Page Contents:
In this article, you will find information about the fuses of the Chevrolet TrailBlazer (models 2002, 2003, 2004, and 2005), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Chevy TrailBlazer
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.
Caution!
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire.
Location of Fuse Boxes
Rear Underseat Fuse Block:
The rear underseat fuse block is located under the rear seat on the driver’s side of the vehicle.
Engine Compartment Fuse Block:
The fuse block is located under the hood in the engine compartment on the driver’s side of the vehicle. Remove the primary cover by pressing the two locking tabs. Remove the secondary cover by snapping off while lifting. To reinstall the fuse panel cover, reverse the sequence.
Fuse Box Diagrams
2002
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2002)№ | Usage |
---|---|
01 | Right Door Control Module |
02 | Left Door Control Module |
03 | LGM 2 |
04 | TBC 3 |
05 | Rear Fog Lamps |
06 | LGM/DSM |
07 | TBC 2 |
08 | Power Seats |
09 | Blank |
10 | DDM |
11 | AMP |
12 | PDM |
13 | Rear Climate Controls |
14 | Left Rear Parking Lamps |
15 | Auxiliary Power 2 |
16 | VEH CHMSL |
17 | Right Rear Parking Lamps |
18 | LOCKS |
19 | Blank |
20 | Sunroof |
21 | LOCK |
23 | Blank |
24 | UNLOCK |
25 | Blank |
26 | Blank |
27 | OH Battery / OnStar System |
29 | Rainsense Wipers |
30 | Parking Lamps |
31 | TBC 4CC |
32 | TBC 5 |
33 | Front Wipers |
34 | VEH STOP |
35 | Blank |
36 | HVAC B |
37 | Front Parking Lamps |
38 | Left Turn Signal |
39 | HVAC 1 |
40 | TBC 4 |
41 | Radio |
42 | TR PARK |
43 | Right Turn Signal |
44 | HVAC |
45 | Rear Fog Lamps |
46 | Auxiliary Power 1 |
47 | Ignition 0 |
48 | Four-Wheel Drive |
49 | Blank |
50 | TBC IG |
51 | Brakes |
52 | TBC RUN |
Engine Compartment Fuse Block
List of fuses in the Engine Compartment Fuse Block (2002)№ | Usage |
---|---|
1 | ECAS |
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 | WASH |
8 | ATC |
9 | Windshield Wipers |
10 | Powertrain Control Module B |
11 | Fog Lamps |
12 | ST/LP |
13 | Cigarette Lighter |
14 | COILS |
15 | RIDE |
16 | TBD - Ignition 1 |
17 | Crank |
18 | Air Bag |
19 | ELEK Brake |
20 | Cooling Fan |
21 | Horn |
22 | Ignition E |
23 | ETC |
24 | Instrument Panel Cluster, Driver Information Center |
25 | Automatic Shift Lock Control System |
26 | ENG 1 |
27 | Back-Up |
28 | Powertrain Control Module 1 |
29 | Oxygen Sensor |
30 | Air Conditioning |
31 | TBC |
50 | Passenger’s Side Trailer TRN |
51 | Driver’s Side Trailer TRN |
52 | Hazard Flashers |
32 | Trailer |
33 | Anti-Lock Brakes (ABS) |
34 | Ignition A |
35 | Blower Motor |
36 | Ignition B |
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 | HDM |
47 | Starter |
48 | Instrument Panel Battery |
49 | Fuse Puller |
2003
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2003)№ | Usage |
---|---|
01 | Right Door Control Module |
02 | Left Door Control Module |
03 | Liftgate Module 2 |
04 | Truck Body Controller 3 |
05 | Rear Fog Lamps |
06 | Liftgate Module / Driver Seat Module |
07 | Truck Body Controller 2 |
08 | Power Seats |
09 | Blank |
10 | Driver Door Module |
11 | Amplifier |
12 | Passenger Door Module |
13 | Rear Climate Controls |
14 | Left Rear Parking Lamps |
15 | Auxiliary Power 2 |
16 | Vehicle Center High-Mounted Stop Lamp |
17 | Right Rear Parking Lamps |
18 | Locks |
19 | Blank |
20 | Sunroof |
21 | Lock |
23 | Blank |
24 | Unlock |
25 | Blank |
26 | Blank |
27 | OH Battery / OnStar System |
29 | Rainsense Wipers |
30 | Parking Lamps |
31 | Truck Body Controller 4 Cruise Control |
32 | Truck Body Controller 5 |
33 | Front Wipers |
34 | Vehicle Stop |
35 | Blank |
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 | Right 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 |
Engine Compartment Fuse Block
L6 Engine
List of fuses in the Engine Compartment Fuse Block (L6) (2003)№ | Usage |
---|---|
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 | Wash |
8 | Automatic Transfer Case |
9 | 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, Driver Information Center |
25 | Automatic Shift Lock Control System |
26 | Engine 1 |
27 | Back-Up |
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 |
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 Module |
47 | Starter |
48 | Instrument Panel Battery |
49 | Blank |
V8 Engine
List of fuses in the Engine Compartment Fuse Block (V8) (2003)№ | Usage |
---|---|
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 | Wash |
8 | Automatic Transfer Case |
9 | Windshield Wipers |
10 | Powertrain Control Module B |
11 | Fog Lamps |
12 | Stop Lamp |
13 | Cigarette Lighter |
14 | Ignition Coils |
15 | Canister Vent |
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, Driver Information Center |
25 | Automatic Shift Lock Control System |
26 | Engine 1 |
27 | Back-Up |
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 A |
54 | Oxygen Sensor Bank B |
55 | Injector Bank A |
56 | Injector Bank B |
37 | Headlamp Washer |
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 Module |
47 | Starter |
58 | Ignition 1 |
48 | Instrument Panel Battery |
2004
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2004)№ | Usage |
---|---|
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 | Sunroof |
21 | Lock |
23 | Blank |
24 | Unlock |
25 | Blank |
26 | Blank |
27 | OH Battery / OnStar System |
29 | Rainsense Wipers |
30 | Parking Lamps |
31 | Truck Body Controller Accessory |
32 | Truck Body Controller 5 |
33 | Front Wipers |
34 | Vehicle Stop |
35 | Blank |
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 | Right 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 |
Engine Compartment Fuse Block
L6 Engine
List of fuses in the Engine Compartment Fuse Block (L6) (2004)№ | Usage |
---|---|
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 | Blank |
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 | Backup |
27 | 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 | Electric Adjustable Pedal |
54 | A.I.R. Solenoid |
56 | A.I.R. Pump |
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 | A.I.R. Solenoid |
48 | Instrument Panel Battery |
49 | Blank |
V8 Engine
List of fuses in the Engine Compartment Fuse Block (V8) (2004)№ | Usage |
---|---|
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 | Backup |
27 | Engine 1 |
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 |
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 |
48 | Instrument Panel Battery |
2005
Rear Underseat Fuse Block
List of fuses in the Rear Underseat Fuse Block (2005)№ | Usage |
---|---|
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 | Blank |
21 | Lock |
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 | Right 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 |
Engine Compartment Fuse Block
L6 Engine
List of fuses in the Engine Compartment Fuse Block (L6) (2005)№ | Usage |
---|---|
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 | 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 | Engine 1 |
27 | Backup |
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 | Headlamp Driver Module |
54 | Air Injection Reactor (AIR) Solenoid |
56 | Air Injection Reactor (AIR) Pump |
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 |
48 | Instrument Panel Battery |
V8 Engine
List of fuses in the Engine Compartment Fuse Block (V8) (2005)№ | Usage |
---|---|
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 | 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 | 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 | 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 |
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 |
60 | Powertrain |
48 | Instrument Panel Battery |