Chevrolet TrailBlazer (2002-2009) Fuse Diagram

Fuse box diagram (fuse layout), location and assignment of fuses and relays:

  • Chevrolet TrailBlazer (2002-2009)
  • GMC Envoy (2002-2009)
  • Isuzu Ascender (2002-2008)
  • Buick Rainier (2004-2007)
  • Oldsmobile Bravada (2002-2004)
  • Saab 9-7X (2004-2009).

Chevrolet TrailBlazer (2002-2009)

GMC Envoy (2002-2009)

Isuzu Ascender (2002-2008)

Buick Rainier (2004-2007)

Oldsmobile Bravada (2002-2004)

Saab 9-7X (2004-2009)

Checking and Replacing Fuses

The wiring circuits in your vehicle are protected from short circuits by a combination of fuses and circuit breakers. 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.

Passenger Compartment Fuse Box Diagram

The rear underseat fuse block is located on the driver’s side of the vehicle, under the second-row seat. Pull the seat cushion forward to access the fuse block.

Passenger Compartment Fuse Box Location Passenger Compartment Fuse Box Diagram

AProtected Component
1- -
2- -
3- -
4- -
5- -
6- -
73except Saab: Body Control Module (BCM)
10Saab: Body Control Module (BCM)
810Electronic Brake Control Module (EBCM)
93except Saab: Body Control Module (BCM)
10Saab: Park/Turn Signal Lamp - LF
103Saab: Body Control Module (BCM)
1115Transfer Case Shift Control Switch, Automatic Level Control (ALC) Compressor, Front Axle Actuator
1210Transmission, Automatic Transmission Shift Lock Actuator, Engine Control Module (ECM), Powertrain Control Module (PCM), Theft Deterrent Control Module, 1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, 3-2 Shift Solenoid (3-2 SS) Valve, Torque Converter Clutch (TCC) Solenoid Valve
1320except Saab: Auxiliary Power Outlet (Front), Auxiliary Power Outlet (Console), Auxiliary Power Outlet (Rear (2005-2009))
1430except Saab: HVAC Control Module
1510Instrument Panel Cluster, Front Passenger Door Module (FPDM), Tail Lamp Assembly (Right), Marker Lamp (Right), Park/Tum Signal Lamp
1610Trailer Connector (Park Lamps)
1715Radio, Digital Radio Receiver
1810except Saab: Body Control Module (BCM)
10Saab: Park/Turn Signal Lamp - RF
1910HVAC Control Module, Turn Signal/Multifunction Switch, Air Temperature Actuators, Defrost Actuator, Recirculation Actuator, Mode Actuator, Console Mode Actuator, Traction Control Switch, Electronic Brake Control Module (EBCM),HVAC Control Module (Auxiliary), Steering Wheel Speed/Position Sensor
2010Instrument Panel Cluster, Driver Door Module (DDM), Tail Lamp Assembly (Left), Marker Lamp (Left), Park/Tum Signal Lamp
2110Turn Signal/Multifunction Switch, Marker Lamps, Front Park and Turn Signal
2210HVAC Control Module, HVAC Control Module (Auxiliary)
2310Transmission Control Module (TCM)
2415Tail Lamps, Powertrain Control Module (PCM), Throttle Actuator Control (TAC), Module Engine Control Module (ECM), Trailer Brake Wiring, Transmission Control Module (TCM)
2525Windshield Wiper Motor
26102003-2006 (except Saab): Body Control Module (BCM)
202006-2009 (except Saab): Sunroof Motor
10Saab: Body Control Module (BCM)
273except Saab: Body Control Module (BCM)
28102003-2006 (except Saab): Outside Moisture Sensor, Digital Video Disc (DVD) Player
2920Saab: Sunroof Motor
3010Garage Door Opener, Voice Recorder, Digital Video Disc (DVD) Player, Vehicle Communication Interface Module (CIM)
3120EXT (2003-2006): Sunroof Module
32- -
33- -
3410Power Door Lock ("LOCK" Relay and "UNLOCK" Relay)
35202003-2006 (except Saab): Sunroof Module
20EXT (2003-2006): Quarter Glass Switches and Actuators, Sunroof Module
36102005-2009: Cobra Intrusion Sensor Module, Inclination Sensor, Liftgate Module (LGM), Memory Seat Module - Driver
3710Right Tail Lamp Assembly, Clearance Lamps
3810Center High-Mounted Stop Lamp (CHMSL)
3910License Lamps and Left Tail Lamp
40302003-2006 (except Saab): Blower Motor (Auxiliary), Blower Motor Control Processor (Auxiliary)
41202003-2004 (except Saab): Auxiliary Power Outlet (Rear)
4220Audio Amplifier
4310Front Passenger Door Module (FPDM)
4415Rear Window Wiper Motor
4510Driver Door Module (DDM)
46102003-2004 (except Saab): Memory Seat Module (Driver), Memory Seat Module (Front Passenger), Cobra Intrusion Sensor and Inclination Sensor
4710Rear Fog Lamp
4810Body Control Module (BCM)
4930Liftgate Module
5010Body Control Module (BCM)
5120Saab: Auxiliary Power Outlet - Front/Rear
522Saab: Body Control Module (BCM)
Circuit Breaker
5130Power Seat, Memory Seat Module (Driver), Memory Seat Module (Front Passenger)
5225Power Window (Driver Door Module (DDM), Left Rear Window Switch)
5325Power Window (Front Passenger Door Module (FPDM), Right Rear Window Switch)
Relay
R1except Saab: Rear Fog Lamp
R2Park Lamps, Tail Lamps (Fuse: "16", "21", "37", "39")
R3Power Door Unlock (Rear Door Lock Actuators)
R4Power Door Lock (Rear Door Lock Actuators)
R5EXT (2003-2006): Quarter Glass Switches and Actuators, Sunroof Module
R6Saab: Ignition (Fuse: "8:, "11", "19")
R7Saab: Accessory (Fuse: "25", "23")
R8Saab: Ignition (Fuse: "12")

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Engine Compartment Fuse Box Diagram

The engine compartment fuse block is located in the engine compartment, on the passenger’s side of the vehicle.

Engine Compartment Fuse Box Location Engine Compartment Fuse Box Diagram

AProtected Component
110Evaporative Emission (EVAP) Canister Vent Solenoid, Transmission Control Module (TCM)
2102005-2009 (5.3L, 6.0L): Body Control Module (BCM), Theft Deterrent Alarm, Theft Deterrent Control Module
315Windshield Washer Fluid Pump
410High Beam Headlamps, High Beam Relay
5102005-2009 (5.3L, 6.0L): Heated Oxygen Sensor
6104.2L: Air Conditioner Relay
102005-2009 (5.3L, 6.0L): Heated Oxygen Sensor
7- -
8252003: Transfer Case Shift Control Module, Transfer Case Encoder Motor
302004-2009: Transfer Case Encoder Motor, Transfer Case Shift Control Module
9202005-2009 (5.3L, 6.0L): Fuel Injectors, Ignition Coils (Right Side)
152003-2004 (5.3L): Fuel Injectors, Ignition Coils (Right Side)
102006-2009 (4.2L): Heated Oxygen Sensor
10152003-2004 (5.3L): Fuel Injectors, Ignition Coils (Left Side)
15Evaporative Emission (EVAP) Canister Purge Solenoid, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Valve Lifter Oil Manifold (VLOM) Assembly
11155.3L, 6.0L: Throttle Actuator Control (TAC) Module - Powertrain Control Module (PCM) / Engine Control Module (ECM)
12102003-2004: Body Control Module (BCM), Theft Deterrent Alarm, Theft Deterrent Control Module
202005-2009 (5.3L, 6.0L): Fuel Injectors, Ignition Coils (Left Side)
102005-2009 (4.2L): Body Control Module (BCM), Theft Deterrent Alarm, Theft Deterrent Control Module
1310Trailer Connector (Right Turn Signal)
1430Aulomatic Level Control Compressor
1510Trailer Connector (Back-Up Lamps)
1610Trailer Connector (Left Turn Signal)
175Saab: Ignition Switch
1825Stoplamp Switch
1920Cigar Lighter, Data Link Connector (DLC)
20105.3L, 6.0L: Air Conditioner Relay
2120Fuel Pump Relay, Powertrain Control Module (PCM)
2215Electronic Adjustable Pedals (EAP) Relay
2310Right High-Beam Headlamp
2410Left High-Beam Headlamp
2510Powertrain Control Module (PCM) / Engine Control Module (ECM)
2610Stop Lamp Switch, A/T Shift Lock Actuator
2710Right Low-Beam Headlamp
2810Left Low-Beam Headlamp
2915Headlamp Driver Module (HDM) Relay
3025Turn Signal/Hazard Flasher Module
3110Body Control Module (BCM)
3210Inflatable Restraint Front Passenger Pressure System (PPS) Module, Inflatable Restraint Sensing and Diagnostic Module (SDM), Rollover Sensor
33102003-2008: Engine Cooling Fan (Fan Driver Module)
3410Ignition Relay No.1, Air Conditioner Relay, Park/Neutral Position (PNP) Switch, Headlamp Leveling Actuators, Inverting Driver Module, Stop Lamp Switch, Traction Control Switch, Headlamp Leveling Switch, Instrument Panel Cluster, Turn Signal/Multifunction Switch, Inside Rearview Mirror
35102003: EVAP Canister Purge Solenoid, EVAP Canister Vent Solenoid
152004-2009: Electronic Adjustable Pedals (EAP) Relay, Back-Up Lamps (Park/Neutral Position (PNP) Switch)
36154.2L: Powertrain Control Module (PCM) / Engine Control Module (ECM), Fuel Injectors, Ignition Coils
155.3L, 6.0L: Engine Control Module (ECM)
37152004-2008 (4.2L): Secondary Air Injection (AIR) Pump Relay, Secondary Air Injection (AIR) Pump, Secondary Air Injection (AIR) Solenoid
38104.2L: Powertrain Control Module (PCM), Throttle Actuator Control (TAC) Module
152003-2004 (5.3L): Heated Oxygen Sensors
152009: Secondary Air Injection (AIR) Pump Relay
39152003: Back-Up Lamps (Park/Neutral Position (PNP) Switch)
102004-2005: EVAP Canister Purge Solenoid, EVAP Canister Vent Solenoid
40102003-2005 (4.2L): Heated Oxygen Sensors
152003-2004 (5.3L): Heated Oxygen Sensors
152005-2009 (5.3L, 6.0L): 1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, 3-2 Shift Solenoid (2-3 SS) Valve, Torque Converter Clutch (TCC) Solenoid Valve, Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve, Transmission Control Module (TCM)
4120Headlamp Washer Relay, Rear Window Wiper Motor Relay
4215Front Fog Lamp Relay
4330Trailer Brake Wiring
4415Horn Relay
4510Instrument Panel Cluster (IPC)
46102005-2009 (5.3L, 6.0L): Engine Control Module (ECM)
47152005-2009: Regulated Voltage Control
48152009: Engine Control Module (ECM)
4930Trailer Connector
5060ABS - Electronic Brake Control Module (EBCM)
51604.2L: Secondary Air Injection (AIR) Pump Relay
52602006-2009: Vehicle Stability Enhancement System (VSES) - Electronic Brake Control Module (EBCM)
53- -
54- -
55402006-2009: Blower Motor Control Module, Blower Motor Resistor Assembly
5640Starter Relay, Ignition Switch
57- -
58402003-2005: Blower Motor Resistor Assembly (HVAC Manual), Blower Motor Control Processor (HVAC Auto)
5940Ignition Switch
60- -
61- -
62125Fuse Block (Passenger Compartment)
63152009: Evaporative Emission (EVAP) Canister Purge Solenoid, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Valve Lifter Oil Manifold (VLOM) Assembly
64152009 (Saab): Evaporative Emission (EVAP) Canister Purge Solenoid, Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
Relay
R1Windshield Washer Fluid Pump
R2High Beam Headlamps
R32003-2004 (5.3L): Ignition (Fuse: "5", "10", "11")
2005-2009: Powertrain Control Module (PCM) / Engine Control Module (ECM)
R44.2L: Air Conditioner
2009: Secondary Air Injection (AIR) Pump
R5 -
R6Starter
R75.3L, 6.0L: Air Conditioner
R8Fuel Pump
R9Electronic Adjustable Pedals (EAP)
R10Engine Cooling Fan
R11Headlamp Driver Module (Low Beam Headlamps)
R12 -
R13Headlamp Washer System
R14Rear Window Washer Fluid Pump
R15Front Fog Lamp
R16Horn