Harness Routing Views. GMC Truck Envoy

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 Envoy - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Harness Routing Views

Figure 1:

Forward Lamp Harness, Fuse Block-Underhood


(1)	C105
(2)	Forward Lamp Harness
(3)	G101
(4)	Brake Fluid Level Connector
(5)	G105
(6)	G102

Figure 2:

Forward Lamp Harness, Fuse Block-Underhood


(1)	G101
(2)	Forward Lamp Harness
(3)	Fuse Block-Underhood, C4

Figure 3:

Forward Lamp Harness, Front


(1)	Ambient Air Temperature Sensor Connector
(2)	Forward Lamp Harness
(3)	Engine Fan Connector, C118

Figure 4:

Forward Lamp Harness, Right Side


(1)	G103
(2)	A/C Low Pressure Switch
(3)	Winshield Washer Fluid Pump Connectors
(4)	Windshield Washer Fluid Level Switch
(5)	Forward Lamp Harness

Figure 5:

Engine Harness, Fuse Block-Underhood


(1)	C105, I/P to Forward Lamp Harness, Fuse Block-Underhood
(2)	C4, Forward Lamp Harness, Fuse Block-Underhood
(3)	C3, Chassis Harness, Fuse Block-Underhood
(4)	C2, Instrument Panel Harness, Fuse Block-Underhood
(5)	C101, I/P to Chassis Harness
(6)	C1, Engine Harness, Fuse Block-Underhood

Figure 6:

Engine Harness, Fuse Block-Underhood (Six Cylinder Engine, 4.2L)


(1)	PCM
(2)	C100, Engine Harness to I/P Harness
(3)	C1, Fuse Block-Underhood
(4)	PCM Connectors
(5)	Engine Harness

Figure 7:

Instrument Harness, Engine Compartment (Six Cylinder Engine, 4.2L)


(1)	C104, Engine to Fuel Injector Harness
(2)	C100, I/P to Engine Harness
(3)	C105, I/P to Forward Lamp Harness
(4)	Fuse Block Underhood, C2
(5)	C101, Instrument to Chassis Harness
(6)	PCM Connector, C1

Figure 8:

Engine Harness Routing - 4.2L (1 of 2)


(1)	Ignition Coil 1
(2)	Ignition Coil 2
(3)	Ignition Coil 3
(4)	Intake Air Temperature (IAT) Sensor
(5)	Ignition Coil 4
(6)	Ignition Coil 5
(7)	C104
(8)	Ignition Coil 6
(9)	Starter
(10)	C175
(11)	Heated Oxygen Sensor (HO2S) Sensor 2
(12)	Vehicle Speed Sensor (VSS)
(13)	Park/Neutral Position (PNP) Switch
(14)	Evaporative Emission (EVAP) Canister Purge Solenoid
(15)	G107
(16)	Manifold Absolute Pressure (MAP) Sensor
(17)	Throttle Body
(18)	Engine Oil Pressure (EOP) Switch
(19)	Camshaft Position (CMP) Sensor
(20)	Camshaft Actuator Solenoid Assembly
(21)	Heated Oxygen Sensor (HO2S) Sensor 1

Figure 9:

Engine Harness Routing - 4.2L (2 of 2)


(1)	Engine Coolant Temperature (ECT) Sensor
(2)	Powertrain Control Module (PCM) Connector C2, C3
(3)	C100
(4)	Crankshaft Position Sensor (CKP) Sensor
(5)	Knock Sensor (KS) 2
(6)	G101
(7)	Fuse Block - Underhood, Connector C1
(8)	Battery Positive
(9)	G109
(10)	G108
(11)	A/C Refrigerant Pressure Sensor
(12)	A/C Compressor Clutch Assembly
(13)	Battery Negative
(14)	Knock Sensor (KS) 1
(15)	Generator

Figure 10:

Engine Harness Routing - 5.3L (1 of 2)


(1)	Fuel Injector 4
(2)	C108
(3)	Evaporative Emission (EVAP) Canister Purge Solenoid
(4)	S102
(5)	Fuel Injector 3
(6)	Engine Coolant Temperature (ECT) Sensor
(7)	Throttle Actuator Control (TAC) Module C1
(8)	C107
(9)	Fuse Block Underhood C1
(10)	G107
(11)	S101
(12)	G108
(13)	G109
(14)	Powertrain Control Module (PCM) Connector C1, C2
(15)	Ignition Coil 5
(16)	Crankshaft Position (CKP) Sensor
(17)	Starter
(18)	A/C Compressor Clutch Assembly
(19)	Fuel Injector 6
(20)	A/C Refrigerant Pressure Sensor
(21)	Fuel Injector 2
(22)	Throttle Body
(23)	Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor

Figure 11:

Engine Harness Routing - 5.3L (2 of 2)


(1)	Generator
(2)	Fuel Injector 8
(3)	Manifold Absolute Pressure (MAP) Sensor
(4)	C115
(5)	Fuel Injector 5
(6)	Fuel Injector 7
(7)	Ignition Coil 7
(8)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 2
(9)	C310
(10)	Heated Oxygen Sensor (HO2S) Bank 1, Sensor 1
(11)	C175
(12)	C109
(13)	Ignition Coil 1
(14)	Fuel Injector 1
(15)	Engine Oil Pressure (EOP) Sensor
(16)	Heated Oxygen Sensor (HO2S) Bank 2, Sensor 1

Figure 12:

Engine Harness, Automatic Transmission


(1)	Engine Harness
(2)	Engine Harness

Figure 13:

Engine Harness, Transfer Case


(1)	Transfer Case Motor Encoder Connector
(2)	C310, Engine to Chassis Harness
(3)	Engine Harness
(4)	Chassis Harness

Figure 14:

Chassis Harness Routing


(1)	Fuse Block Underhood Eyelet (Trailer Wiring)
(2)	Fuse Block Underhood, Connector C3
(3)	Fuse Block Underhood, Connector C7
(4)	C101
(5)	Brake Fluid Level Switch
(6)	C310
(7)	Propshaft Speed Sensor - Rear
(8)	Vehicle Speed Sensor
(9)	Fuel Pump and Sender Assembly
(10)	Air Suspension - RR
(11)	Backup Lamp - Right
(12)	Evaporative Emission (EVAP) Canister Vent Solenoid
(13)	Fuel Tank Pressure (FTP) Sensor
(14)	Air Suspension Compressor Assembly
(15)	Trailer Connector
(16)	Backup Lamp - Left
(17)	S408
(18)	G403
(19)	Air Suspension Sensor - LR
(20)	S306
(21)	S359
(22)	G305
(23)	Electronic Brake Control Module, Connector C1 and C2
(24)	Transfer Case Encoder Motor
(25)	Propshaft Speed Sensor - Front
(26)	G304
(27)	Wheel Speed Sensor - LF
(28)	Electronic Frontal Sensor - Left
(29)	Electronic Frontal Sensor - Right
(30)	Front Axle Actuator
(31)	Wheel Speed Sensor - RF

Figure 15:

Connector C201


(1)	Multi-function Switch
(2)	C201

Figure 16:

Front Passenger and Driver Seats


(1)	C312
(2)	C313
(3)	C311
(4)	C315
(5)	C316
(6)	C314

Figure 17:

Underhood Fuse Block


(1)	G104
(2)	G105
(3)	C105, Instrument to Forward Lamp Harness
(4)	C101, Instrument to Chassis Harness
(5)	G102
(6)	Windshield Wiper Connector

Figure 18:

Instrument Harness, Left I/P


(1)	Headlamp Switch Connectors
(2)	Splice Pack SP205
(3)	Grommet
(4)	Instrument Panel Harness

Figure 19:

Instrument Harness, Instrument Panel


(1)	Connector C203
(2)	Accessory Power Connector
(3)	Cigar Lighter Connector
(4)	Rear Window Wiper/Washer Connector
(5)	Headlamp Switch

Figure 20:

Instrument Harness, Console


(1)	C307, I/P to Console Harness

Figure 21:

Instrument Panel, Right Side


(1)	Instrument Panel
(2)	Body Harness
(3)	C203, Body Harness
(4)	C203, I/P Harness

Figure 22:

Instrument Harness, Floor


(1)	SP201, Ground Splice Pack
(2)	Instrument Panel Harness
(3)	C307, I/P to Console Harness
(4)	Sensing and Diagnostic Module Connector
(5)	C304, I/P to Body Harness
(6)	C301, I/P to Body Harness

Figure 23:

Instrument Harness, Rear Floor


(1)	Body Control Module (BCM) Connectors
(2)	Fuse Block-Rear, I/P Connector, C1
(3)	Fuse Block-Rear, Body Connector, C2
(4)	Fuse Block-Rear, Headliner Connector, C3
(5)	I/P Harness
(6)	VCIM Connectors
(7)	Splice Pack SP306

Figure 24:

Floor Console (Long Wheelbase, Body Type VIN 6)


(1)	Front Floor Panel
(2)	Front Floor Console
(3)	Body Harness
(4)	C309

Figure 25:

Body Wiring Harness Extension Harness


(1)	Body Control Module (BCM)
(2)	Body Wiring Harness Extension Harness
(3)	Fuse Block-Rear

Figure 26:

Body Harness, Rear Floor


(1)	Fuse Block-Rear, Body Connector, C2
(2)	C304, Body to Instrument Harness (Short Wheelbase, Body Type VIN 3)
(3)	C306 Body to Headliner Harness (Short Wheelbase, Body Type VIN 3)
(4)	C301, Body to Instrument Harness (Short Wheelbase, Body Type VIN 3)
(5)	Vehicle Communication Interface Module (VCIM) Connectors

Figure 27:

Body Harness, Rear Floor (Long Wheelbase, Body Type VIN 6)


(1)	C301
(2)	C304
(3)	Body Harness
(4)	Rear Floor
(5)	Instrument Panel Harness

Figure 28:

Body Harness, Left Rear Floor (Long Wheelbase, Body Type VIN 6)


(1)	Fuse Block-Rear
(2)	Body Harness
(3)	Headliner Harness
(4)	C306

Figure 29:

Body Harness, C401 (Long Wheelbase, Body Type VIN 6)


(1)	Mode Actuator-Auxiliary
(2)	Blower-Auxiliary
(3)	Air Temperature Actuator-Auxiliary
(4)	C401
(5)	In-Line 30A Fuse

Figure 30:

Headliner Harness, Overhead Console


(1)	Overhead Console
(2)	C305

Figure 31:

Headliner Harness, Left B-Pillar


(1)	Headliner Harness
(2)	Door Frame
(3)	G302

Figure 32:

Headliner Harness, Left Rear Floor


(1)	C306, Headliner Harness to Body Harness
(2)	Fuse Block-Rear, Headliner Connector, C3
(3)	Body Harness
(4)	Headliner Harness

Figure 33:

Sunroof Harness With Headliner Removed


(1)	C308
(2)	Sunroof Motor Connector
(3)	Connector C1
(4)	Sunroof Module
(5)	Connector C2

Figure 34:

Front Doors, C500 and C600


(1)	Door, LF
(2)	Body Wiring Harness
(3)	C500, C600 similar on right side

Figure 35:

Rear Doors, C700 and C800


(1)	Door, LR
(2)	C700, C800 similar on right side
(3)	Body Wiring Harness

Figure 36:

G401, G402


(1)	Body Side Lower Reinforcement
(2)	Body Harness
(3)	G401; G402 Similar on Opposite Side

Figure 37:

Tailgate Connector


(1)	Liftgate
(2)	C900
(3)	Body Opening