Fuse Box Location 2002-2009 Chevrolet Trailblazer | GMC Envoy

Last Updated on Friday May 18, 2018

This guide will show you the location of the fuse box on your Chevrolet Trailblazer / GMC Envoy. At the end of the article, you can also see a complete list of fuse assignments.

Make: Chevrolet, GMC
Model: Trailblazer, Envoy
Years: 2002 2003 2004 2005 2006 2007 2008 2009
Difficulty: Easy

Main Fuse Box Location Engine


The main fuse block is located in the engine bay. Open the hood and look on the drivers side. You will see the fuse box. Remove the fuse box cover to access the fuses underneath.

trailblazer fuse box location

Mini Fuses 
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

J-Case Fuses Usage

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

Solid State Relays
45 Cooling Fan
46 HDM

Mini Relay Usage

47 Starter
Miscellaneous Usage
48 Instrument Panel Battery
49 Fuse Puller

Rear Underseat Fuse Block


The interior fuses are located under the rear seat on the driver?s side. To access the fuses under the rear seat start by tilting the rear seat forward. Remove the cover and underneath you will see the fuses.

trailblazer fuse box gmc envoy 2002 2003 2004 2005 2006

Fuse 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 TBC5
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

J-Case Fuses Usage
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
Solid State Relays
45 Cooling Fan
46 HDM

Mini Relay Usage
47 Starter
Miscellaneous Usage
48 Instrument Panel Battery
49 Fuse Puller

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