This guide shows 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 – Engine Bay
The main fuse block is located in the engine bay. Open the hood and look on the driver’s side. You will see the fuse box. Remove the fuse box cover to access the fuses underneath.
Mini Fuses
- 1 ECAS
- 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 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 Side Trailer TRN
- 51 Driver 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.
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
Trying to fix a problem on your Chevrolet Trailblazer? Check out our guide on how to Diagnose Vehicle Problems Like a Pro.
The drivers side door panel the window or door lock controls will not work so were do I need to look first to see what’s wrong
Bad flasher module more than likely.
I am trying to add an FM modulator to my envoy. I can’t find anywhere to connect to a 12v switched power source. Everything I test is I switched. Help?
Check the fuel pressure regulator vacuum hose to see if its wet with fuel or has the odor of fuel.If either condition is present, the fpr is bad.You should also check the regulator itself to see if fuel is steadily seeping out of the regulator vacuum port,with the vacuum hose disconnected from it while a assistant turns/cranks the engine with the key.The fpr is bad if fuel is coming out of that port.If the fpr is ok, check for a stuck open injector.If theres so much fuel getting dumped into the engine that raw fuel is making its way out of the tailpipes,its gonna flood the engine and prevent it from starting.When this condition occurs,use the following (clear flooded engine mode) procedure to see if the engine will start.
*Hold the gas pedal to the floor while you crank the engine.This will trigger the ecu to shut injector pulse off and that,plus the throttle blade being fully open,will allow additional air to enter the engine to help clear out the excess fuel & that should allow the engine to start.If your vehicle has a carbon canister,purge valve & vent valve for the EVAP system and the vent valve (on top of the fuel tank) is defective,allowing liquid fuel to be drawn into the canister then the engine,this will also cause an engine flood condition.A bad ect sensor can cause so much of a rich condition that the engine wont start.Press the gas pedal down 1/4-1/3 of the way during crank mode and if it starts,the ect sensor is bad.
Got 06 trailblazer I cranked it had ac on rolled up driver window and vehicle went dead and now will not start
I have all dashlights work but not starter and now windows and doors locks don’t work either
Has plenty power just won’t turn over
Any suggestions
I just got a 2008 trail blazer can some one tell me where are the fuses for cig lighters onl y 1 is working in front and none in the back . And why my stability track lights keep coming on the one for service and one saying it’s not properly working. Had it to shop and said it was fine. Thanks so much
I just got a 2008 trail blazer can some one tell me where are the fuses for cig lighters onl y 1 is working in front and none in the back . And why my stability track lights keep coming on the one for service and one saying it’s not properly working. Had it to shop and said it was fine. Thanks so much
Can anyone help me locate the fuse (#) that controls the a/c compressor? I just installed a high output 2-speed electric fan on my 2004 Trailblazer LS 4.2L after replacing my water pump and removed fan and shroud.
The relay I’m using to control the low and high speeds needs to kick into high speed when I turn the a/c on, otherwise the low speed is running once operating temp reached. I have blade fuse attachments connected to fuse #30 for the a/c.
Is there a better option?
Thanks
Can anyone tell me where the interior lights fuse is located and what it looks like
On my 2004 Chevy trailblazer ext Lt is it ok to run it with out soild state relay 44-fan?
Fuse # for running lights?