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Fuse box diagram (fuse layout), location and assignment of fuses and relays Chevrolet Avalanche and Cadillac Escalade EXT (2003, 2004, 2005, 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.
Note
- 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.
| № | A | Protected Component |
|---|---|---|
| 1 | - | - |
| 2 | 10 | HVAC Components, Electronic Suspension Control (ESC) Components, Heated Seat Modules (Rear), Wheel Steering Control Module |
| 3 | 15 | Front Axle Actuator, Transfer Case Shift Control Switch |
| 4 | 10 | Passlock Sensor, Transmission Control Module (TCM), Powertrain Control Module (PCM) |
| 5 | 15 | Stop Lamps, Brake Module, Electronic Throttle Actuator Control |
| 6 | 15 | Driver Door Module (DDM) |
| 7 | 10 | HVAC Control Assembly (Rear Auxiliary) |
| 8 | 10 | Upfitter Provisions |
| 9 | 30 | HVAC Control Module |
| 10 | 10 | HVAC Control Module, HVAC Actuators, Inside Rearview Mirror |
| 11 | 10 | Cruise Control Switch, Steering Wheel Speed/Position Sensor |
| 12 | 10 | Stop Lamp Switch, Electronic Brake Control Module (EBCM), Traction Control Switch |
| 13 | 10 | Body Control Module (BCM) |
| 14 | 10 | Center High Mounted Stop Lamp (CHMSL) |
| 15 | 25 | Windshield Wiper Motor Module |
| 16 | 10 | Body Control Module (BCM) |
| 17 | 10 | Left Turn Signal/Stop Trailer |
| 18 | 10 | Right Turn Signal/Stop Trailer |
| 19 | 20 | Power Outlet (D-Pillar) |
| 20 | 15 | Body Control Module (BCM) |
| 21 | 15 | Body Control Module (BCM) |
| 22 | 10 | Left Turn Signals and Side Markers Lamps, Instrument Panel Cluster, Driver Door Module (DDM) |
| 23 | 10 | Right Turn Signals and Side Markers Lamps, Instrument Panel Cluster, Front Passenger Door Module (FPDM) |
| 24 | 20 | Door Lock/Unlock Relay |
| 25 | 25 | Turn Signal/Hazard Flasher Module |
| 26 | 15 | Body Control Module (BCM) |
| 27 | 10 | Front Passenger Door Module (FPDM) |
| CB1 | 25 | Left Power Window (Left Rear Power Window and Driver Door Module) |
| R1 | Power Door Lock | |
| R2 | Power Door Unlock | |
| R4 | - | |
| R5 | Rear Fog Lamps | |
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Center Instrument Panel Fuse Block
It is located underneath the instrument panel, to the left of the steering column.
| № | A | Circuit Breaker |
|---|---|---|
| CB1 | 30 | Driver and Passenger Seat Module, Memory Seat Module |
| CB2 | 25 | Right Power Window (Front Passenger Door Module (FPDM), Right Rear Power Window) |
| R1 | Rear 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.
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| № | A | Protected Component |
|---|---|---|
| 1 | 40 | Trailer Wiring, Automatic Level Control (ALC) Compressor Relay |
| 2 | - | - |
| 3 | 50 | Circuit Breaker (Passenger Compartment Relay Box): "CB1", "CB2" |
| 4 | 40 | Blower Motor |
| 5 | 50 | Fuse (Passenger Compartment): "6", "19", "24" "27" |
| 6 | 30 | Off Road Lamps, Trailer Wiring |
| 7 | 60 | Electronic Brake Control Module (EBCM) |
| 8 | 60 | Electronic Brake Control Module (EBCM), Automatic Level Control (ALC) Compressor |
| 9 | 40 | Ignition Switch |
| 10 | - | - |
| 11 | 40 | Ignition Switch |
| 12 | 50 | Fuse (Passenger Compartment): "20", "21", "25" "26", "CB1" |
| 13 | 15 | Parking Lamps Trailer Wiring |
| 14 | 10 | Right Rear Parking and Side Marker Lamps |
| 15 | 10 | Left Rear Parking and Side Marker Lamps |
| 16 | 10 | Interior Lamps |
| 17 | 25 | Stop Lamp Switch |
| 18 | 10 | Body Control Module (BCM), Pass-Key Module |
| 19 | 25 | Sunroof Relay |
| 20 | 30 | Roof Beacon Relay, Off-Road Lamps |
| 21 | 15 | Rear Wheel Steering Control Module, Evaporative Emission (EVAP) Canister Vent Solenoid |
| 22 | 30 | HVAC Control Assembly (Rear Auxiliary) |
| 23 | 20 | Accessory Power Outlets, Auxiliary Power Outlets |
| 24 | 15 | Powertrain Control Module (PCM), Mass Air Flow (MFS) Sensor, Evaporative Emission (EVAP) Canister Purge Solenoid, Fuel Composition Sensor, Secondary Fuel Pump Relay |
| 25 | 15 | Throttle Actuator Control (TAC), Electronic Brake Controller |
| 26 | 15 | Odd: Ignition Coils, Fuel Injectors |
| 27 | 15 | Even: Ignition Coils, Fuel Injectors |
| 28 | 10 | A/C Compressor Relay, Park/Neutral Position (PNP) Swtich, Turn Signal/Multifunction Switch, Headlamp Leveling Components, Instrument Panel Cluster, Clutch Start Switch |
| 29 | 30 | Automatic Level Control (ALC) Compressor, Electronic Suspension Control (ESC) Module |
| 30 | 10 | Backup Lamps Trailer Wiring, Back-Up Alarm, Body Control Module (BCM) |
| 31 | 20 | Powertrain Control Module, Fuel Pump |
| 32 | 15 | Oxygen Sensors |
| 33 | 20 | Backup Lamps, Park/Neutral Position Switch (PNP) |
| 34 | 30 | Rear Window Defogger Relay |
| 35 | 15 | Oxygen Sensors |
| 36 | 15 | Inflatable Restraint Sensing and Diagnostic Module (SDM), Memory Seat Module (Passenger), Inside Reaview Mirror |
| 37 | 10 | Front Parking Lamps, Front Side Marker Lamps |
| 38 | 10 | Rear Window Defogger Relay, Instrument Panel Cluster (IPC), Rear Object Sensor Control Module, Selectable Ride Switch |
| 39 | 10 | Body Control Module (BCM) |
| 40 | 10 | Left Headlamp (High Beam) |
| 41 | 20 | Left Headlamp (Xenon) |
| 42 | 10 | Daytime Running Light Relay |
| 43 | 10 | Instrument Panel Cluster/Driver Information Center |
| 44 | 10 | HVAC Control Module |
| 45 | 15 | Cigarette Lighter, Data Link Connector |
| 46 | 10 | Right Headlamp (High Beam) |
| 47 | 10 | Air Conditioning Compressor Relay |
| 48 | - | - |
| 49 | - | - |
| 50 | 15 | Audio System, Digital Radio Receiver, Rear Seat Audio |
| 51 | 15 | Insturment Panel Cluster (IPC), Rear Fog Lamp Relay, Overhead Console, Roof Beacon Switch, Rear Heated Seats, HomeLink (Garage Door Opener) |
| 52 | 10 | Left Headlamp (Low Beam) |
| 53 | 10 | Brake Transmission Shift Interlock System |
| 54 | 10 | Starting System, Powertrain Control Module (Gasoline), Engine Control Module (Diesel), Transmission Control Module (TCM) |
| 55 | 10 | Right Headlamp (Low Beam) |
| 56 | 15 | Front Fog Lamps Relay |
| 57 | 15 | Windshield Washer Pump |
| 58 | 15 | Vehicle Communication Interface Module (VCIM), Rear Seat Entertainment (RSE) Assembly, Remote Playback Device-CD Player |
| 59 | 30 | Radio Amplifier |
| 60 | 20 | Right Headlamp (Xenon) |
| 61 | 15 | Horn |
| 62 | 15 | Electronic Adjustable Pedals (EAP) Relay |
| 63 | 30 | Transfer Case Encoder Motor, Transfer Case Shift Control Module |
| 64 | 15 | Supplemental Brake Assist Pump Motor, Fuel Pump Relay (Secondary) |
| 65 | 125 | Cust Feed |
| 66 | 10 | Generator Battery Control Module |
| R1 | Parking Lamps, Side Marker Lamps | |
| R2 | Starter | |
| R3 | Ignition | |
| R4 | Fuel Pump | |
| R5 | Headlamp High Beam | |
| R6 | Daytime Running Light | |
| R7 | Headlamp (Low Beam) | |
| R8 | Air Conditioning Compressor | |
| R9 | Front Fog Lamps | |
| R10 | Horn | |
| R11 | Windshield and Rear Window Washer Pump | |
Engine Compartment Relay Box (10 Series)
| № | A | Circuit Breaker |
|---|---|---|
| 1 | 40 | Cooling Fan Relay №1 |
| 2 | 40 | Cooling Fan Relay №2 |
| 3 | 10 | Cooling Fan Relay №3 |
| R1 | Cooling Fan (Left) | |
| R2 | Cooling Fan (Left/Right - High Speed) | |
| R3 | Cooling Fan (Left/Right - Low Speed) | |
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