Explore Chevrolet Express fuse box diagrams in this detailed guide that explains the electrical layout of the long-running full-size van. In this article, we consider the second-generation Chevrolet Express, produced from 2003 to 2019 , and provide fuse box diagrams for Chevrolet (Chevy) Express 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 and 2026 , along with information about the location of the fuse panels and the assignment of each fuse and relay (fuse layout).
It is located under the driver’s seat.
It is located on the driver’s side of the engine compartment.
Assignment of the fuses in the Floor Console Fuse Box (2003-2007)
Fuse Data
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No. Description 1 Spare 2 Outside Rear View Mirror 3 Courtesy Lamp/SEO 4 Left Rear Stop/Turn Signal 5 Cargo Locks 6 Right Rear Stop/Turn Signal 7 Driver Locks 8 Stop/Center High Mounted Stop Lamp 9 Climate Control 1 10 Climate Control 11 Brakes 12 Heated Mirror/Defogger 13 Right Rear Blower 14 Driver Turn Mirror 15 Door Locks 16 Upfitter Park 17 Not Available 18 Left Rear Park Lamp 19 Pass Turn Mirror 20 Right Rear Park Lamp 21 Trailer Park Lamp 22 Front Park Lamp 32 Auxilary 1 33 Auxilary 2
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Assignment of the relays in the Floor Console Fuse Box (2003-2007)
Fuse Data
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No. Description 23 Window Residual Accessory Power 24 Auxiliary 25 Right Rear Defogger 26 Courtesy Lamp 27 Cargo Unlock 28 Driver Unlock 29 Park Lamp 30 Door Locks 31 Passenger Unlock
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Assignment of the circuit breakers in the Floor Console Fuse Box (2003-2007)
Fuse Data
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No. Description 34 Power Window
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Assignment of the fuses in the Engine Compartment (2003-2007)
Fuse Data
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No. Description 1 Radio Battery 2 Gasoline: Powertrain Control Module Battery 3 Left Rear Turn Lamp 4 Right Rear Turn Lamp 5 Backup Lamps Trailer Wiring 6 Ignition 0 7 Stop Lamp 8 Right Rear Defogger/Heated Mirror 9 Right Daytime Running Lamp/Turn Signal 10 Left Daytime Running Lamp/Turn Signal 11 Truck Body Control Module 4 12 Fuel Pump 13 Trailer 14 Hazard Flashers 15 Horn 16 Truck Body Control Module 3 17 Trailer Stop/Turn Signal 18 Truck Body Control Module 2 19 Truck Body Control Module 20 Remote Function Actuator 21 Gasoline: Engine 2 22 Ignition E 23 Engine 1 24 Truck Body Control Module Ignition 1 25 Gasoline: Spare 26 Inside Rearview Mirror 27 Crankcase 28 Brake Transmission Shift Interlock System 29 Auxiliary Power Outlets 30 Cigarette Lighter 31 Instrument Panel Cluster 32 Air Conditioning 33 Gasoline: Spare 34 Gasoline: Canister Vent Solenoid 35 Spare 36 Brake Transmission Shift Interlock, Vehicle Back-Up 37 Airbag 38 Gasoline: Powertrain Control Module Ignition 1 39 Gasoline: Oxygen Sensor B 40 Oxygen Sensor A 41 Windshield Wipers 42 Right Headlamp – Low Beam 43 Left Headlamp – Low Beam 44 Left Headlamp – High Beam 45 Right Headlamp – High Beam 46 Gasoline: Truck Body Controller- Accessory 47 Front Windshield Wiper 48 Anti-lock Brakes, Vehicle Stability Enhancement System 49 Ignition A 50 Trailer 51 Climate Control Blower 52 Ignition B 63 Gasoline: Spare 64 Spare
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Assignment of the relays in the Engine Compartment (2003-2007)
Fuse Data
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No./Short-Codes Description 53 Windshield Wiper 54 Air Conditioning 55 Gasoline: Spare 56 Headlamp – High Beam 57 Fuel Pump 58 Headlamp – Low Beam 59 Horn 62 / Gasoline: Spare 61 / STRTR Starter
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Assignment of the circuit breakers in the Engine Compartment (2003-2007)
Fuse Data
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No./Short-Codes Description 60 / 2003-2005: Power Window (#60)
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Assignment of the fuses and relay in the Floor Console Fuse Box (2008, 2009)
Fuse Data
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No. Description 1 Climate Control 2 (HVAC) 2 Compass 3 Ignition Switch, Theft Deterrent System Module (PK3) 4 Upfitter Courtesy Lamps 5 Climate Control 1 (HVAC) 6 Empty 7 Instrument Panel Cluster 8 Audio System, Chime 9 Auxiliary Park Lamp 10 Auxiliary Trailer Back-up Lamps 11 Remote Function Actuator, Tire Pressure Monitor (TPM) 12 Climate Control (HVAC) Controls 13 Trailer Park Lamps 14 Front Park Lamps 15 Taillamps, Back-up Lamps 16 Empty 17 Steering Wheel Sensor 18 Outside Rearview Mirror Switch 19 Empty 20 Empty 21 Rear Defogger 22 Outside Rearview Mirror Heater 23 Empty 24 Empty 25 Cargo Door Unlock 26 Rear Door Lock 27 Front Door Lock 28 Rear Passenger Door Unlock 29 Upfitter Park Lamps 30 Front Passenger Door Unlock 31 Driver Door Unlock 32 Airbag System, Automatic Occupant Sensing (AOS) System 33 Right Rear Park Lamp 34 Left Rear Park Lamp 35 Upfitter Auxiliary 2 (J-Case) 36 Upfitter Auxiliary 1 (J-Case) 37 Rear Blower (J-Case) 38 Empty (J-Case) 39 Run (High Current Micro) 40 Park Lamps (High Current Micro) 41 Empty (Mini Micro) 42 Upfitter Auxiliary 2 (High Current ISO Relay) 43 Retained Accessory Power (RAP) (High Current Micro) 44 Rear Defogger (High Current Micro)
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Assignment of the circuit breakers in the Floor Console Fuse Box (2008, 2009)
Fuse Data
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No. Description 45 Power Window 46 Power Seats
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Assignment of the fuses in the Engine Compartment (2008, 2009)
Fuse Data
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No. Description 1 Left High-Beam Headlamp 2 Fuel Pump 3 Empty 4 Diesel: Fuel Heater 5 Right High-Beam Headlamp 6 Empty 7 Left Low-Beam Headlamp 8 Right Stoplamp, Trailer Turn Signal 9 Right Low-Beam Headlamp 10 Daytime Running Lamps 2 (DRL) 11 Gasoline: Fuel System Control Module Ignition 12 Daytime Running Lamps 1 (DRL) 13 Auxiliary Stoplamp 14 Diesel: Fuel Operated Heater Module 15 Gasoline: Fuel System Control Module Battery 16 Left Stoplamp, Trailer Turn Signal 17 Gasoline: Canister Vent Solenoid 18 Empty 19 Empty 20 Body Control Module 1 21 Special Equipment Option (SEO) 22 Body Control Module 4 23 Body Control Module 6 24 Empty 25 Body Control Module 7 26 Body Control Module 3 27 Body Control Module 5 28 Empty 29 Empty 30 Instrument Panel Cluster 31 Empty 32 Brake Switch 33 Auxiliary Power Outlet 34 Airbag 35 Trailer Wiring 36 Gasoline: Steering Wheel Sensor 37 Body Control Module 2 38 Cigarette Lighter, Data Link Controller 39 Windshield Wiper 40 Empty 41 Windshield Washer 42 Empty 43 Horn 44 Transmission Control Module Battery 45 Empty 46 Gasoline: Oxygen Sensor 1 47 Transmission Control Module Ignition 48 Engine Control Module Ignition 49 Mass Airflow Sensor, Canister Vent 50 Engine Control Module, Powertrain 51 Transmission 52 Gasoline: Even Ignition Injectors 53 Diesel: Glow Plug Module 54 Engine Control Module Battery 55 Gasoline: Odd Ignition Injectors 56 Gasoline: Oxygen Sensor 2 57 Air Conditioning Compressor 58 Diesel: Fan Clutch 59 Gasoline: V6 Fuel Injectors 60 Antilock Brake System Module (J-Case) 61 Antilock Brake System Motor (J-Case) 62 Trailer Wiring (J-Case) 63 Empty 64 Starter Solenoid (J-Case) 65 Diesel: Engine Control Module (ECM), Powertrain (J-Case) 66 Front Blower (J-Case) 67 Empty 77 Body BEC (Mega Fuse)
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Assignment of the relays in the Engine Compartment (2008, 2009)
Fuse Data
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No. Description 68 Empty 69 Run, Crank (High Current Micro) 70 Windshield Wiper High (High Current Micro) 71 Windshield Wiper (High Current Micro) 72 Fuel Pump (Mini Micro) 73 Crank (High Current Micro) 74 Air Conditioning Compressor (Mini Micro) 75 Fan Clutch (Solid State) 76 Powertrain (High Current Micro)
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Assignment of the fuses in the Floor Console Fuse Box (2010-2026)
Fuse Data
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ID Description F1 — F2 Steering Wheel Sensor F3 Auxiliary Parking Lamps F4 Front Park Lamps F5 Trailer Park Lamps F6 Upfitter/Parking lamps F7 Right Rear Park Lamp F8 Left Rear Park Lamp F9 Exterior rearview mirror switch F10 Airbag/Automatic occupant sensing F11 OnStar (If Equipped) F12 Door lock/unlock control upfitter (if equipped) F13 Heating, Ventilation and Air Conditioning 2 F14 Heating, Ventilation and Air Conditioning 1 F15 2010-2019: Not Used. F16 Upfitter aux 1 / Gas ambulance F17 Exterior rearview heated mirrors F18 Rear Window Defogger F19 Compass F20 Radio/Chime/ SiriusXM satellite radio F21 Remote Function Actuator/Tire Pressure Monitor F22 Ignition Switch/Discrete Logic Ignition Sensor F23 Instrument Cluster F24 — F25 Heating, Ventilation and Air Conditioning control F26 Auxiliary/Trailer reverse lamps F27 Reverse lamps F28 Upfitter 2 / Reading lamps / Ambulance F29 Rear blower F30 Upfitter/Courtesy Lamps F31 Front Door Lock F32 Rear Door Lock F33 Cargo Door Unlock F34 Passenger Door Unlock F35 Rear Passenger Door Unlock F36 Driver Door Unlock F37 Empty F38 —
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Assignment of the relays in the Floor Console Fuse Box (2010-2026)
Fuse Data
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ID Description K1 Run (High Current Micro) K2 Empty (High Current Micro) K3 Park Lamps (High Current Micro) K4 Upfitter Auxiliary 2 (High Current Mini) K5 Rear Defogger (High Current Micro) K6 Retained Accessory Power (RAP) (High Current Micro)
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Assignment of the circuit breakers in the Floor Console Fuse Box (2010-2026)
Fuse Data
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ID Description CB1 Power Seats CB2 Power Windows
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Assignment of the fuses in the Engine Compartment (2010-2026)
Fuse Data
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No. Description 1 ABS motor 2 ABS module 3 Right trailer stoplamp/Turnlamp 4 — 5 — 6 Fuel system control module/Ignition 7 Body Control Module 5 8 Body Control Module 7 9 Body Control Module 4 10 Instrument cluster 11 Trailer Wiring 12 2010-2016, 2018-2022: Not Used 13 2010-2016: Brake Switch 14 Windshield Washer 16 Horn 17 Transmission 18 A/C 19 Engine control module battery 20 2018-2019: Cutaway/Left stoplamp/Turnlamp. 21 Left trailer stoplamp/Turnlamp 22 2018-2019: Cutaway/Right stoplamp/Turnlamp. 23 from 2021: NOX Sensor (Diesel Only) 24 Fuel Pump 25 Auxiliary Power Outlet 26 Body Control Module 3 27 Special Equipment Option 28 Airbag 29 Steering Wheel Sensor 30 Engine control module Ignition/Glow Plug Module 31 Transmission control module/Ignition 32 Transmission control module 1 battery/Engine control module battery power (gas 6 cyl) 33 2017-2026: Rear parking aid module 34 from 2021: NOX Sensor (Diesel Only) 35 2010-2017: Fuel Operated Heater Module 36 Fuel System Control Module Battery 41 from 2018: Transmission control 2 module battery power 42 Trailer wiring 43 2010-2016: Fan High 44 Starter solenoid 45 Engine control module/Powertrain 46 2010-2016: Fuel System Control Module Battery 47 Cooling fan – low 51 Left high-beam headlamp 52 Right high-beam headlamp 53 Left low-beam headlamp 54 Right low-beam headlamp 55 Wipers 56 Canister Vent Solenoid 58 Body Control Module 2 59 Body Control Module 1 61 2010-2017: Not Used 62 O2 sensor 2 / EV fan (diesel) 63 — 64 Mass Air Flow/Canister Vent 65 Ignition/Injectors – odd 66 Daytime Running Lamps 2 67 Daytime Running Lamps 1 68 Auxiliary Stop Lamps 69 2010-2016: Not Used 70 from 2018: Upfitter stoplamps 71 Fuel heater/Flex fuel sensor 72 Body Control Module 6 73 Lighter/Data Link Connection 74 Front blower 75 V6 fuel injectors / Engine control module diesel 76 from 2021: Soot Sensors (Diesel Only) 77 O2 sensor 1 78 Engine control module/Powertrain 79 Ignition/Injectors – even
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Assignment of the relays in the Engine Compartment (2010-2026)
Fuse Data
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No. Description 15 Run/Crank 37 from 2021: NOX Sensor (Diesel Only) 38 Fuel Pump 39 Crank 40 A/C Compressor 48 2010-2016: Fan High 49 Powertrain 50 2010: Fan Clutch (EV) 57 Cooling fan – low / Not Used 60 Fan Control / Not Used
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This block is located near the fuse box in the engine compartment.
Assignment of the fuses in the auxiliary fuse block (2018-2026)
Fuse Data
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ID Description MR-1 Upfitter 1 MR-2 Upfitter 2 MR-3 Upfitter power control
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Assignment of the relays in the auxiliary fuse block (2018-2026)
Fuse Data
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ID Description MR Rel 1 Upfitter 1 MR Rel 2 Upfitter 1
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