Harness Routing Views. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2004 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 Harness Routing Views

Figure 1:

LH Front of Vehicle


(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 Connector C125-Option
(12)	Headlamp Connector-Low Beam-Left
(13)	Marker Lamp-LF

Figure 2:

C103


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

Figure 3:

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 4:

C148 and C149


(1)	C149 Engine Harness to Even Ignition Coil Harness
(2)	C148 Engine Harness to Odd Ignition Coil Harness
(3)	Throttle Body

Figure 5:

Inline Connectors Under the Fuse Block-Underhood


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

Figure 6:

Engine Harness Connector Locations-8.1L


(1)	MAP Switch Connector
(2)	Surge Tank Switch Connector
(3)	Secondary Air Injection (AIR) Solenoid Relay Connector
(4)	Secondary Air Injection (AIR) Pump Connector
(5)	MAP Sensor Connector
(6)	A/C Compressor Connector
(7)	Engine Wiring Harness Ground
(8)	Oil Pressure Sensor Connector
(9)	Oil Pressure Sensor Connector
(10)	Starter Connector
(11)	Knock Sensor Connector
(12)	Automatic Transmission Input Speed Sensor (ISS) Connector
(13)	Oxygen Sensor Connector
(14)	Turbine Shaft Speed (TSS) Sensor Connector
(15)	Oxygen Sensor Connector
(16)	Power Take Off (PTO) Connector
(17)	Transmission Harness Connector
(18)	Speed Sensor Connector
(19)	Park/Neutral Position (PNP) Switch Connectors
(20)	Oxygen Sensor Connector
(21)	Low Oil Level Sensor Connector
(22)	Crankshaft Position Sensor Connector
(23)	Knock Sensor Connector
(24)	Ignition Coil Connector
(25)	Engine Wiring Harness Ground
(26)	Camshaft Position Sensor Connector
(27)	Powertrain Control Module (PCM) Connectors
(28)	Power Take Off (PTO) Relay Connector
(29)	Inline to IP Harness Connector
(30)	Inline to Chassis Harness Connector
(31)	Junction Block-Underhood
(32)	Transmission Control Module Connectors (M74)
(33)	Throttle Actuator Control (TAC) Module Connector
(34)	Throttle Position (TP) Sensor Connector
(35)	Generator Connector
(36)	Fuel Injector Connector
(37)	Electric Throttle Control Connector

Figure 7:

I/P Harness Routing - Left Side of I/P Console


(1)	C202 I/P Harness to Brake/Clutch Harness
(2)	C214 I/P Harness to Headliner Harness (w/UE1/U42)
(3)	C214 I/P Harness to Headliner Harness (w/UE1/U42)
(4)	G203 (1851)
(5)	C203 I/P to Left Front Door Harness (w/JF4)
(6)	C221 I/P Harness to Body Harness
(7)	C204 I/P Harness to Body Harness
(8)	Splice Pack SP250 (w/UQ7)
(9)	C201 I/P Harness to Steering Column Harness
(10)	C275 I/P Harness to Inflatable Restraint Steering Wheel Module
(11)	Splice Pack SP205

Figure 8:

I/P Harness Routing - Right Side of I/P Console


(1)	C306 I/P Harness or Infotainment Jumper Harness to Console Harness
(2)	C249 I/P Harness to Info Jumper Harness (Except Y91)
(3)	C230 I/P Harness to Roofmarker Harness
(4)	I/P Harness to Roof Marker Coax
(5)	C231 I/P Harness to Diversity Antenna Harness (Z75 except EXT)
(6)	Fuse Block - Right I/P C1
(7)	C222 I/P Harness to Body Harness
(8)	C209 I/P Harness to Body Harness

Figure 9:

HVAC Module Assembly (Connections)


(1)	Recirculation Actuator Connector
(2)	Instrument Panel
(3)	Electrical Harness Connector
(4)	Ground 200 (G200)
(5)	Blower Motor Resistor Assembly
(6)	Blower Motor Resistor Connector
(7)	Harness Inline Connector (C296)
(8)	Air Temperature Actuator Connector
(9)	Air Temperature Actuator
(10)	Mode Actuator

Figure 10:

Lower RF of the Passenger Compartment


(1)	C222
(2)	C315 (AJ7)
(3)	Body Harness
(4)	C209

Figure 11:

C210 and Relay Block-Body-C4


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

Figure 12:

C306 - Avalanche/Suburban


(1)	C306
(2)	Front Floor Console Extension
(3)	Speaker - Subwoofer
(4)	I/P Harness

Figure 13:

Driver Seat (1 of 2)


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

Figure 14:

Driver Seat (2 of 2)


(1)	Seat Bolster Motor - Driver
(2)	Seat Lumbar Motor - Driver
(3)	Heated Seat Element - Driver Cushion
(4)	C324
(5)	Seat Belt Switch Connector
(6)	Heated Seat Element - Driver Cushion Connector

Figure 15:

Front Passenger Seat (1 of 2) (w/ AN3)


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

Figure 16:

Front Passenger Seat (2 of 2) (w/ AN3)


(1)	Seat Bolster Motor - Front Passenger
(2)	Seat Lumbar Motor - Front Passenger
(3)	Heated Seat Element - Front Passenger Cushion Connector
(4)	C329

Figure 17:

C327


(1)	Seat-LR
(2)	C327-Inline to Rear Seat Harness
(3)	LH Body Harness

Figure 18:

Right Body Harness to Rear Seat Harness


(1)	Rear Seat
(2)	Rear Seat Harness Connector (Inline C349)
(3)	Right Body Harness Connector (Inline C349)
(4)	Right Body Harness

Figure 19:

C388


(1)	Seat-RR
(2)	C388-Inline to Seat Harness-RR

Figure 20:

Rear Audio Console Harness Connectors


(1)	Front Floor Compartment
(2)	I/P Harness
(3)	Inline Connector 307 (Uplevel Utility), Inline 340 (Luxury Utility)
(4)	Inline Connector 307 (Uplevel Utility), Inline 340 (Luxury Utility)
(5)	Console Harness
(6)	Inline Connector 314 (Rear Console Harness Side)
(7)	Inline Connector 314 (LH body Harness Side)

Figure 21:

C314 and C341-LH Body Harness to Console


(1)	C341-Avalanche (53 Similar)
(2)	Left Body Harness
(3)	C314-Left Body Harness Side-Luxury Utility
(4)	C314-Console Harness Side-Luxury Utility

Figure 22:

Rear Audio Extension Harness Connectors


(1)	Instrument Panel
(2)	Radio Connectors
(3)	Console Extension Harness
(4)	Inline Connector 253 (IP Harness Side)
(5)	Inline Connector 253 (Console Extension Harness Side)
(6)	Compact Disc Player Connector
(7)	Front Floor Console Extension
(8)	Instrument Panel Harness
(9)	Radio

Figure 23:

Rear HVAC Harness


(1)	Inner Body Side Panel
(2)	Splice Pack 410 (SP410)
(3)	Splice Pack 410A (SP410A)
(4)	Blower Motor Connector
(5)	HVAC Assembly - Auxiliary
(6)	Air Temperature Sensor-Lower Auxiliary
(7)	Mode Actuator-Auxiliary Connector
(8)	Inline Connector 350 -Auxiliary HVAC Harness Side
(9)	Inline Connector 350 -Headliner Harness Side
(10)	Inline Connector 397 -Auxiliary HVAC Harness Side
(11)	Inline Connector 397 -RH Body Harness Side

Figure 24:

Body Harness Rear RH


(1)	Back Body Opening Inner Upper Panel
(2)	CHSML Cargo
(3)	Door Lock Switch Rear Cargo
(4)	Splice Pack 410
(5)	Speaker - RR Connector
(6)	Inline to Headliner

Figure 25:

Body Harness Rear LH


(1)	Body Side Inner Panel
(2)	Body Harness-LH
(3)	Speaker- Subwoofer Connector
(4)	Speaker-LR -D Pillar

Figure 26:

Rear Body Harness - Avalanche/Esclade EXT


(1)	C392
(2)	Rear Window Defogger - Ground
(3)	C390
(4)	Rear Window Defogger - Power
(5)	C415 (Z75)
(6)	Passthrough to Chassis Harness (Z75)
(7)	Body Harness
(8)	C450 (Z75)
(9)	Cargo Lamp - Driver (RH Similar)

Figure 27:

C402


(1)	C402-Chassis Harness Side
(2)	C402-Tail Lamp Harness Side

Figure 28:

Chassis Wiring Harness to Rear Side Rail-LH


(1)	Inline Connector C405 to Tail Lamp Harness
(2)	Shock Absorber Solenoid Connector-RR
(3)	Frame
(4)	Inline Connector C450
(5)	Chassis Harness

Figure 29:

C406 and P475-Escalade/Avalanche EXT w/VSES


(1)	P475
(2)	C406-RH Body Harness Side
(3)	C406-Tail Lamp Harness Side
(4)	Junction Block-C3-Rear Lamps

Figure 30:

Real Time Damping Connector to Body Wiring Harness


(1)	Inline Connector C450 -Chassis Harness Side
(2)	Inline Connector C450 -Body Harness Side
(3)	Frame

Figure 31:

Liftgate Wiring Harness to Liftgate


(1)	Liftgate with Liftglass
(2)	Liftglass Defog Connector
(3)	Liftgate Latch Connector
(4)	Liftgate Lower Latch Connector
(5)	Liftgate Latch Connector
(6)	Liftgate Lower Latch Connector
(7)	Liftgate Latch Connector
(8)	Wiper Motor Connector
(9)	Inline Connector C499

Figure 32:

Rear Lamp Harness to Rear License Plate/Tail Lamp Harness-RH (LH Similiar)


(1)	Back Body Opening Lower Frame
(2)	Rear Lamp Wiring Harness
(3)	Inline Connector 403 -Rear Lamp Harness Side
(4)	Inline Connector 403 -Tail Lamp Harness Side
(5)	Inline Connector 404 -Rear Lamp Harness Side
(6)	Inline Connector 404 -Rear License Plate Harness Side
(7)	License Plate Wiring Harness

Figure 33:

Junction Block-Rear Lamps-C1 and C2


(1)	C2-Gray
(2)	Body Panel-RH Side
(3)	Junction Block-Rear Lamps
(4)	C1-Blue

Figure 34:

Junction Block-Rear Lamps-C3 and C4


(1)	Junction Block-Rear Lamps-Utility
(2)	C4-Tail Lamp Harness -RH
(3)	C3-Rear License Lamp Harness-RH

Figure 35:

Auxiliary Power Center - 9L4


(1)	Underhood Fuse Block
(2)	Battery
(3)	40A Mega Fuse
(4)	C117
(5)	Accessory Jumper Harness
(6)	C119
(7)	I/P Carrier
(8)	Auxiliary Power Harness
(9)	C216
(10)	Brake/Clutch Harness
(11)	Passthrough P101
(12)	I/P Relay Block
(13)	Auxiliary Power Fuse/Relay Block
(14)	Glove Box Opening
(15)	C5
(16)	I/P Relay Block
(17)	C8

Figure 36:

Roof Lamp Wiring Provisions - 5G4


(1)	Blunt Cut Wires for Roof Light
(2)	Roof Light Switch
(3)	C250
(4)	I/P Jumper Harness
(5)	Roof Light Relay
(6)	G305
(7)	C210
(8)	Relay Block C8
(9)	Relay Block C9
(10)	Relay Block - I/P
(11)	Brake/Clutch Harness