Fuse Box Location 2002-2009 Chevrolet Trailblazer | GMC Envoy

Fuse Box Location 2002-2009 Chevrolet Trailblazer | GMC Envoy

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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Gary Jones made a comment.
2 years 4 months ago

This has been very helpful. Thanks for putting this together.

 
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Mike made a comment.
2 years 4 months ago

Rear comfort controls do not work same with radio. Is there 1 fuse or 2 ? Location please.

 
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Arles made a comment.
2 years 2 months ago

Thanks very much

 
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KC made a comment.
2 years 1 month ago

You are the "man" thanks for this information

 
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Billy made a comment.
2 years 1 month ago

Whats the key name for my car radio fuse on a 2002 chevy trailblazer

 
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Jeff's Automotive made a comment.
2 years 1 month ago

Check fuse 41 in the rear fuse box.

 
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Kyle made a comment.
2 years 1 month ago

Front heater control cluster stopped working, ideas?

 
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Debbie made a comment.
2 years 1 month ago

trying to find the replacement interior fuse for #8 seats

 
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Eric Wolford made a comment.
2 years ago

Okay...rained hard in my driver window last night...this morning, none of the controls work on driver door, including mirror. Passenger works. I pulled the 25 relay under the seat and swapped it, still nothing...is there another fuse I'm missing somewhere?

 
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Daycord made a comment.
1 year 11 months ago

Same thing happened to mine Eric. The rained slips thru the creases in between buttons on your master control window switch. Your going to have to replace eventually, but in the meantime you can switch your passenger side window control lock to your driver side. Found this video on youtube. Good Luck.
https://www.youtube.com/watch?v=RBNCyioHsR8

 
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Visitor made a comment.
2 years ago

When I turn my left signal on the hazards go on and the right signal works when it wants to. What fuses should I look at?

 
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Visitor made a comment.
1 year 11 months ago

Bad flasher bleeding over

 
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Visitor made a comment.
1 year 11 months ago

we replaced the DDM and the power windows still don't work. This has been an issue since we replaced the battery. Any advice???

 
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A/C Heater Blower Issue made a comment.
1 year 11 months ago

Here's a good one for you. We went to the dealer for an oil change today, started the car and turned the A/C on....worked for 5 seconds then stopped. I've checked Engine fuses: #35 along with J-case #44 and both seem fine. I've checked Interior fuses: #36, #39, & #44 along with J-Case: #35 & #44, all of these seem fine. When I turn the dial to anywhere from off to 5 and I can feel the A/C start but nothing coming out of the dash. Do you think the Blower Motor just gave up? There was no indication it was going bad.

 
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zeus made a comment.
1 year 10 months ago

Had the same problem, problem was with the wiring harness to the blower motor. The plug connection had melted and destroyed the contacts. solution was to replace the wiring harness and plug. very common problem in trailblazer. https://www.youtube.com/watch?v=M4pka5BMoQE

 
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danielle made a comment.
1 year 10 months ago

which fuse is for the backlight of the license plate for a 2005 trailblazer

 
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Visitor made a comment.
1 year 9 months ago

I think I need to replace the fuse for the power seat in my 2008 Chevy Trailblazer. Can someone please tell me what kind of fuse it is I need? It's not one of the mini fuses from what I've been told and that's all that comes up for part replacements. I was told it's one of the bigger silver fuses. Help please!!!

 
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Rick made a comment.
1 year 9 months ago

All my dash lights are out in the instrument cluster. Where is the fuse/relay located in the 2007 GMC Envoy Denali???

 
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Cynthia williams made a comment.
1 year 9 months ago

I have a 2003 GMC envoy an none of my gauges work on my Dash it's saying that it's an unknown driver none of my windows or my locks my Clicker when I take out one of the fuses everything works but I can't start my car and as soon as I put it back in it stops working

 
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sharrall made a comment.
1 year 8 months ago

my headlight do not work, I have changed them twice. any advise on what I need to do to get them to work 2007 chevy trailblazer ls

 
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sharrall made a comment.
1 year 8 months ago

my headlight do not work, I have changed them twice. any advise on what I need to do to get them to work 2007 chevy trailblazer ls

 
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MBFanatic made a comment.
1 year 8 months ago

First check the fuse. If the fuse is in good condition the issue is either the headlight switch or a broken wire to the headlight assembly. If you are good with a multimeter you can test both these components.

 
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juanitai28 made a comment.
1 year 7 months ago

I have a 2003 Chevy Trailblazer and I took it into a shop and got it diagnosed but they couldn't find anything. My trailblazer will shut off while driving and gauges would go all over. It would turn right back on after a few minutes. My question is, would it be a fuse and which one should I check?

 
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character99 made a comment.
1 year 6 months ago

I had a new ignition switch put in my 2002 trailblazer and ever since, my keyless entry/auto starter won't work, and if I lock the car from the door, everytime I unlock it, the car alarm goes off. From what I've read, I probably need to reset the alarm system, but I cannot find out which fuse works the alarm system. Please help. This is driving me and my neighbors crazy!

 
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Travis made a comment.
1 year 1 month ago

My 03 trailblazer 2 wheel drive it I just put a motor in and it cranks won't start . Only starts if u spray the air box . And also I have gas dripping out of my muffler ? I've checked wires grounds fuses I'm out of ideas any help work help and I've changed crank sensor cam sensor . My thoughts are bad ground s which I've checked and I've added a ground any help would help !!

 
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Visitor made a comment.
4 months 3 weeks ago

My heater control panel does not have any display so my heat doesn't work.

 
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Lknekula42 made a comment.
4 months 2 weeks ago

My third brake light doesn’t work. Was told to check fuse first before replacing whole thing. Which fuse/fuses do I need to check?

 
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Cam made a comment.
4 months 1 week ago

My key fob won't unlock or lock my 06 Chevy Trailblazer?? Any ideas I changed the battery and it still won't work

 
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Chester made a comment.
4 months ago

How is the gauge fuse listed in the fuse box

 
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Pamela anderson made a comment.
3 months 3 weeks ago

Where would the key fob in the fuse boxes

 
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Brenda made a comment.
2 months 1 week ago

There's no light to see how fast I'm going? Is that a blown fuse??

 
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Visitor made a comment.
2 months 1 week ago

Fuse # for running lights?

 
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Visitor made a comment.
1 month 1 week ago

On my 2004 Chevy trailblazer ext Lt is it ok to run it with out soild state relay 44-fan?

 

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