Contents Wiring diagrams Section: Body Electrical All sections

Wiring Systems - Introduction: Overview Chevrolet Silverado 3500

Body Electrical 94 illustrations ~253 words

Power and Grounding Schematic Icons

Power and Grounding Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs

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Scheme 1: Power Distribution Schematics

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Scheme 39: Ground Distribution Schematics

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Scheme 60: Upfitter Provision Schematics

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Scheme 63

Scheme 64

Scheme 64: Harness Routing Views
CalloutComponent Name
1Radiator Core Support
2Headlamp - High Beam - Right
3Repeater Lamp - RF (Export)
4A/C High Pressure Recirculation Switch
5Ambient Air Temperature Sensor - Mirror
6Headlamp - High Beam - Left
7C125
8Headlamp - Low Beam - Left
9C104
10Repeater Lamp - LF (Export)
11Junction Block - Underhood C4
12C103
13Park/Turn Signal Lamp - LF
14Marker Lamp - LF
15S100
16Windshield Washer Fluid Pump
17Washer Fluid Level Sensor
18Fog Lamp - LF
19G100
20Daytime Running Lamp (DRL) - Left
21Inflatable Restraint Front End Sensor - Left
22Inflatable Restraint Front End Sensor - Right
23Fog Lamp - RF
24Ambient Air Temperature Sensor - HVAC (CJ2)
25Daytime Running Lamp (DRL) - Right
26S101
27Park/Turn Signal Lamp - RF
28Marker Lamp - RF
29Headlamp - Low Beam - Right
30C127

Scheme 65

Scheme 65
CalloutComponent Name
1Brake/Clutch Harness
2C119
3I/P Harness
4Engine Harness
5Fuse Block - Underhood
6Negative Battery Cable Harness
7C117
8Accessory Jumper Harness
9C160

Scheme 66

Scheme 66
CalloutComponent Name
1Brake/Clutch Harness
2Fuse Block - Underhood
3Emergency Vehicle Roof Lamp Relay
4C160
5C119
6C161
7Chassis Harness

Scheme 67

Scheme 67
CalloutComponent Name
13-Phase Cable
2Power Steering Pump Harness
3Auxiliary Battery Cable Jumpstart Lead
4Dash Panel
5Auxiliary Battery Cable Terminal to Fuse Block - Underhood
6Battery Cable Terminal to Fuse Block - Underhood
7Positive Battery Cable
8Negative Battery Terminal
9Power Steering Pump Connector C2
10G100
11G105
12Starter/Generator Rotor
13Starter/Generator Stator
14Battery Cable Harness
15C121
16C122
17Starter/Generator Control Module

Scheme 68

Scheme 68
CalloutComponent Name
1C102
2Fuse Block - Underhood Support Mount
3C152
4C100

Scheme 69

Scheme 69
CalloutComponent Name
1Fuse Block - Underhood
2C153 - Engine Harness to Transfer Case Harness
3C150 - Transfer Case Harness to Axle Jumper Harness
4Transfer Case Harness
5C151 - I/P Harness to Automatic Transfer Case Harness (w/NP8/NR4) or C104 - I/P Harness to Forward Lamp Harness (w/o NP8/NR4)
6C154 - I/P Harness to Automatic Transfer Case Harness (w/NP8/NR4) or C114 - Chassis Harness to I/P Harness (w/JL4/NYS)
7Power Take-Off (PTO) Relay

Scheme 70

Scheme 70
CalloutComponent Name
1Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
2Generator Connector
3Coolant Level Switch Connector
4Manifold Absolute Pressure (MAP) Sensor Connector
5A/C Low Pressure Switch Connector
6Auxiliary Battery Relay Connector (TP2)
7S102
8S103
9Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector
10Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector
11Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector
12Vehicle Speed Sensor (VSS)
13Backup Lamp Switch (Manual Trans)
14Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector
15Camshaft Position (CMP) Sensor Connector
16Engine Oil Pressure (EOP) Sensor Connector
17Engine Coolant Temperature (ECT) Sensor Connector
18Idle Air Control (IAC) Motor Connector
19S110
20Throttle Position (TP) Sensor Connector
21C153
22C100
23Fuse Block - Underhood C2
24C152
25Powertrain Control Module (PCM) C2
26Powertrain Control Module (PCM) C1
27A/C Compressor Clutch Connector
28A/C Refrigerant Pressure Sensor Connector

Scheme 71

Scheme 71
CalloutComponent Name
1Engine - 6.6L Diesel
2Engine Harness
3G102
4Auxiliary Negative Battery Ground
5Starter Relay Terminal
6Starter Solenoid

Scheme 72

Scheme 72
CalloutComponent Name
1Generator Connector
2Evaporative Emission (EVAP) Canister Purge Solenoid
3S104
4C148
5Manifold Absolute Pressure (MAP) Sensor Connector
6Knock Sensor (KS) Connector
7Knock Sensor (KS) Connector
8G104
9Camshaft Position (CMP) Sensor Connector
10Throttle Actuator Control (TAC) Connector
11C153
12G102
13C100
14Fuse Block - Underhood C2
15C152
16Powertrain Control Module (PCM) C2
17Powertrain Control Module (PCM) C1
18S110
19S103

Scheme 73

Scheme 73
CalloutComponent Name
1Manifold Absolute Pressure (MAP) Sensor Connector
2S102
3Auxiliary Battery Relay Connector (TP2)
4Evaporative Emission (EVAP) Canister Purge Soleniod
5Throttle Actuator Control (TAC) Connector
6Coolant Level Switch Connector
7Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
8A/C Refrigerant Pressure Sensor Connector
9A/C Compressor Clutch Connector
10A/C Low Pressure Switch Connector
11Engine Oil Level Switch Connector
12Camshaft Position (CMP) Sensor Connector
13Engine Oil Pressure (EOP) Sensor Connector

Scheme 74

Scheme 74
CalloutComponent Name
1Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (Automatic)
2Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (Automatic)
3Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector (Manual)
4Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Connector (Manual)
5Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (Manual)
6Vehicle Speed Sensor (VSS) Connector
7Backup Lamp Switch Connector
8Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (Manual)
9Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Connector (Automatic)
10Park/Neutral Position Switch Connector
11Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector (Automatic)

Scheme 75

Scheme 75
CalloutComponent Name
1A/C Compressor Clutch Connector
2A/C Refrigerant Pressure Sensor Connector
3Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
4Generator - Left Connector
5Coolant Level Switch
6C108
7A/C Low Pressure Switch Connector
8S118
9C107
10Throttle Actuator Control (TAC) Module Connector
11Backup Lamp Switch Connector
12Vehicle Speed Sensor (VSS) Connector
13S127
14C100
15Fuse Block - Underhood C2
16G104
17C152
18Engine Control Module (ECM) C1 Connector
19Engine Control Module (ECM) C2 Connector
20Engine Control Module (ECM) C3 Connector
21S164
22S102
23S148
24S147
25S119
26Generator - Right Connector

Scheme 76

Scheme 76
CalloutComponent Name
1S127
2Throttle Actuator Control (TAC) Module Connector
3C108
4C107
5C153
6C100
7Fuse Block - Underhood C2
8C152
9Glow Plug Controller Power
10Generator - Right Connector
11S141
12A/C Refrigerant Pressure Sensor Connector
13Engine Control Module (ECM) C3 Connector
14Engine Control Module (ECM) C2 Connector
15Engine Control Module (ECM) C1 Connector
16A/C Compressor Clutch Connector
17Generator - Left Connector
18Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor Connector
19G102
20Coolant Level Switch Connector
21A/C Low Pressure Switch Connector

Scheme 77

Scheme 77
CalloutComponent Name
1Intake Air Temperature (IAT)/ Mass Air Flow (MAF) Sensor Connector
2A/C Compressor Clutch Connector
3Coolant Level Switch Connector
4Generator - Left Connector
5A/C Refrigerant Pressure Sensor Connector
6Generator - Right Connector
7C107
8A/C Low Pressure Switch Connector
9C108
10S102
11PTO Relay
12Glow Plug Controller Power
13Throttle Actuator Control (TAC) Module Connector
14Automatic Transmission Input Shaft Speed (AT ISS) Sensor Connector
15Automatic Transmission Turbine Speed Sensor Connector
16C145
17Automatic Transmission Output Speed Sensor Connector
18Park/Neutral Position (PNP) Switch Connector
19C100
20Fuse Block - Underhood C2
21C152
22C106
23S103
24G104
25Engine Control Module (ECM) C1
26Engine Control Module (ECM) C2
27Transmission Control Module (TCM) C1
28Transmission Control Module (TCM) C2
29S163

Scheme 78

Scheme 78
CalloutComponent Name
1S163 (PTO)
2S132
3S164 (PTO)
4S102
5S151
6S103
7C155
8Fuse Block - Underhood C2
9PTO Relay Connector
10S104
11Throttle Actuator Control (TAC) Module C1
12Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
13Knock Sensor (KS) - Bank 1
14C100
15C152
16C106 (PTO)
17S165 (M74)
18S110
19G102
20Powertrain Control Module (PCM) C2
21Powertrain Control Module (PCM) C1
22Transmission Control Module (TCM) C1
23Transmission Control Module (TCM) C2

Scheme 79

Scheme 79
CalloutComponent Name
1Auxiliary Battery Relay Connector (TP2)
2A/C Low Pressure Switch Connector
3Manifold Absolute Pressure (MAP) Sensor
4Engine Coolant Temperature (ECT) Sensor
5C149
6S157
7Coolant Level Switch Connector
8S160
9Throttle Actuator Control (TAC) Motor Connector C1
10C153
11A/C Compressor Clutch Connector
12A/C Refrigerant Pressure Sensor Connector
13Knock Sensor (KS) - Bank 2
14Engine Oil Level Switch Connector
15Starter Solenoid Power
16Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Scheme 80

Scheme 80
CalloutComponent Name
1Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
2Automatic Transmission Input Shaft Speed (At ISS) Sensor
3Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
4Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
5Vehicle Speed Sensor (VSS)
6Park Neutral Position (PNP) Switch Connector
7C145
8Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Scheme 81

Scheme 81
CalloutComponent Name
1C202
2Stop Lamp Switch Connector
3C160 (5X7, 5Y0)
4C119 (9L4)
5C250
6C216
7S223
8S220
9Roof Beacon Switch Connector (5X7, 5Y0, 5G4, TRW)
10Dash Panel
11Fuse Block - Mobile Radio (9L4)
12S222
13S221
14Blunt Cut Wires (9L4)
15Relay Block - I/P C5
16Relay Block - I/P C8
17C210
18Park Brake Switch Connector
19Clutch Pedal Position (CPP) Switch

Scheme 82

Scheme 82
CalloutComponent Name
1C104 (YE9)
2C106 (PTO)
3Fuse Block Underhood - C1
4C115 (NYS)
5C105 (LB7)
6S214 (NP8)
7S202
8P110
9S213
10S205
11C222 (Except HP2)
12C209 (Z55 or E52)
13C306
14C249
15S210 (UQ7 and Y91)
16C201
17S218
18C221
19C206 (Y91 or HP2)
20S212 (NYS)
21P100
22C154 (NP1 or NP8)
23C102

Scheme 83

Scheme 83
CalloutComponent Name
1Door Latch Assembly
2Door Frame
3Fuse Block - I/P C3
4Power Window Motor Connector

Scheme 84

Scheme 84
CalloutComponent Name
1Door Frame
2Door Latch Assembly
3Power Window Motor Connector
4Junction Block - I/P C2

Scheme 85

Scheme 85
CalloutComponent Name
1C321
2Seat Adjuster Switch - Driver
3Memory Seat Module - C4
4Memory Seat Module - C3
5Seat Bolster/Lumbar Switch - Driver
6Seat Recliner Motor - Driver
7C305
8C323
9C325
10C322
11Seat Rear Vertical Motor - Driver
12Seat Front Vertical Motor - Driver
13Memory Seat Module - C2
14Memory Seat Module - C1
15Seat Horizontal Motor - Driver
16C320

Scheme 86

Scheme 86
CalloutComponent Name
1Seat Bolster Motor - Driver
2Seat Lumbar Motor - Driver
3Heated Seat Element - Driver Cushion
4C324
5Seat Belt Switch Connector
6Heated Seat Element - Driver Cushion Connector

Scheme 87

Scheme 87
CalloutComponent Name
1Seat Horizontal Motor - Front Passenger
2Seat Front Vertical Motor - Front Passenger
3Seat Rear Vertical Motor - Front Passenger
4C388
5C326
6C399
7Seat Recliner Motor - Front Passenger
8Seat Adjuster Switch - Front Passenger
9Seat Adjuster Switch Connector

Scheme 88

Scheme 88
CalloutComponent Name
1Seat Bolster Motor - Front Passenger
2Seat Lumbar Motor - Front Passenger
3Heated Seat Element - Front Passenger Cushion Connector
4C329

Scheme 89

Scheme 89
CalloutComponent Name
1Auxiliary Power Outlet - Front Connector
2S333
3S307
4S303
5Rear Seat Audio (RSA) Controller Connector
6Auxiliary Power Outlet - Console Connector
7Audio Amplifier Connector C2
8Audio Amplifier Connector C1
9Cigar Lighter
10C306
11Speaker - Subwoofer Connector
12Speaker - Subwoofer (UQ7)

Scheme 90

Scheme 90
CalloutComponent Name
1Suspension Damper Solenoid - RF (ZX3)
2Wheel Speed Sensor (WSS) - RF
3Suspension Damper Solenoid - RR (ZX3)
4License Lamp - Right
5G401
6License Lamp - Left
7Junction Block - Rear Lamps C3
8Suspension Damper Solenoid - LR (ZX3)
9Fuel Pump and Sender Assembly/Fuel Tank Pressure (FTP) Sensor Connectors
10Evaporative Emission (EVAP) Canister Vent Solenoid
11S312
12Electronic Brake Control Module (EBCM)
13Stud #1 Trailer Connector
14C198
15Fuse Block - Underhood C9
16Fuse Block - Underhood C3
17C102
18Wheel Speed Sensor (WSS) - LF
19Suspension Damper Solenoid - LF (ZX3)
20C152
21S140
22Brake Pressure Differential Switch

Scheme 91

Scheme 91
CalloutComponent Name
1S430
2Chassis
3S330
4Energy Storage Box (ESB)
5Battery Cable Harness (42V)
6P105
7C140
8Starter/Generator Control Module
9C122
10C121
11S121
12Accessory Power Receptacle Harness
13S120
14S326
15S332
16S331
17C341
18Accessory Power Receptacle Connector

Scheme 92

Scheme 92
CalloutComponent Name
1C355
2S345
3Courtesy/Reading Lamp - Rear Connector
4Headliner
5Center High Mounted Stop Lamp (CHMSL) Connector
6Driver Side B - Pillar Molding
7S321
8Relay Block - I/P Connectors - C3 and C4
9Park Brake Switch Connector
10Stop Lamp Switch Connector
11C205 (HP2)
12C214
13Inside Rearview Mirror Connector

Scheme 93

Scheme 93
CalloutComponent Name
1Fuse Block - I/P C4
2G304
3G330 (AL0)
4G399 (AG2)
5C396
6G306
7Headliner
8Rear Window Defogger Grid Connector (Crew Cab)
9Floor Panel
10G305
11C310
12C305
13Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
14C221
15C223
16Relay Block - I/P C10
17C222
18Body Control Module (BCM) C6

Scheme 94

Scheme 94
CalloutComponent Name
1Relay Block - I/P
2Relay Block - I/P - C4
3C210 - Roof Beacon Relay Inline