2002-2009 Chevrolet Trailblazer | GMC Envoy Fuse Box Location

Vehicle: chevrolet/trailblazer   2002-2008 (1st gen)
Difficulty: ⚫⚪⚪⚪⚪
DIY Cost: $0-$5
Est. Time: 15 min

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

What you will need 

Main Fuse Box - Engine Bay

trailblazer fuse box location

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

trailblazer fuse box gmc envoy 2002 2003 2004 2005 2006

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
By YOUCANIC Automotive Experts
Nov 2020

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