Harness Routing Views. GMC Truck GMC C Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views

Figure 1:

OnStar Component Locations - Typical


(1)	Global Positioning Satellite (GPS) Antenna
(2)	Cellular Telephone Microphone
(3)	Global Positioning System (GPS)
(4)	Relay Block - Body
(5)	Vehicle Communication Unit (VCU)
(6)	OnStar Button Assembly
(7)	Vehicle Interface Unit (VIU)

Figure 2:

LH Front of Vehicle - Typical


(1)	Upper Radiator Support (Tie Bar)
(2)	Headlamp Assembly-LF
(3)	Headlamp - High Beam - Left Connector
(4)	Daytime Running Lamp (DRL)-Left
(5)	Daytime Running Lamp (DRL)-Left Socket
(6)	Windshield Washer Reservoir
(7)	Park/Turn Signal Lamp Socket-LF
(8)	Marker Lamp Socket-LF
(9)	Marker Lamp-LF
(10)	Park/Turn Signal Lamp-LF
(11)	Snowplow (Option) Connector C125
(12)	Headlamp Connector-Low Beam-Left
(13)	Marker Lamp-LF

Figure 3:

Fuse Block - Underhood


(1)	Fuse Block - Underhood Bracket
(2)	Inflatible Restraint Harness
(3)	Radiator Support
(4)	C103 -I/P Harness Side
(5)	C103 -Forward Lamp Harness Side
(6)	LH Battery Tray
(7)	Fuse Block - Underhood Bracket
(8)	Fuse Block - Underhood

Figure 4:

C100, C102 and C152


(1)	C102
(2)	Fuse Block - Underhood Support Mount
(3)	C152
(4)	C100

Figure 5:

C104, C114, C150, C151, C153, C154, and PTO Relay


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

Figure 6:

Engine Harness - 4.3L


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

Figure 7:

Primary Negative Battery Ground and G105 (6.6L)


(1)	Engine - 6.6L Diesel
(2)	Primary Negative Battery Cable
(3)	Primary Negative Battery Ground
(4)	G105
(5)	Engine Harness

Figure 8:

Lower Right Side of the Engine (6.6L)


(1)	Engine - 6.6L Diesel
(2)	Engine Harness
(3)	G102
(4)	Auxiliary Negative Battery Ground
(5)	Starter Relay Terminal
(6)	Starter Solenoid

Figure 9:

C201 and A/T Shift Lock Control Connector


(1)	Inline Connector C201
(2)	Inline Connector C201
(3)	Inflatable Restraint Harness
(4)	Inflatable Restraint Electrical Connector
(5)	Body Control Module (BCM) Bracket
(6)	Body Control Module (BCM) Harness
(7)	A/T Shift Lock Control Solenoid Connector
(8)	A/T Shift Lock Control Solenoid Electrical Connector
(9)	Lower Steering Column Shaft
(10)	Inflatable Restraint Steering Wheel Module Connector with Tether
(11)	Instrument Panel Bracket

Figure 10:

Instrument Cluster


(1)	Instrument Panel Cluster (IPC)
(2)	Inline Connector C202 M
(3)	Inline Connector C202 F
(4)	Instrument Cluster Electrical Connector
(5)	Instrument Panel Carrier
(6)	Instrument Panel

Figure 11:

Instrument Panel Harness Routing View


(1)	Instrument Panel
(2)	Instrument Panel Cluster Connector
(3)	Sunload Sensor
(4)	Radio Connectors
(5)	Daytime Running Lamps (DRL) Sensor
(6)	Air Temperature Sensor - Upper
(7)	Passenger Inflatable Restraint Module Connector
(8)	Inflatable Restraint Module Switch Connector
(9)	Inline Connector C206
(10)	Inline Connector C207
(11)	Speaker Connector
(12)	Compartment Lamp Connector
(13)	Fuse Block - Right I/P
(14)	Inline Connector to RH Door Harness
(15)	Inline Connector to RH Body Harness-06 only
(16)	Ashtray Lamp Connector
(17)	HVAC Control Module Connectors
(18)	Cigarette Lighter Connector
(19)	Power Accessary Connectors
(20)	Inline Connector C352
(21)	Inline Connector C307
(22)	Steering Column Connector
(23)	Inline Connector C340
(24)	Body Control Module Connectors
(25)	Cargo/Fog Switch Connector
(26)	Headlamp Switch Connector
(27)	Steering Column -SIR Connector
(28)	Fuse Block
(29)	Data Link Communication Connector
(30)	Inflatable Restraint Sensing And Diagnostic Module (SDM) Connector
(31)	Inline Connector C204
(32)	Inline Connector C200
(33)	Courtesy Lamp - Left
(34)	Relay Block - Body
(35)	Splice Pack SP203
(36)	Inline Connectors to Automatic Transfer Case -C151 C153
(37)	Inline Connector C102- I/P to Chassis Harness
(38)	Inline Connector C103 -I/P to Forward Lamp Harness
(39)	Fuse Block-Underhood
(40)	Instrument Panel Battery Feed Connectors
(41)	Trailer Power Feed Connector
(42)	Cruise Control/Throttle Actuator Connector
(43)	Underhood Lamp Connector
(44)	Speaker - Left Connector
(45)	Inline Connector C204 -I/P to LH Body Harness
(46)	Underhood Lamp Ground
(47)	I/P Harness to Plenum Ground
(48)	Windshield Wiper System Module Connector

Figure 12:

Chassis Wiring Harness to Front Frame -25 Series


(1)	Shock Absorber Solenoid-LF Connector
(2)	Wheel Speed Sensor (WSS)-LF Connector
(3)	Wheel Speed Sensor (WSS)-LF Connector
(4)	Suspension Position Sensor-LF Connector
(5)	Suspension Position Sensor-LF Connector
(6)	Chassis Harness
(7)	Shock Absorber Solenoid-RF Connector
(8)	Shock Absorber Solenoid-RF Connector
(9)	Suspension Position Sensor-RF Connector
(10)	Frame

Figure 13:

HVAC Module Assembly Connections, C296 and G200


(1)	Recirculation Actuator Connector
(2)	Instrument Panel
(3)	Electrical Harness Connector
(4)	G200
(5)	Blower Motor Resistor Assembly
(6)	Blower Motor Resistor Connector
(7)	C296
(8)	Air Temperature Actuator Connector
(9)	Air Temperature Actuator
(10)	Mode Actuator

Figure 14:

Headliner Harness to Relay Block - Body


(1)	A - Pillar
(2)	Headliner Wiring Harness
(3)	Relay Block - Body
(4)	Headliner Harness Connector C-6

Figure 15:

C200 and C204


(1)	C200 -I/P Harness Side
(2)	C204
(3)	A-Pillar
(4)	C200 -Door Harness Side

Figure 16:

C208 and C299


(1)	Side Cowl Panel
(2)	C299 -Door Harness Side
(3)	C299 -I/P Harness Side
(4)	C208 -Right Body Harness Side
(5)	C208 -I/P Harness Side

Figure 17:

C210 and Relay Block-Body-C4


(1)	Relay Block-Body
(2)	Relay Block-Body-C4
(3)	C210-Roof Beacon Relay Inline

Figure 18:

C304 and C299


(1)	Fuse Block - Right I/P
(2)	Fuse Block - Right I/P- C2
(3)	RF Door Harness
(4)	C304
(5)	C299

Figure 19:

LH Rear of Passenger Compartment


(1)	Side Inner Body Panel - LH
(2)	Panel Access Hole
(3)	Speaker - LR Connector
(4)	Speaker - LR Connector
(5)	Body Wiring Harness
(6)	Body Wiring Harness
(7)	Rear Glass -Defogger Grid Not Shown
(8)	Rear Defogger Grid Connector
(9)	Rear Defogger Grid Connector

Figure 20:

Driver/Passenger Power Seat Wiring -C301, C305 and C399


(1)	C305
(2)	C399
(3)	Power Seat Wiring Harness to Heated Seat Switch
(4)	C301

Figure 21:

Driver Seat (w/Memory -- 1 of 2)


(1)	Inline Connector C324
(2)	Memory Seat Module-C2
(3)	Memory Seat Module-C1
(4)	Memory Seat Module
(5)	Inline Connector C321
(6)	Inline Connector C320
(7)	Memory Seat Module-C3
(8)	Positive Temperature Coefficient (PTC) Thermistor
(9)	Inline Connector C305
(10)	Inflatible Restraint Side Impact Sensor (SIS) - Left Connector
(11)	Inline Connector C323
(12)	Inline Connector C325
(13)	Inline Connector C322
(14)	Heated Seat Relay and Logic
(15)	Seat Belt Switch Connector
(16)	Seat Heater Element Connector