Explore Chevrolet Trailblazer fuse box diagrams in this practical guide built to help you understand the electrical layout of this rugged first-generation SUV. Here we cover the first-generation Chevrolet Trailblazer (2001–2008) and provide fuse diagrams for 2002, 2003, 2004, 2005, 2006, 2007, 2008 and 2009 , along with the location of the fuse panels and the assignment of each fuse and relay , giving you a dependable reference for diagnostics and maintenance.
It is located in the engine compartment on the driver’s side, under two covers.
Assignment of the fuses in the Under-hood Fuse Box, L6 engine (2002, 2003)
Fuse Data
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No. Description 1 Electrically-Controlled Air Suspension 2 Passenger’s Side Hiqh-Beam Headlamp 3 Passenger’s Side Low-Beam Headlamp 4 Back-Up-Trailer Lamps 5 Driver’s Side High-Beam Headlamp 6 Driver s Side Low-Beam Headlamp 7 WASH 8 Automatic Transfer Case g Windshield Wipers 10 Powertrain Control Module B 11 Fog Lamps 12 Stop Lamp 13 Cigarette Lighter 14 Ignition Coils 15 Air Suspension Ride 16 TBD-Ignition 1 17 Crank 18 Air Bag 19 Electric Brake 20 Cooling Fan 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Dnver Information Center 25 Automatic Shift Lock Control System 26 Engine 1 27 Back-Up 28 Powertrain ControJ Module 1 29 Oxygen Sensor 30 Air Conditioning 31 Truck Body Controller 32 Trailer 33 Anti-Lock Brakes (ABS) 34 Ignition A 35 Blower Motor 36 Ignition B 50 Passenger s Side Trailer Turn 51 Driver s Side Trailer Turn 52 Hazard Flashers
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Assignment of the relays in the Under-hood Fuse Box, L6 engine (2002, 2003)
Fuse Data
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No. Description 37 Blank 38 Rear Window Washer 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Wipers/Washer 43 High-Beam Headlamp 44 Air Conditioning 45 Cooling Fan 46 Headlamp Driver Modulo 47 Starter
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Assignment of the miscellaneous in the Under-hood Fuse Box, L6 engine (2002, 2003)
Fuse Data
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No. Description 48 Instrument Panel Battery 49 Fuse Puller
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Assignment of the fuses in the Under-hood Fuse Box, L6 engine (2004, 2005, 2006)
Fuse Data
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No. Description 1 Electrically-Controlled Air-suspension 2 Passenger’s Side High-Beam Headlamp 3 Passenger’s Side Low-Beam Headlamp 4 Back-Up Trailer Lamps 5 Driver’s Side High-Beam Headlamp 6 Driver’s Side Low-Beam Headlamp 7 Rear Window Washer, Headlamp Washer 8 Automatic Transfer Case 9 Windshield Washer 10 Powertrain Control Module B 11 Fog Lamps 12 Stoplamp 13 Cigarette Lighter 14 2004-2005: Ignition Coils 15 Electric Adjustable Pedal 16 Truck Body Controller, Ignition 1 17 Crank 18 Airbag 19 Trailer Electric Brake 20 Cooling Fan 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Driver Information Center 25 Automatic Shift Lock Control System 26 2004: Backup 27 2004: Engine 1 28 Powertrain Control Module 1 29 Oxygen Sensor 30 Air Conditioning 31 Truck Body Controller 32 Trailer 33 Anti-Lock Brakes (ABS) 34 Ignition A 35 Blower Motor 36 Ignition B 50 Passenger’s Side Trailer Turn 51 Driver’s Side Trailer Turn 52 Hazard Flashers 53 2004: Electric Adjustable Pedal 54 Air Injection Reactor (AIR) Solenoid 56 Air Injection Reactor (AIR) Pump
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Assignment of the relays in the Under-hood Fuse Box, L6 engine (2004, 2005, 2006)
Fuse Data
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No. Description 37 Headlamp Washer 38 Rear Window Washer 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Washer 43 High-Beam Headlamp 44 Air Conditioning 45 Cooling Fan 46 Headlamp Driver Module 47 Starter 49 Electric Adjustable Pedal 55 Air Injection Reactor (AIR) Solenoid 57 Powertrain (2006) 58 Vehicle Stability Enhancement System (StabiliTrak) (2006)
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Assignment of the miscellaneous in the Under-hood Fuse Box, L6 engine (2004, 2005, 2006)
Fuse Data
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No. Description 48 Instrument Panel Battery
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Assignment of the fuses and in the Under-hood Fuse Box, L6 engine (2007, 2008)
Fuse Data
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No. Description 1 Electrically-Controlled Air Suspension 2 Passenger Side High-Beam Headlamp 3 Passenger Side Low-Beam Headlamp 4 Back-Up Trailer Lamps 5 Driver Side High-Beam Headlamp 6 Driver Side Low-Beam Headlamp 7 Windshield Wiper 8 Automatic Transfer Case 9 Windshield Washer 10 Powertrain Control Module B 11 Fog Lamps 12 Stoplamp 13 Cigarette Lighter 14 Not Used 15 Electric Adjustable Pedal 16 Truck Body Controller, Ignition 1 17 Crank 18 Airbag 19 Trailer Electric Brake 20 Cooling Fan 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Driver Information Center 25 Automatic Shift Lock Control System 26 Transmission Control Module (TCM) Canister 27 Backup 28 Powertrain Control Module 1 29 Oxygen Sensor 30 Air Conditioning 31 Truck Body Controller 1 32 Trailer 33 Antilock Brakes (ABS) 34 Ignition A 35 Blower Motor 36 Ignition B 50 Passenger Side Trailer Turn 51 Driver Side Trailer Turn 52 Hazard Flashers 53 Headlamp Driver Module 54 Air Injection Reactor (AIR) Solenoid 56 Air Injection Reactor (AIR) Pump 58 Vehicle Stability Enhancement System (StabiliTrak) 59 Regulated Voltage Control
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Assignment of the relays and in the Under-hood Fuse Box, L6 engine (2007, 2008)
Fuse Data
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No. Description 37 Headlamp Washer 38 Rear Window Wiper/Washer 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Washer 43 High-Beam Headlamp 44 Air Conditioning 45 Cooling Fan 46 Headlamp Driver Module 47 Starter 49 Electric Adjustable Pedal 55 Air Injection Reactor (AIR) Solenoid 57 Powertrain
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Assignment of the miscellaneous fuses and in the Under-hood Fuse Box, L6 engine (2007, 2008)
Fuse Data
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No. Description 48 Instrument Panel Battery
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Assignment of the fuses in the Under-hood Fuse Box (2009)
Fuse Data
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No. Description 1 Electrically-Controlled Air Suspension 2 Passenger Side High-Beam Headlamp 3 Passenger Side Low-Beam Headlamp 4 Back-Up Trailer Lamps 5 Driver Side High-Beam Headlamp 6 Driver Side Low-Beam Headlamp 7 Windshield Wiper 8 Active Transfer Case 9 Windshield Washer 10 Powertrain Control Module B 11 Fog Lamps 12 Stoplamp 13 Cigarette Lighter 14 Ignition Coils 15 Transmission Control Module Canister 16 Truck Body Controller, Ignition 1 17 Crank 18 Airbag 19 Trailer Electric Brake 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Driver Information Center 25 Brake Transmission Shift Interlock 26 Engine 1 27 Backup 28 Engine Control Module 1 29 Engine Control Module 30 Air Conditioning 31 Injector A 32 Trailer 33 Antilock Brakes (ABS) 34 Ignition A 35 Blower 36 Ignition B 50 Passenger Side Trailer Turn 51 Driver Side Trailer Turn 52 Hazard Flashers 53 Transmission 54 Oxygen Sensor B 55 Oxygen Sensor A 56 Injector B 57 Headlamp Driver Module 58 Body Controller 1 59 Electric Adjustable Pedals 61 Vehicle Stability Enhancement System 62 Regulated Voltage Control 63 Air Solenoid 64 Air Pump
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Assignment of the relays in the Under-hood Fuse Box (2009)
Fuse Data
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No. Description 37 Headlamp Wiper 38 Rear Window Wiper/Washer 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Washer 43 High-Beam Headlamp 44 Air Conditioning 46 Headlamp Driver Module 47 Starter 49 Electric Adjustable Pedal 60 Powertrain 69 Air Solenoid
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Assignment of the Miscellaneous fuses in the Under-hood Fuse Box (2009)
Fuse Data
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No. Description 48 Instrument Panel Battery
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Assignment of the fuses in the Under-hood Fuse Box, V8 engine (2003, 2004)
Fuse Data
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No. Description 1 Electrically-Controlled Air Suspension 2 Passenger’s Side High-Beam Headlamp 3 Passenger’s Side Low-Beam Headlamp 4 Back-Up-Trailer Lamps 5 Driver’s Side High-Beam Headlamp 6 Driver’s Side Low-Beam Headlamp 7 Rear Window Washer, Headlamp Washer 8 Automatic Transfer Case 9 Windshield Washer 10 Powertrain Control Module B 11 Fog Lamps 12 Stop Lamp 13 Cigarette Lighter 14 Ignition Coils 15 Canister Vent 16 TBC-Ignition 1 17 Crank 18 Air Bag 19 Trailer Electric Brake 20 Cooling Fan 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Driver Information Center 25 Automatic Shift Lock Control System 26 2003: Engine 1 27 2003: Backup 28 Powertrain Control Module 1 30 Air Conditioning 31 Truck Body Controller 32 Trailer 33 Anti-Lock Brakes (ABS) 34 Ignition A 35 Blower Motor 36 Ignition B 50 Passenger’s Side Trailer Turn 51 Driver’s Side Trailer Turn 52 Hazard Flashers 53 Oxygen Sensor Bank B 54 Oxygen Sensor Bank A 55 Injector Bank A 56 Injector Bank B 57 Electric Adjustable Pedal
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Assignment of the relays in the Under-hood Fuse Box, V8 engine (2003, 2004)
Fuse Data
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No. Description 37 Headlamp Washer 38 Rear Window Washer 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Washer 43 High-Beam Headlamp 44 Air Conditioning 45 Cooling Fan 46 Headlamp Driver Module 47 Starter 49 Electric Adjustable Pedal 58 Ignition 1
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Assignment of the miscellaneous fuse in the Under-hood Fuse Box, V8 engine (2003, 2004)
Fuse Data
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No. Description 48 Instrument Panel Battery
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Assignment of the fuses in the Under-hood Fuse Box, V8 engine (2005-2008)
Fuse Data
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No. Description 1 Electrically-Controlled Air Suspension 2 Passenger Side High-Beam Headlamp 3 Passenger Side Low-Beam Headlamp 4 Back-Up-Trailer Lamps 5 Driver Side High-Beam Headlamp 6 Driver Side Low-Beam Headlamp 7 2005-2006: Rear Window Washer, HeadlampWasher 8 Automatic Transfer Case 9 Windshield Washer 10 Powertrain Control Module B 11 Fog Lamps 12 Stoplamp 13 Cigarette Lighter 14 Ignition Coils 15 2005-2006: Canister Vent 16 Truck Body Controller, Ignition 1 17 Crank 18 Airbag 19 Trailer Electric Brake 20 Cooling Fan 21 Horn 22 Ignition E 23 Electronic Throttle Control 24 Instrument Panel Cluster, Driver Information Center 25 Automatic Shift Lock Control System 26 Engine 1 27 Backup 28 Powertrain Control Module 1 29 Powertrain Control Module 30 Air Conditioning 31 Injector Bank A 32 Trailer 33 Antilock Brakes (ABS) 34 Ignition A 35 Blower Motor 36 Ignition B 50 Passenger Side Trailer Turn 51 Driver Side Trailer Turn 52 Hazard Flashers 53 Transmission 54 Oxygen Sensor Bank B 55 Oxygen Sensor Bank A 56 Injector Bank B 57 Headlamp Driver Module 58 Body Controller 1 59 Electric Adjustable Pedal 61 Vehicle Stability Enhancement System (StabiliTrak)
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Assignment of the relays in the Under-hood Fuse Box, V8 engine (2005-2008)
Fuse Data
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No. Description 37 Headlamp Washer 38 Rear Window Wiper 39 Fog Lamps 40 Horn 41 Fuel Pump 42 Windshield Washer 43 High-Beam Headlamp 44 Air Conditioning 45 Cooling Fan 46 Headlamp Driver Module 47 Starter 49 Electric Adjustable Pedal 60 Powertrain
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Assignment of the miscellaneous fuse in the Under-hood Fuse Box, V8 engine (2005-2008)
Fuse Data
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No. Description 48 Instrument Panel Battery
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It is located under of the left rear seat, under two covers.
Fuse Data
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Assignment of the fuses in the Rear Under-seat Box (Trailblazer, 2002-2009)
Fuse Data
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№ Usage 01 Passenger Door Control Module 02 Driver Door Control Module 03 Liftgate Module 2 04 Truck Body Controller 3 05 Rear Fog Lamps 06 2002-2003: Liftgate Module/Driver Seat 07 Truck Body Controller 2 08 Power Seats 09 2002-2003: Blank 10 Driver Door Module 11 Amplifer 12 Passenger Door Module 13 Rear Climate Controls 14 Driver Side Rear Parking Lamps 15 2002-2003: Auxiliarv Power 2 16 Vehicle Center High-Mounted Stoplamp (CHMSL) 17 Passenger Side Rear Parking Lamps 18 Locks 19 2002-2003: Blank 20 2002-2004: Sunroof 21 Lock 23 Blank 24 Unlock 25 Blank 26 Blank 27 OnStar Overhead Battery, OnStar System 28 2002-2004: Blank 29 Not Used 30 Parking Lamps 31 Truck Body Controller Accessory 32 Truck Body Controller 5 33 Front Wipers 34 Vehicle Stop 35 2002-2004: Blank 36 Heat Ventilation Air Conditioning B 37 Front Parking Lamps 38 Driver Side Turn Signal 39 Heat Ventilation Air Conditioning 1 40 Truck Body Controller 4 41 Radio 42 Trailer Park 43 Passenger Side Turn Signal 44 Heat Ventilation Air Conditioning 45 Rear Fog Lamps 46 Auxiliary Power 1 47 Ignition 0 48 Four-Wheel Drive 49 Blank 50 Truck Body Controller Ignition 51 Brakes 52 Truck Body Controller Run
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Fuse Data
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Assignment of the fuses in the Rear Under-seat Box (Trailblazer EXT, 2004-2006)
Fuse Data
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No. Description 01 Right Door Control Module 02 Left Door Control Module 03 Liftgate Module 2 04 Truck Body Controller 3 05 Rear Fog Lamps 06 Blank 07 Truck Body Controller 2 08 Power Seats 09 Rear Wiper 10 Driver Door Module 11 Amplifier 12 Passenger Door Module 13 Rear Climate Controls 14 Left Rear Parking Lamps 15 Blank 16 Vehicle Center High-Mounted Stop Lamp 17 Right Rear Parking Lamps 18 Locks 19 Liftgate Module/Driver Seat Module 20 Vent Window 21 Lock 22 Retained Accessory Power 23 Blank 24 Unlock 25 Blank 26 Blank 27 OnStar Overhead Battery, OnStar System 28 Sunroof 29 Rainsense Wipers 30 Parking Lamps 31 Truck Body Controller Accessory 32 Truck Body Controller 5 33 Front Wipers 34 Vehicle Stop 35 Transmission Control Module 36 Heat Ventilation Air Conditioning B 37 Front Parking Lamps 38 Left Turn Signal 39 Heat Ventilation Air Conditioning 1 40 Truck Body Controller 4 41 Radio 42 Trailer Park 43 RightTurn Signal 44 Heat Ventilation Air Conditioning 45 Rear Fog Lamps 46 Auxiliary Power 1 47 Ignition 0 48 Four-Wheel Drive 49 Blank 50 Truck Body Controller Ignition 51 Brakes 52 Truck Body Controller Run BLANK Not Used
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