2003-2006 Chevrolet Avalanche & Cadillac Escalade EXT
Location and description of fuses and relay Chevrolet Avalanche 1500 - Z71, Z66, LS, LT & 2500 - LS, LT and Cadillac Escalade EXT with engine 5.3L V8, 6.0L V8 and 8.1L V8 (2003, 2004, 2005, 2006)
Engine Compartment Fuse Box

| No. | A | Description |
|---|---|---|
| 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/? 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 |
| Relay | ||
| 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 | |
Passenger Compartment Fuse Box

| No. | A | Description |
|---|---|---|
| 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) |
| Circuit Breaker | ||
| CB1 | 25 | Left Power Window (Left Rear Power Window and Driver Door Module) |
| Relay | ||
| R1 | Power Door Lock | |
| R2 | Power Door Unlock | |
| R4 | - | |
| R5 | Rear Fog Lamps | |
Passenger Compartment Relay Box

| No. | A | Description |
|---|---|---|
| CB1 | 30 | Driver and Passenger Seat Module, Memory Seat Module |
| CB2 | 25 | Right Power Window (Front Passenger Door Module (FPDM), Right Rear Power Window) |
| Relay | ||
| R1 | Rear Window Defogger | |
| R2 | - | |
Engine Compartment Relay Box (10 Series)

| No. | A | Description |
|---|---|---|
| 1 | 40 | Cooling Fan Relay No.1 |
| 2 | 40 | Cooling Fan Relay No.2 |
| 3 | 10 | Cooling Fan Relay No.3 |
| Relay | ||
| R1 | Cooling Fan (Left) | |
| R2 | Cooling Fan (Left/Right - High Speed) | |
| R3 | Cooling Fan (Left/Right - Low Speed) | |





