflatable Restraint Side Impact Sensor (SIS) (Right Rear) (Crew Cab)	In right rear door. See Fig. 16.
Inflatable Restraint Side Impact Sensor (SIS) (Right Rear) (Extended Cab)	In right rear door. See Fig. 30.
Inflatable Restraint Vehicle Rollover Sensor (ASF)	Below center console. See Fig. 4.
Input Speed Sensor (ISS) Assembly	In transmission. See Fig. 8.
Inside Air Temperature Sensor (Front) (CJ2)	Left side of headliner. See Fig. 12.
Intake Air Temperature (IAT) Sensor 2 (6.6L)	On top center of engine. See Fig. 60.
Knock Sensor (KS) (4.3L)	At rear of engine. See Fig. 71.
Knock Sensor (KS) 1 (4.8L, 5.3L, 6.0L & 6.2L)	Lower left side of engine. See Fig. 23.
Knock Sensor (KS) 2 (4.8L, 5.3L, 6.0L & 6.2L)	Lower right side of engine. See Fig. 20.
Manifold Absolute Pressure (MAP) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	On top of intake manifold. See Fig. 20.
Manifold Absolute Pressure (MAP) Sensor (6.6L)	On top of intake manifold. See Fig. 60.
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor (4.8L, 5.3L, 6.0L & 6.2L)	Right front of engine compartment. See Fig. 24.
Mass Air Flow (MAF) Sensor (6.6L)	Front of engine. See Fig. 62.
Object Sensor (Left Rear Corner)	Left corner of rear bumper. See Fig. 38.
Object Sensor (Left Rear Middle)	Left side of rear bumper. See Fig. 38.
Object Sensor (Right Rear Corner)	Right corner of rear bumper. See Fig. 38.
Object Sensor (Right Rear Middle)	Right side of rear bumper. See Fig. 38.
Oil Level Sensor (4.8L, 5.3L, 6.0L & 6.2L)	Lower right side of engine. See Fig. 25.
Outside Moisture Sensor	Near inside rearview mirror.
Rotational Position Sensor (NQH)	On transfer case. See Fig. 49.
Steering Angle Sensor	On steering column. See Fig. 3.
Turbocharger Vane Position Sensor (6.6L)	On left side of engine. See Fig. 63.
Vehicle Speed Sensor (VSS)	On transfer case tailshaft housing. See Fig. 47.
Vehicle Speed Sensor (VSS)	On transmission tailshaft housing. See Fig. 8.
Vehicle Speed Sensor (VSS) (NQH)	On transfer case tailshaft housing. See Fig. 49.
VSS Sensor	On transfer case tailshaft housing. See Fig. 10.
Water In Fuel Sensor (6.6L)	Right side of engine. See Fig. 62.
Wheel Speed Sensor (WSS) (Left Front)	On left front steering knuckle. See Fig. 6.
Wheel Speed Sensor (WSS) (Left Rear)	On left rear brake backing plate. See Fig. 7.
Wheel Speed Sensor (WSS) (Right Front)	On right front steering knuckle. See Fig. 6.
Wheel Speed Sensor (WSS) (Right Rear)	On right rear brake backing plate. See Fig. 7.
YAW Rate & Lateral Acceleration Sensor	Under center console trim panel. See Fig. 4.

Chevrolet Silverado 1500 2007 - SOLENOIDS & SOLENOID VALVES

Chevrolet Silverado 1500 2007 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C Compressor Clutch (4.8L, 5.3L, 6.0L & 6.2L)	On front of A/C compressor. See Fig. 24.
A/C Compressor Clutch (6.6L)	On front of A/C compressor. See Fig. 60.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve (4.8L, 5.3L, 6.0L & 6.2L)	On intake manifold. See Fig. 23.
Evaporative Emissions (EVAP) Canister Vent Solenoid Valve (E85)	Under rear of vehicle. See Fig. 5.
Evaporative Emissions (EVAP) Canister Vent Solenoid Valve (Short Wheel Base)	Under rear of vehicle. See Fig. 27.
Exhaust Gas Recirculation (EGR) Valve (6.6L)	On top right side of engine. See Fig. 62.
Fuel Injector 1 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Fuel Injector 1 (6.6L)	Near right engine rocker cover. See Fig. 62.
Fuel Injector 2 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 22.
Fuel Injector 2 (6.6L)	Near left engine rocker cover. See Fig. 63.
Fuel Injector 3 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Fuel Injector 3 (6.6L)	Near right engine rocker cover. See Fig. 62.
Fuel Injector 4 (6.6L)	Near left engine rocker cover. See Fig. 63.
Fuel Injector 5 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Fuel Injector 5 (6.6L)	Near right engine rocker cover. See Fig. 62.
Fuel Injector 6 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 22.
Fuel Injector 6 (6.6L)	Near left engine rocker cover. See Fig. 63.
Fuel Injector 7 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Fuel Injector 7 (6.6L)	Near right engine rocker cover. See Fig. 62.
Fuel Injector 8 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 22.
Fuel Injector 8 (6.6L)	Near left engine rocker cover. See Fig. 63.
Shift Interlock Solenoid	On steering column. See Fig. 3.
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve	In transmission. See Fig. 8.
Torque Converter Clutch (TCC) Solenoid Valve	In transmission. See Fig. 8.
Turbocharger Vane Position Control Solenoid Valve (6.6L)	Top rear of engine. See Fig. 60.
1-2 Shift Solenoid (SS) Valve	In transmission. See Fig. 8.
2-3 Shift Solenoid (SS) Valve	In transmission. See Fig. 8.
3-2 Shift Solenoid (SS) Valve Assembly	In transmission. See Fig. 8.

Chevrolet Silverado 1500 2007 - SWITCHES

Chevrolet Silverado 1500 2007 SWITCHES LOCATION

Component	Location
A/C Low Pressure Switch (6.6L)	On right side of A/C accumulator. See Fig. 59.
A/C Refrigerant Pressure Switch (4.8L, 5.3L, 6.0L & 6.2L)	Near compressor, on A/C high pressure hose. See Fig. 24.
Brake Fluid Level Switch	On master cylinder. See Fig. 2.
Engine Coolant Level Switch (6.6L)	On bottom of surge tank. See Fig. 59.
Engine Oil Level Switch (6.6L)	On left side of engine oil pan.
Hood Ajar Switch	Part of hood latch assembly. See Fig. 37.
Ignition Switch	In upper steering column. See Fig. 3.
Oil Level Switch (4.8L, 5.3L, 6.0L & 6.2L)	On right side of engine oil pan. See Fig. 20.
Park Brake Switch	On park brake pedal assembly. See Fig. 36.
Park/Neutral Position (PNP) Switch	On left rear side of transmission. See Fig. 9.
Stop Lamp Switch	Top of brake pedal assembly. See Fig. 1.
Transfer Case Shift Control Switch	On top left of transfer case. See Fig. 47.
Turn Signal Multifunction Switch	On left side of steering column. See Fig. 3.
Washer Fluid Level Switch	Bottom of washer fluid reservoir. See Fig. 50.

Chevrolet Silverado 1500 2007 - MISCELLANEOUS

Chevrolet Silverado 1500 2007 MISCELLANEOUS LOCATION

Component	Location
Audio Amplifier	Under rear of center console.
Cellular Telephone Microphone	In overhead console. See Fig. 12.
Data Link Connector (DLC)	Lower left side of dash. See Fig. 17.
Door Latch Assembly (Driver)	Rear of driver's door. See Fig. 13.
Door Latch Assembly (Left Rear) (Crew Cab)	Rear of left rear door. See Fig. 15.
Door Latch Assembly (Passenger)	Rear of passenger's door. See Fig. 14.
Door Latch Assembly (Right Rear) (Crew Cab)	Rear of right rear door. See Fig. 16.
Fuel Heater (6.6L)	Right side of engine, near fuel filter. See Fig. 60.
Generator (Left) (6.6L)	Upper left front of engine. See Fig. 60.
Generator (Right) (6.6L)	Upper right front of engine. See Fig. 60.
Generator (4.8L, 5.3L, 6.0L & 6.2L)	Upper left front of engine. See Fig. 23.
GMLAN Terminator	At left side of rear chassis crossmember. See Fig. 19.
Heated Seat Element (Driver Back)	In driver's seat back. See Fig. 42.
Heated Seat Element (Driver Cushion)	In driver's seat cushion. See Fig. 42.
Heated Seat Element (Passenger Back)	In passenger's seat back. See Fig. 43.
Heated Seat Element (Passenger Cushion)	In passenger's seat cushion. See Fig. 43.
Horn (Left)	Lower left front of vehicle. See Fig. 35.
Horn (Right)	Lower right front of vehicle. See Fig. 35.
Ignition Coil 1 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Ignition Coil 2 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 20.
Ignition Coil 3 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Ignition Coil 4 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 20.
Ignition Coil 5 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Ignition Coil 6 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 20.
Ignition Coil 7 (4.8L, 5.3L, 6.0L & 6.2L)	Upper left side of engine. See Fig. 22.
Ignition Coil 8 (4.8L, 5.3L, 6.0L & 6.2L)	Upper right side of engine. See Fig. 20.
Inflatable Restraint I/P Module	On top right side of dash.
Inflatable Restraint Roof Rail Module (Left)	Behind left side of headliner trim. See Fig. 32.
Inflatable Restraint Roof Rail Module (Left)	Behind left side of headliner trim. See Fig. 45.
Inflatable Restraint Roof Rail Module (Right)	Behind right side of headliner trim. See Fig. 32.
Inflatable Restraint Roof Rail Module (Right)	Behind right side of headliner trim. See Fig. 45.
Inflatable Restraint Steering Wheel Module Coil	Behind steering wheel. See Fig. 3.
Information Center Telltale Assembly	Top right rear of passenger compartment. See Fig. 31.
Noise Compensation Microphone	On left side of center console.
Remote Control Door Lock Receiver (RCDLR)	Top rear of passenger compartment. See Fig. 41.
Trailer Connector	At rear of vehicle. See Fig. 19.
Valve Lifter Oil Manifold (VLOM) Assembly (4.8L, 5.3L, 6.0L & 6.2L)	Below intake manifold. See Fig. 20.
Windshield Washer Solvent Heater	Left rear corner of engine compartment. See Fig. 2.

Chevrolet Silverado 1500 2007 - CONNECTORS

Chevrolet Silverado 1500 2007 CONNECTORS LOCATION

Component	Location
X100 (Black, 8 Pin)	Left front corner of engine compartment. See Fig. 65.
X103 (Black, 16 Pin)	Left side of engine compartment. See Fig. 65.
X106 (Black, 8 Pin)	Right front corner of engine compartment. See Fig. 65.
X109 (6.6L) (Black, 24 Pin)	Below underhood fuse block. See Fig. 61.
X110 (Black, 4 Pin)	Engine harness to front axle harness, between first & second body mount. See Fig. 48.
X111 (4.8L, 5.3L, 6.0L & 6.2L) (Light Grey, 7 Pin)	Above left engine rocker cover.
X113 (4.3L, 5.3L, 6.0L & 6.2L) (Light Grey, 7 Pin)	Above right engine rocker cover. See Fig. 72.
X115 (Natural, 24 Pin)	Chassis harness to I/P harness, left side of chassis. See Fig. 83.
X120 (20 Pin)	Battery positive harness to brake/clutch harness. See Fig. 73.
X123 (6.6L) (Black, 12 Pin)	Below under hood fuse block. See Fig. 61.
X200 (Yellow, 4 Pin)	I/P harness to body harness, behind left kick panel. See Fig. 75.
X202 (Black, 30 Pin)	I/P harness to body harness, behind left kick panel. See Fig. 75.
X203 (Black, 8 Pin)	In I/P harness to headliner harness, near left "A" pillar. See Fig. 74.
X204 (Black, 12 Pin)	Headliner harness to I/P harness, near left "A" pillar. See Fig. 74.
X205 (Black, 16 Pin)	I/P harness to brake/clutch harness, near right "A" pillar. See Fig. 75.
X206 (Black, 8 Pin)	Right "A" pillar harness to I/P harness, near right "A" pillar. See Fig. 74.
X211 (Black, 40 Pin)	I/P harness to console harness, near audio amplifier. See Fig. 74.
X220 (Black, 8 Pin)	Brake/clutch harness to chassis harness.
X275 (Yellow, 4 Pin)	Lower left side of dash, near steering column. See Fig. 77.
X300 (4.3L) (Black, 8 Pin)	Left side of frame, in front of EBCM. See Fig. 67.
X303 (Black, 30 Pin)	Body harness to driver seat harness, under driver's seat. See Fig. 77.
X304 (Black, 16 Pin)	Headliner harness to overhead console harness, front center of roof. See Fig. 82.
X305 (AN3) (Black, 30 Pin)	Under driver's seat. See Fig. 77.
X305 (Except AN3) (Black, 8 Pin)	Under passenger's seat. See Fig. 77.
X309 (Black, 8 Pin)	Body harness to console harness, in front of audio amplifier. See Fig. 80.
X318 (Black, 3 Pin)	Headliner harness to CHMSL harness. See Fig. 82.
X319 (Black, 2 Pin)	Body harness to console harness. See Fig. 76.
X320 (Black, 4 Pin)	Body harness to sliding rear window jumper harness. See Fig. 79.
X321 (Black, 3 Pin)	Body harness to headliner harness. See Fig. 78.
X322 (Black, 4 Pin)	Body harness to UPA jumper harness. See Fig. 79.
X408 (Black, 8 Pin)	Body harness to rear object detection harness, right rear corner of vehicle. See Fig. 83.
X500 (Black, 10 Pin)	Body harness to left front door harness, behind left kick panel. See Fig. 77.
X501 (Black, 10 Pin)	Body harness to left front door harness, behind left kick panel. See Fig. 77.
X502 (Black, 2 Pin)	Left front door harness to body harness, behind left kick panel. See Fig. 81.
X600 (Black, 10 Pin)	Passenger door harness to body harness, behind right kick panel. See Fig. 77.
X601 (Black, 2 Pin)	Passenger door harness to body harness, behind right kick panel. See Fig. 77.
X700 (Crew Cab) (Black, 16 Pin)	Body harness to left rear door, in left "B" pillar. See Fig. 81.
X700 (Extended Cab) (Black, 12 Pin)	Left rear door to body harness, in left "B" pillar. See Fig. 78.
X800 (Crew Cab) (Black, 16 Pin)	Body harness to right rear door, in right "B" pillar. See Fig. 81.
X800 (Extended Cab) (Black, 12 Pin)	Right rear door to body harness, in right "B" pillar.Fig. 79.

Chevrolet Silverado 1500 2007 - GROUNDS

Chevrolet Silverado 1500 2007 GROUNDS LOCATION

Component	Location
G100	On lower left radiator support. See Fig. 52.
G101	On lower right radiator support. See Fig. 52.
G102	On lower left front of engine. See Fig. 53.
G102 (6.6L)	On lower left front of engine. See Fig. 63.
G103	On front of right cylinder head. See Fig. 54.
G104	Front of left cylinder head. See Fig. 55.
G106 (6.6L)	Lower left side of engine. See Fig. 63.
G107	Top left rear of engine. See Fig. 55.
G108	On left side of firewall. See Fig. 55.
G110	Left side of firewall. See Fig. 55.
G111	On left side of firewall. See Fig. 55.
G200	On right front corner of HVAC module. See Fig. 33.
G201	Upper left corner of dash. See Fig. 56.
G300	Below driver's door, on body mount. See Fig. 57.
G301	Below left side of passenger's seat. See Fig. 58.
G302	Below right side of passenger's seat. See Fig. 58.
G303	On lower left "B" pillar. See Fig. 58.
G304	On lower right "B" pillar. See Fig. 58.
G307	At right rear corner of passenger compartment. See Fig. 81.
G401	On left rear body mount. See Fig. 83.

Chevrolet Silverado 1500 2007 - SPLICES

Chevrolet Silverado 1500 2007 SPLICES LOCATION

Component	Location
J100	In forward lamp harness. See Fig. 65.
J101	In forward lamp harness. See Fig. 65.
J105 (4.3L)	In engine harness, 12 cm (4.72 in) from ECT sensor breakout. See Fig. 66.
J105 (4.8L, 5.3L, 6.0L & 6.2L	In engine harness, 12 cm (4.72 in) from ECT sensor breakout.
J106 (4.3L)	In engine harness, 23 cm (9.02 in) from MAP sensor breakout. See Fig. 66.
J106 (4.8L, 5.3L, 6.0L & 6.2L)	In engine harness, 23 cm (9.02 in) from MAP sensor breakout. See Fig. 72.
J113	In I/P harness, in C103 breakout 7 cm (2.76 in) from main harness assembly. See Fig. 73.
J128 (4.3L)	In engine harness. See Fig. 66.
J130 (4.3L)	In engine harness. See Fig. 66.
J200	In I/P harness, 14 cm (5.51 in) from left I/P junction block breakout. See Fig. 75.
J201	In I/P harness, in headlamp & dimmer switch breakout. See Fig. 75.
J203	In I/P harness, 13 cm (5.12 in) from radio connector (or DIC) breakout. See Fig. 75.
J206	In I/P harness, 14 cm (5.51 in) from C207 breakout. See Fig. 75.
J207	In I/P harness, 9 cm (3.54 in) from main harness assembly breakout. See Fig. 75.
J221	In I/P harness. See Fig. 74.
J300	In chassis harness, 15 cm (5.91 in ) from G300 breakout. See Fig. 83.
J301	In body harness. See Fig. 81.
J302	In body harness, 22 cm (8.66 in) from G301 breakout. See Fig. 79.
J303	In body harness, 30 cm (11.8 in) from G301 breakout below center console. See Fig. 77.
J304	In body harness, 14 cm (5.51 in) from passenger seat in-line connector breakout. See Fig. 77.
J327	In headliner harness, 15 cm from front inside air temperature sensor breakout. See Fig. 82.
J328	In headliner harness, 5 cm from front inside air temperature sensor breakout. See Fig. 82.
J331	In chassis harness. See Fig. 83.
J335	In auxiliary window harness. See Fig. 84.
J336	In auxiliary window harness. See Fig. 84.
J338 (4.3L)	In chassis harness. See Fig. 83.
J339	Splice pack in body harness. See Fig. 77.
J403	License lamp harness, 28 cm from left rear object sensors. See Fig. 85.
J404	License lamp harness, 20 cm from right rear object sensors. See Fig. 85.
J420	In camper harness. See Fig. 83.