Harness Routing Views. GMC Truck Sonoma Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2001 🢒 Sonoma Pickup - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

Forward Lamps Harness


(1)	G108
(2)	G101
(3)	Forward Lamps Harness
(4)	Splice Pack SP101
(5)	G100 (California Emissions Only)
(6)	G112 and G113 (Envoy)
(7)	G111 and G109 (Envoy)
(8)	Forward Lamps Harness
(9)	Radiator Support, LH
(10)	Splice Pack SP100
(11)	G110

Figure 2:

Battery Fuse and Secondary Air Injection (AIR) Jumper Harness


(1)	Radiator Support, RH
(2)	Secondary Air Injector (AIR) Jumper Harness
(3)	Battery Fuse
(4)	Fuse Holder
(5)	G100
(6)	G112
(7)	S153
(8)	Battery Positive Cable

Figure 3:

Secondary Air Injection(AIR) Fuse Block


(1)	C117
(2)	Splice S105
(3)	Secondary Air Injection (AIR) Fuse Block
(4)	Secondary Air Injection (AIR) Jumper Harness

Figure 4:

Engine Compartment Details


(1)	Radiator Support, LH
(2)	Fender, RF
(3)	C117 (2.2 L Engine)
(4)	C101
(5)	G111

Figure 5:

Inline Connector C106


(1)	Fender, LF
(2)	C106
(3)	Horn - Left
(4)	Repeater Lamp - Left (Export Only)
(5)	Fuse Block - Underhood Connector C4 (GRN)

Figure 6:

Front Frame Grounds


(1)	Wheel Speed Sensor (WSS) - LF
(2)	Inflatable Restraint Front End Discriminating Sensor - Left
(3)	Inflatable Restraint Front End Discriminating Sensor - Right
(4)	G106
(5)	G118
(6)	Wheel Speed Sensor (WSS) - RF

Figure 7:

A/C Accumulator (4.3L)


(1)	A/C Low Pressure Switch
(2)	A/C Accumulator
(3)	High Side Service Port
(4)	C100
(5)	Low Side Service Port

Figure 8:

Powertrain Control Module (PCM)


(1)	Powertrain Control Module (PCM)
(2)	C102
(3)	C101
(4)	Body Harness
(5)	Secondary Air Injection Pump Harness
(6)	S121
(7)	S113
(8)	C117
(9)	Powertrain Control Module (PCM), Connector C1
(10)	Powertrain Control Module (PCM), Connector C2
(11)	Engine Harness

Figure 9:

Engine, LF (2.2L)


(1)	Idle Air Control (IAC) Valve
(2)	Throttle Position (TP) Sensor
(3)	Exhaust Gas Recirculation (EGR) Valve
(4)	Fuse Block - Underhood Connector C2
(5)	Engine Coolant Temperature (ECT) Sensor
(6)	A/C Compressor Clutch Diode, S103 and S104
(7)	Manifold Absolute Pressure (MAP) Sensor

Figure 10:

4.3L Engine Generator and Starter


(1)	Exhaust Gas Recirculation Valve
(2)	Generator
(3)	Crankshaft Position (CKP) Sensor
(4)	Starter
(5)	Starter Solenoid
(6)	Splice S100
(7)	Splice S101
(8)	Splice S102
(9)	Ignition Control Module (ICM)
(10)	Ignition Coil
(11)	Ignition Coil Assembly
(12)	G107

Figure 11:

Engine, LR (2.2L)


(1)	Generator
(2)	G102 and G103
(3)	Engine Oil Pressure Sensor
(4)	Evaporative Emissions (EVAP) Canister Purge Solenoid Valve Connector
(5)	Ignition Control Module (ICM) Connector C1 (w/o Coil)
(6)	Ignition Control Module (ICM) Connector C2 (w/o Coil)
(7)	G105
(8)	S152
(9)	C111
(10)	S106
(11)	S129
(12)	S128

Figure 12:

Engine, LR (4.3L)


(1)	A/C Compressor Clutch Diode, S103, and S104
(2)	Throttle Position (TP) Sensor
(3)	Idle Air Control (IAC) Valve
(4)	S102
(5)	Distributor
(6)	S116
(7)	G102 and G103
(8)	S152
(9)	Knock Sensor (KS)
(10)	G105 and G104
(11)	Engine Coolant Temperature (ECT) Sensor
(12)	Fuse Block - Underhood Connector C2 (BLK)
(13)	A/C Compressor High Pressure Switch
(14)	A/C Compressor

Figure 13:

Heated Oxygen Sensor (HO2S) Extension Harness (4.3 L)


(1)	C100
(2)	S151
(3)	S150
(4)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1 Connector
(5)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 3 Connector

Figure 14:

Manual Transmission, LH (4.3L)


(1)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1 Connector
(2)	C104
(3)	S140
(4)	Vehicle Speed Sensor (VSS) (2WD)
(5)	Backup Lamp Switch
(6)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1

Figure 15:

Automatic Transmission (2.2L)


(1)	Vehicle Speed Sensor (VSS)
(2)	C175
(3)	S140
(4)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 2 Connector

Figure 16:

Transmission Range Switch (w/ A/T) 4.3L Shown, 2.2L Similar


(1)	C104
(2)	Park/Neutral Position (PNP) and Backup Lamp Switch Connector C2
(3)	Park/Neutral Position (PNP) and Backup Lamp Switch Connector C1
(4)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1 Connector
(5)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1

Figure 17:

Automatic Transmission, RH (4.3L)


(1)	C175
(2)	Vehicle Speed Sensor (VSS)
(3)	S140

Figure 18:

Transfer Case (NP1) Harness Routing View


(1)	Transfer Case Harness
(2)	Transfer Case Encoder Motor
(3)	Transfer Case (NP1)

Figure 19:

Transfer Case (NP4)


(1)	C116
(2)	Transfer Case Encoder Motor
(3)	Vehicle Speed Sensor (VSS) and Connector
(4)	Propshaft Speed Sensor - Rear and Connector
(5)	S134
(6)	Propshaft Speed Sensor - Front and Connector

Figure 20:

Transfer Case, RH Rear (Bravada)


(1)	Propshaft Speed Sensor - Rear and Connector
(2)	Active Transfer Case Harness
(3)	Transfer Case Encoder Motor and Connector
(4)	Transfer Case (NP4)

Figure 21:

Transfer Case (NP8) Harness Routing View


(1)	C116, C2 (M50 Only)
(2)	Active Transfer Case Harness
(3)	Vehicle Speed Sensor (VSS)
(4)	Transfer Case Encoder Motor, C2
(5)	Transfer Case Encoder Motor, C1
(6)	Propshaft Speed Sensor - Rear
(7)	Transfer Case (NP8)
(8)	Propshaft Speed Sensor - Front
(9)	S134
(10)	C116, C2 (M30 Only)

Figure 22:

Instrument Panel, LF


(1)	IP Bulkhead
(2)	C214
(3)	C211
(4)	C210
(5)	C204
(6)	Body Control Module (BCM) Connector C1
(7)	Body Control Module (BCM) Connector C2
(8)	IP Vacuum Harness Connector
(9)	Temperature Sensor - Lower (w/C68)
(10)	Splice Pack SP202
(11)	S202
(12)	Relay Block - Body
(13)	Stoplamp Switch
(14)	C500
(15)	C501 (4 Door Utility), C502 (2 Door Export)
(16)	Splice Pack SP201
(17)	C209
(18)	C229 (Envoy Only)
(19)	G200 and G202
(20)	G201
(21)	Clutch Pedal Position (CPP) Switch

Figure 23:

Instrument Panel, RH


(1)	Heater/Vent Assembly
(2)	C200
(3)	C203
(4)	Front RH Hinge Pillar
(5)	Body Control Module (BCM)
(6)	Body Control Module (BCM), Connector C1
(7)	Body Control Module (BCM), Connector C2
(8)	Body Control Module (BCM), Connector C3

Figure 24:

Instrument Panel, RF


(1)	C200
(2)	C203
(3)	Bulkhead, Right Front
(4)	Recirculation Door Motor
(5)	Turn Signal/Hazard Flasher Module
(6)	C601
(7)	Transfer Case Shift Control Module Connectors
(8)	Splice Pack SP200
(9)	Splice Pack SP204
(10)	G203, G204, G205, and G208 (Envoy)
(10)	G203,G204, G205 and G208 (Envoy)
(11)	G206 (Envoy)
(11)	G206 (Envoy)
(12)	HVAC Solenoid Assembly Connector (w/ Auto A/C)
(13)	Air Temperature Actuator Connector

Figure 25:

IP Wiring Harness


(1)	Inflatable Restraint IP Module
(2)	Inflatable Restraint IP Module Connector
(3)	I/P Compartment Lamp
(4)	Door Jamb Switch - Front Passenger

Figure 26:

Instrument Panel, LH


(1)	Headlamp Switch Connector
(2)	Fog Lamp Switch Connector
(3)	Headlamp Switch
(4)	Door Jamb Switch - Driver
(5)	Fuse Block - I/P Side of the Body Relay Block Harness
(6)	S204
(7)	C217
(8)	Courtesy Lamp - Left Console
(9)	Relay Block - Body
(10)	S223
(11)	Speaker - LF

Figure 27:

IP Wiring Harness Composite View (with Auto A/C)


(1)	Inflatable Restraint IP Module Connector
(2)	Radio Connector
(3)	Sunload Sensor
(4)	Transfer Case Shift Control Switch
(5)	HVAC Control Module
(6)	Instrument Cluster Connector
(7)	Instrument Panel (IP)
(8)	Rear Wiper/Washer Switch and Endgate/Liftgate Window Release Switch
(9)	Courtesy Lamp, LH IP
(10)	S240
(11)	Body Control Module (BCM) Connector C3
(12)	C205 (Envoy Only)
(13)	S290
(14)	C224
(15)	S275
(16)	S283
(17)	S286
(18)	S276 (Envoy Only)
(19)	S208
(20)	Splice Pack SP203
(21)	S272
(22)	S274
(23)	S273
(24)	S288
(25)	S223
(26)	Courtesy Lamp, RH IP
(27)	C200
(28)	C203
(29)	Door Jamb Switch - RF
(30)	IP Compartment Lamp
(31)	Headlamp Ambient Light Sensor
(32)	Speaker - RF

Figure 28:

IP Wiring Harness Composite View - w/o Auto A/C


(1)	S217
(2)	S215
(3)	Inflatable Restraint IP Module Switch Connector
(4)	Radio Connector
(5)	Transfer Case Shift Control Switch Connector
(6)	S275
(7)	S273
(8)	Instrument Cluster Connector
(9)	Instrument Panel (IP)
(10)	Inflatable Restraint IP Module Switch Connector (Pickup) or Rear Window Wiper/Washer and Endgate/Liftgate Window Release Switch Connector (Utility)
(11)	Courtesy Lamp - Left Console
(12)	S240
(13)	Body Control Module (BCM) Connector C3
(14)	C224
(15)	Splice Pack SP203
(16)	S205
(17)	S283
(18)	S282
(19)	S272
(20)	S274
(21)	S208
(22)	C223
(23)	Courtesy Lamp - Right Console
(24)	C200
(25)	C203
(26)	Door Jamb Switch - RF
(27)	IP Compartment Lamp Connector
(28)	Speaker - RF

Figure 29:

Steering Column Components


(1)	Shift Lever Assembly
(2)	Upper Shroud
(3)	Inflatable Restraint Steering Wheel Module Coil
(4)	C214
(5)	Multifuction Switch
(6)	G207
(7)	Park Lock Solenoid Connector
(8)	A/T Shift lock Control Solenoid
(9)	C211
(10)	Transmission Shift Lever
(11)	Passlock™ Sensor Connector
(12)	Ignition Switch and Ignition Key Alarm Switch

Figure 30:

Accessory Power Tray


(1)	S268
(2)	S269
(3)	Accessory Power Outlet Harness
(4)	C223
(5)	IP Insulator
(6)	Accessory Power Tray
(7)	Accessory/Auxiliary Power Outlet - Right
(8)	Accessory/Auxiliary Power Outlet - Left

Figure 31:

Dome Lamp Harness


(1)	S302
(2)	S332
(3)	Dome Lamp Harness
(4)	Dome and Center High Mounted Stop Lamp (CHMSL)
(5)	S300
(6)	Vanity Mirror Lamp - Left
(7)	C209
(8)	Inside Rear View Mirror
(9)	Vanity Mirror Lamp - Right

Figure 32:

Sunroof (Utility)


(1)	Driver Information Center (DIC), Connector C2
(2)	Sunroof Motor and Drive
(3)	Sunroof Module, Connector C2
(4)	Sunroof Module, Connector C1
(5)	S332
(6)	C300
(7)	Sunroof Module
(8)	S390
(9)	Driver Information Center (DIC), Connector C1
(10)	Driver Information Center (DIC)

Figure 33:

Dome Lamp Harness w/o Driver Information Center (DIC) (Utility)


(1)	Dome Lamp
(2)	S332
(3)	S300
(4)	S302
(5)	Dome Lamp Harness
(6)	C209
(7)	Vanity Mirror Lamp - Left
(8)	Inside Rear View Mirror
(9)	Vanity Mirror Lamp - Right

Figure 34:

Driver Information Center (DIC) (w/ Overhead Console)


(1)	Driver Information Center (DIC), Connector C1
(2)	Driver Information Center (DIC)
(3)	C301
(4)	S310
(5)	S302
(6)	Air Temperature Sensor Assembly - Inside (w/ Auto A/C)
(7)	S332
(8)	S390

Figure 35:

Floor Panel, Utility


(1)	S308
(2)	S306
(3)	S309
(4)	S304
(5)	S312
(6)	C317
(7)	Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(8)	Inflatable Restraint Sensing and Diagnostic Module (SDM)
(9)	C315
(10)	S307
(11)	S305

Figure 36:

Floor Shifter Harness Connections


(1)	Automatic Transmission Control Module Connector
(2)	Floor Shifter
(3)	Automatic Transmission Shift Lever Position Indicator
(4)	S335

Figure 37:

Body Wiring to Left Front Seat


(1)	C317
(2)	Seat

Figure 38:

Front Passenger Door Shown, Driver Similar


(1)	Door Lock Cylinder Switch Connector - Front Passenger
(2)	Door Handle Switch Connector - Right
(3)	Door Lock Actuator Connector - Front Passenger
(4)	Door Lock Actuator - Front Passenger
(5)	Window Motor and Connector - Front Passenger
(6)	Splice S502-LH
(7)	Splice S601-RH, S501-LH
(8)	Speaker Connector - RF Door
(9)	C601-RH, C500-LH
(10)	C501-LH
(11)	P600-RH, P500-LH
(12)	Outside Rearview Mirror Connector - Passenger

Figure 39:

Outside Rear View Mirror


(1)	P501 (LH) or P601 (RH)
(2)	Outside Rear View Mirror, LH (RH Opposite)
(3)	Outside Rear View Mirror Connector

Figure 40:

Rear Door Wiring Harness (RH Shown, LH Similar)


(1)	Door
(2)	Door Lock Actuator - RR
(3)	Window Switch - RR
(4)	Speaker - RR
(5)	Window Motor - RR
(6)	C306 (RH) or C304 (LH)
(7)	C307 (RH) or C305 (LH)
(8)	P800 (RH) or P700 (LH)
(9)	Window Switch - RR

Figure 41:

Rear Door Details - 2 & 4 Door Utility


(1)	Door Opening Frame (4-Door)
(2)	S307 (RH) or S306 (LH) (4-Door)
(3)	Door Jamb Switch - RR
(4)	Body Side Panel, RH (2-Door)
(5)	Speaker - RR (2-Door)
(6)	S305 (RH) or S308 (LH) (4-Door)
(7)	C306
(8)	C307

Figure 42:

Body Wiring Views


(1)	C471
(2)	G420
(3)	Vacuum Hoses
(4)	Automatic Level Control (ALC) Air Compressor
(5)	P400
(6)	Vehicle Communications Unit Connector

Figure 43:

Body Wiring to Body Side Trim Panel


(1)	Automatic Level Control (ALC) Solenoid Valve
(2)	C471
(3)	Body Side Trim
(4)	S470
(5)	Automatic Level Control (ALC) Timer Relay
(6)	Automatic Level Control (ALC) Inflator Air Switch
(7)	Accessory Power Outlet - Rear

Figure 44:

Automatic Level Control (ALC) Harness View


(1)	Automatic Level Control (ALC) Harness
(2)	S471
(3)	S473
(4)	S474
(5)	Automatic Level Control (ALC) Sensor Connector
(6)	S472

Figure 45:

Automatic Level Control (ALC) Air Compressor


(1)	Park/Turn Signal Lamp - RR
(2)	Automatic Level Control (ALC) Air Compressor
(3)	Body Harness
(4)	Automatic Level Control (ALC) Air Compressor Connector
(5)	C472
(6)	C470
(7)	Automatic Level Control (ALC) Harness

Figure 46:

Body Opening Frame, Rear


(1)	Center High Mounted Stop Lamp (CHMSL) Resistor, S404 and S405
(2)	C403
(3)	S476 (Envoy)
(4)	G450
(5)	S427
(6)	G420
(7)	C402
(8)	S475 (Envoy)

Figure 47:

Rear Roof (Utility)


(1)	Center High Mounted Stop Lamp (CHMSL) (w/ Endgate)
(2)	Cargo Lamp (w/Endgate)
(3)	Center High Mounted Stop Lamp (CHMSL) (w/ Liftgate)
(4)	Cargo Lamp (w/ Liftgate)
(5)	Center High Mounted Stop Lamp (CHMSL) Connector
(6)	P404 (w/ Endgate)

Figure 48:

Rear Lamps Connection (Utility LH Side Shown, RH Side Similar)


(1)	C403 (LH) and C402 (RH)
(2)	S417 (LH) and S418 (RH)
(3)	S415 (LH) and S416 (RH)
(4)	S419 (LH) and S420 (RH)
(5)	P402 (LH) and P403 (RH)
(6)	Park/Turn Signal Lamps - LR (RR Similar) Upper and Lower
(7)	Backup Lamp - Left (Right Similar)

Figure 49:

Body Harness to Rear Window Defogger


(1)	C432 LH (Shown), C433 RH (Opposite)
(2)	Body Harness
(3)	Rear Window Defogger Extension Harness
(4)	Endgate
(5)	LR Quarter, Above Liftglass

Figure 50:

Rear Lamps (Pickup)


(1)	Marker Lamp - RR
(2)	Park/Turn Signal Lamp - RR
(3)	Backup Lamp - Right
(4)	Splice Pack SP400
(5)	Backup Lamp - Left
(6)	Marker Lamp - LR
(7)	Park/Turn Signal Lamp - LR

Figure 51:

Endgate Connectors


(1)	Body Floor
(2)	C411, C412 and C413
(3)	Endgate
(4)	Window Washer Tube Check Valve, Rear

Figure 52:

Rear Framerail-Pickup


(1)	Framerail, LR
(2)	C401
(3)	Framerail, RR
(4)	G422
(5)	Splice Pack SP401
(6)	G402
(7)	G475
(8)	Splice Pack SP402

Figure 53:

Chassis Harness Routing (S422)


(1)	Frame (Shown upside down)
(2)	Chassis Harness
(3)	S422

Figure 54:

Rear Frame (4-Door Utility)


(1)	Trailer Wiring Provision
(2)	Splice Pack SP423
(3)	Evaporative Emissions (EVAP) Canister Vent Solenoid
(4)	C430
(5)	Fuel Filler Neck Ground Strap
(6)	G402

Figure 55:

Liftgate LH (Utility)


(1)	C426 LH (C428 RH)
(2)	C427 LH (C429 RH)
(3)	P901
(4)	C432 LH (C433 RH)
(5)	Liftgate Switch Connector
(6)	Liftgate Lock Actuator Connector
(7)	Liftgate Window Release Actuator Connector
(8)	Liftgate Window Release Actuator

Figure 56:

Liftgate Wiper Washer, RH


(1)	Liftgate
(2)	Window Wiper Motor - Rear Connector
(3)	Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch Connector
(4)	Door Lock Actuator - Liftgate Connector
(5)	Window Washer Nozzle Hose - Rear
(6)	Door Lock Actuator - Liftgate Connector
(7)	Rear Window Wiper Cutout and Liftglass Ajar Jamb Switch Connector
(8)	Bracket
(9)	Liftgate Harness

Figure 57:

LH Front Fender Area


(1)	Electronic Brake Control Module (EBCM) (310) Connector C1
(2)	Electronic Brake Control Module (EBCM) (310) Connector C3
(3)	Connector C109 (Body Harness to 4WAL Harness)
(4)	Connector C106 (Utility Body Harness to Forward Lamps Harness)
(5)	Windshield Washer Fluid Pump - Rear (Utility)
(6)	Ground G110
(7)	Windshield Washer Fluid Pump - Front
(8)	Fuse Block - Underhood Connector C1
(9)	Connector C114 (Body Harness to Front Axle Indicator Switch, w/ Electric Shift 4WD)
(10)	Brake Pressure Differential Switch
(11)	Connector C108 (Body Harness to 4WD Extension Harness)

Figure 58:

License Lamp Wiring (Sportside Pickup)


(1)	License Plate - Center
(2)	C430

Figure 59:

License Lamps (Export)


(1)	Connector C430
(2)	License Lamp Mounting Bracket
(3)	License Lamp - Right
(4)	License Lamp - Center
(5)	License Lamp - Left
(6)	S425
(7)	S426
(8)	License Lamp Wiring Harness