Chevrolet Avalanche (2003-2006) Fuse Diagram

Fuse box diagram (fuse layout), location and assignment of fuses and relays Chevrolet Avalanche and Cadillac Escalade EXT (2003, 2004, 2005, 2006).

Chevrolet Avalanche (2003-2006)

Checking and Replacing Fuses

The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers, and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems.

Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating.

If you ever have a problem on the road and don’t have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of your vehicle that you can get along without – like the radio or cigarette lighter – and use its fuse if it is the correct amperage. Replace it as soon as you can.


  • Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
  • Do not repair fuses and never replace a blown fuse with one that has a higher amp rating. This can cause damage to the electrical system and fire.
  • Never replace a broken fuse with anything other than a new fuse. Use always an intact fuse of the same color.
  • If a fuse blows again contact authorized services
  • Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
  • To remove fuses if you don’t have a fuse extractor, hold the end of the fuse between your thumb and index finger and pull straight out.

Instrument Panel Fuse Block

The fuse box access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the fuses.

Instrument Panel Fuse Block Location

Instrument Panel Fuse Box Diagram

AProtected Component
1- -
210HVAC Components, Electronic Suspension Control (ESC) Components, Heated Seat Modules (Rear), Wheel Steering Control Module
315Front Axle Actuator, Transfer Case Shift Control Switch
410Passlock Sensor, Transmission Control Module (TCM), Powertrain Control Module (PCM)
515Stop Lamps, Brake Module, Electronic Throttle Actuator Control
615Driver Door Module (DDM)
710HVAC Control Assembly (Rear Auxiliary)
810Upfitter Provisions
930HVAC Control Module
1010HVAC Control Module, HVAC Actuators, Inside Rearview Mirror
1110Cruise Control Switch, Steering Wheel Speed/Position Sensor
1210Stop Lamp Switch, Electronic Brake Control Module (EBCM), Traction Control Switch
1310Body Control Module (BCM)
1410Center High Mounted Stop Lamp (CHMSL)
1525Windshield Wiper Motor Module
1610Body Control Module (BCM)
1710Left Turn Signal/Stop Trailer  
1810Right Turn Signal/Stop Trailer
1920Power Outlet (D-Pillar)
2015Body Control Module (BCM)
2115Body Control Module (BCM)
2210Left Turn Signals and Side Markers Lamps, Instrument Panel Cluster, Driver Door Module (DDM)
2310Right Turn Signals and Side Markers Lamps, Instrument Panel Cluster, Front Passenger Door Module (FPDM)
2420Door Lock/Unlock Relay
2525Turn Signal/Hazard Flasher Module
2615Body Control Module (BCM)
2710Front Passenger Door Module (FPDM)
Circuit Breaker
CB125Left Power Window (Left Rear Power Window and Driver Door Module)
R1Power Door Lock
R2Power Door Unlock
R4 -
R5Rear Fog Lamps


Center Instrument Panel Fuse Block

It is located underneath the instrument panel, to the left of the steering column.

Center Instrument Panel Fuse Block

ACircuit Breaker
CB130Driver and Passenger Seat Module, Memory Seat Module
CB225Right Power Window (Front Passenger Door Module (FPDM), Right Rear Power Window)
R1Rear Window Defogger 
R2 -

Underhood Fuse Box

The underhood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block.

Underhood Fuse Box Location

Underhood Fuse Box Diagram



AProtected Component
140Trailer Wiring, Automatic Level Control (ALC) Compressor Relay
2- -
350Circuit Breaker (Passenger Compartment Relay Box): "CB1", "CB2"
440Blower Motor 
550Fuse (Passenger Compartment): "6", "19", "24" "27"
630Off Road Lamps, Trailer Wiring 
760Electronic Brake Control Module (EBCM)
860Electronic Brake Control Module (EBCM), Automatic Level Control (ALC) Compressor
940Ignition Switch
10- -
1140Ignition Switch
1250Fuse (Passenger Compartment): "20", "21", "25" "26", "CB1"
1315Parking Lamps Trailer Wiring
1410Right Rear Parking and Side Marker Lamps
1510Left Rear Parking and Side Marker Lamps
1610Interior Lamps
1725Stop Lamp Switch
1810Body Control Module (BCM), Pass-Key Module
1925Sunroof Relay
2030Roof Beacon Relay, Off-Road Lamps 
2115Rear Wheel Steering Control Module, Evaporative Emission (EVAP) Canister Vent Solenoid
2230HVAC Control Assembly (Rear Auxiliary)
2320Accessory Power Outlets, Auxiliary Power Outlets
2415Powertrain Control Module (PCM), Mass Air Flow (MFS) Sensor, Evaporative Emission (EVAP) Canister Purge Solenoid, Fuel Composition Sensor, Secondary Fuel Pump Relay
2515Throttle Actuator Control (TAC), Electronic Brake Controller
2615Odd: Ignition Coils, Fuel Injectors
2715Even: Ignition Coils, Fuel Injectors
2810A/C Compressor Relay, Park/Neutral Position (PNP) Swtich, Turn Signal/Multifunction Switch, Headlamp Leveling Components, Instrument Panel Cluster, Clutch Start Switch
2930Automatic Level Control (ALC) Compressor, Electronic Suspension Control (ESC) Module
3010Backup Lamps Trailer Wiring, Back-Up Alarm, Body Control Module (BCM)
31 20Powertrain Control Module, Fuel Pump
32 15Oxygen Sensors
3320Backup Lamps, Park/Neutral Position Switch (PNP)
3430Rear Window Defogger Relay
3515Oxygen Sensors
3615Inflatable Restraint Sensing and Diagnostic Module (SDM), Memory Seat Module (Passenger), Inside Reaview Mirror
3710Front Parking Lamps, Front Side Marker Lamps
3810Rear Window Defogger Relay, Instrument Panel Cluster (IPC), Rear Object Sensor Control Module, Selectable Ride Switch
3910Body Control Module (BCM)
4010Left Headlamp (High Beam)
4120Left Headlamp (Xenon)
4210Daytime Running Light Relay
4310Instrument Panel Cluster/Driver Information Center
4410HVAC Control Module
4515Cigarette Lighter, Data Link Connector
4610Right Headlamp (High Beam)
4710Air Conditioning Compressor Relay
48- -
49- -
5015Audio System, Digital Radio Receiver, Rear Seat Audio
5115Insturment Panel Cluster (IPC), Rear Fog Lamp Relay, Overhead Console, Roof Beacon Switch, Rear Heated Seats, HomeLink (Garage Door Opener)
5210Left Headlamp (Low Beam)
5310Brake Transmission Shift Interlock System
5410Starting System, Powertrain Control Module (Gasoline), Engine Control Module (Diesel), Transmission Control Module (TCM)
5510Right Headlamp (Low Beam)
5615Front Fog Lamps Relay
5715Windshield Washer Pump
5815Vehicle Communication Interface Module (VCIM), Rear Seat Entertainment (RSE) Assembly, Remote Playback Device-CD Player
5930Radio Amplifier
6020Right Headlamp (Xenon)
6215Electronic Adjustable Pedals (EAP) Relay
6330Transfer Case Encoder Motor, Transfer Case Shift Control Module
6415Supplemental Brake Assist Pump Motor, Fuel Pump Relay (Secondary)
65125Cust Feed
6610Generator Battery Control Module
R1Parking Lamps, Side Marker Lamps
R4Fuel Pump
R5Headlamp High Beam
R6Daytime Running Light
R7Headlamp (Low Beam)
R8Air Conditioning Compressor
R9Front Fog Lamps
R11Windshield and Rear Window Washer Pump

Engine Compartment Relay Box (10 Series)

Engine Compartment Relay Box

ACircuit Breaker
140Cooling Fan Relay №1
240Cooling Fan Relay №2
310Cooling Fan Relay №3
R1Cooling Fan (Left)
R2Cooling Fan (Left/Right - High Speed)
R3Cooling Fan (Left/Right - Low Speed)