Chevrolet Express (2003-2018) fuses and relays

Fuse box diagram (location and assignment of electrical fuses and relays) for Chevrolet Express (2003, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018).

Fuse Box Diagram Chevrolet Express (2003-2018)

2003, 2004, 2005, 2006, 2007
2008, 2009
2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018

Fuse box location

Floor Console Fuse Box

The fuse block is located under the driver’s seat

Engine Compartment Fuse Box

The fuse block is located on the driver’s side of the engine compartment

2003, 2004, 2005, 2006, 2007

Fuse box diagram (Floor Console Fuse Box)

Assignment of the fuses and relay in the Floor Console Fuse Box (2003-2007)
FuseUsage
1Spare
2Outside Rear View Mirror
3Courtesy Lamp/SEO
4Left Rear Stop/Turn Signal
5Cargo Locks
6Right Rear Stop/Turn Signal
7Driver Locks
8Stop/Center High Mounted Stop Lamp
9Climate Control 1
10Climate Control
11Brakes
12Heated Mirror/Defogger
13Right Rear Blower
14Driver Turn Mirror
15Door Locks
16Upfitter Park
17Not Available
18Left Rear Park Lamp
19Pass Turn Mirror
20Right Rear Park Lamp
21Trailer Park Lamp
22Front Park Lamp
32Auxilary 1
33Auxilary 2
Circuit Breaker
34Power Window
Relays
23Window Residual Accessory Power
24Auxiliary
25Right Rear Defogger
26Courtesy Lamp
27Cargo Unlock
28Driver Unlock
29Park Lamp
30Door Locks
31Passenger Unlock

Fuse box diagram (Engine Compartment Fuse Box)

Assignment of the fuses and relay in the Engine Compartment Fuse Box (2003-2007)
FuseUsage
1Radio Battery
2Gasoline: Powertrain Control Module Battery
Diesel: FOH, Engine Control Module, Transmission Control Module Battery
3Left Rear Turn Lamp
4Right Rear Turn Lamp
5Backup Lamps Trailer Wiring
6Ignition 0
7Stop Lamp
8Right Rear Defogger/Heated Mirror
9Right Daytime Running Lamp/Turn Signal
10Left Daytime Running Lamp/Turn Signal
11Truck Body Control Module 4
12Fuel Pump
13Trailer
14Hazard Flashers
15Horn
16Truck Body Control Module 3
17Trailer Stop/Turn Signal
18Truck Body Control Module 2
19Truck Body Control Module
20Remote Function Actuator
21Gasoline: Engine 2
Diesel: Spare
22Ignition E
23Engine 1
24Truck Body Control Module Ignition 1
25Gasoline: Spare
Diesel: Fuel Heater
26Inside Rearview Mirror
27Crankcase
28Brake Transmission Shift Interlock System
29Auxiliary Power Outlets
30Cigarette Lighter
31Instrument Panel Cluster
32Air Conditioning
33Gasoline: Spare
Diesel: Engine Control Module
34Gasoline: Canister Vent Solenoid
Diesel: Rear Fog Lamps
35Spare
36Brake Transmission Shift Interlock, Vehicle Back-Up
37Airbag
38Gasoline: Powertrain Control Module Ignition 1
Diesel: Engine Control Module, Transmission Control Module, Glow Plug Control Module Ignition 1
39Gasoline: Oxygen Sensor B
Diesel: Spare
40Oxygen Sensor A
41Windshield Wipers
42Right Headlamp – Low Beam
43Left Headlamp – Low Beam
44Left Headlamp – High Beam
45Right Headlamp – High Beam
46Gasoline: Truck Body Controller- Accessory
Diesel: Truck Body Controller, Transmission Control Module Accessory
47Front Windshield Wiper
48Anti-lock Brakes, Vehicle Stability Enhancement System
49Ignition A
50Trailer
51Climate Control Blower
52Ignition B
63Gasoline: Spare
Diesel: Engine Control Module Actuator
64Spare
Relays
53Windshield Wiper
54Air Conditioning
55Gasoline: Spare
Diesel: Rear Fog Lamps
56Headlamp – High Beam
57Fuel Pump
58Headlamp – Low Beam
59Horn
62 /
SPARE (G), ECM (D)
Gasoline: Spare
Diesel: Engine Control Module
61 / STRTRStarter
Circuit Breaker
60 /
PWR SEAT
2003-2005: Power Window (#60)
2006-2007: Power Seat

2008, 2009

Fuse box diagram (Floor Console Fuse Box)

Assignment of the fuses and relay in the Floor Console Fuse Box (2008, 2009)
FuseUsage
1Climate Control 2 (HVAC)
2Compass
3Ignition Switch, Theft Deterrent System Module (PK3)
4Upfitter Courtesy Lamps
5Climate Control 1 (HVAC)
6Empty
7Instrument Panel Cluster
8Audio System, Chime
9Auxiliary Park Lamp
10Auxiliary Trailer Back-up Lamps
11Remote Function Actuator, Tire Pressure Monitor (TPM)
12Climate Control (HVAC) Controls
13Trailer Park Lamps
14Front Park Lamps
15Taillamps, Back-up Lamps
16Empty
17Steering Wheel Sensor
18Outside Rearview Mirror Switch
19Empty
20Empty
21Rear Defogger
22Outside Rearview Mirror Heater
23Empty
24Empty
25Cargo Door Unlock
26Rear Door Lock
27Front Door Lock
28Rear Passenger Door Unlock
29Upfitter Park Lamps
30Front Passenger Door Unlock
31Driver Door Unlock
32Airbag System, Automatic Occupant Sensing (AOS) System
33Right Rear Park Lamp
34Left Rear Park Lamp
35Upfitter Auxiliary 2 (J-Case)
36Upfitter Auxiliary 1 (J-Case)
37Rear Blower (J-Case)
38Empty (J-Case)
39Run (High Current Micro)
40Park Lamps (High Current Micro)
41Empty (Mini Micro)
42Upfitter Auxiliary 2 (High Current ISO Relay)
43Retained Accessory Power (RAP) (High Current Micro)
44Rear Defogger (High Current Micro)
Circuit Breaker
45Power Window
46Power Seats

Fuse box diagram (Engine Compartment Fuse Box)

Assignment of the fuses and relay in the Engine Compartment Fuse Box (2008, 2009)
FuseUsage
1Left High-Beam Headlamp
2Fuel Pump
3Empty
4Diesel: Fuel Heater
5Right High-Beam Headlamp
6Empty
7Left Low-Beam Headlamp
8Right Stoplamp, Trailer Turn Signal
9Right Low-Beam Headlamp
10Daytime Running Lamps 2 (DRL)
11Gasoline: Fuel System Control Module Ignition
12Daytime Running Lamps 1 (DRL)
13Auxiliary Stoplamp
14Diesel: Fuel Operated Heater Module 
15Gasoline: Fuel System Control Module Battery
16Left Stoplamp, Trailer Turn Signal
17Gasoline: Canister Vent Solenoid
18Empty
19Empty
20Body Control Module 1
21Special Equipment Option (SEO)
22Body Control Module 4
23Body Control Module 6
24Empty
25Body Control Module 7
26Body Control Module 3
27Body Control Module 5
28Empty
29Empty
30Instrument Panel Cluster
31Empty
32Brake Switch
33Auxiliary Power Outlet
34Airbag
35Trailer Wiring
36Gasoline: Steering Wheel Sensor
37Body Control Module 2
38Cigarette Lighter, Data Link Controller
39Windshield Wiper
40Empty
41Windshield Washer
42Empty
43Horn
44Transmission Control Module Battery
45Empty
46Gasoline: Oxygen Sensor 1
47Transmission Control Module Ignition
48Engine Control Module Ignition
49Mass Airflow Sensor, Canister Vent
50Engine Control Module, Powertrain
51Transmission
52Gasoline: Even Ignition Injectors
53Diesel: Glow Plug Module
54Engine Control Module Battery
55Gasoline: Odd Ignition Injectors
56Gasoline: Oxygen Sensor 2
57Air Conditioning Compressor
58Diesel: Fan Clutch
59Gasoline: V6 Fuel Injectors
60Antilock Brake System Module (J-Case)
61Antilock Brake System Motor (J-Case)
62Trailer Wiring (J-Case)
63Empty
64Starter Solenoid (J-Case)
65Diesel: Engine Control Module (ECM), Powertrain (J-Case)
66Front Blower (J-Case)
67Empty
77Body BEC (Mega Fuse)
Relays
68Empty
69Run, Crank (High Current Micro)
70Windshield Wiper High (High Current Micro)
71Windshield Wiper (High Current Micro)
72Fuel Pump (Mini Micro)
73Crank (High Current Micro)
74Air Conditioning Compressor (Mini Micro)
75Fan Clutch (Solid State)
76Powertrain (High Current Micro)

2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018

Fuse box diagram (Floor Console Fuse Box)

Assignment of the fuses and relay in the Floor Console Fuse Box (2010-2018)
FuseUsage
F1
F2Steering Wheel Sensor
F3Auxiliary Parking Lamps
F4Front Park Lamps
F5Trailer Park Lamps
F6Upfitter/Parking lamps
F7Right Rear Park Lamp
F8Left Rear Park Lamp
F9Exterior rearview mirror switch
F10Airbag/Automatic occupant sensing
F11OnStar (If Equipped)
F12Door lock/unlock control upfitter (if equipped)
F13Heating, Ventilation and Air Conditioning 2
F14Heating, Ventilation and Air Conditioning 1
F15
F16Upfitter 1 (if equipped)
F17Exterior rearview heated mirrors
F18Rear Window Defogger
F19Compass
F20Radio/Chime/ SiriusXM satellite radio
F21Remote Function Actuator/Tire Pressure Monitor
F22Ignition Switch/Discrete Logic Ignition Sensor
F23Instrument Cluster
F24
F25Heating, Ventilation and Air Conditioning control
F26Auxiliary/Trailer reverse lamps
F27Reverse lamps
F28Upfitter 2/Reading lamps (if equipped)
F29Rear blower
F30Upfitter/Courtesy Lamps
F31Front Door Lock
F32Rear Door Lock
F33Cargo Door Unlock
F34Passenger Door Unlock
F35Rear Passenger Door Unlock
F36Driver Door Unlock
F37Empty
F38
Relays
K1Run (High Current Micro)
K2Empty (High Current Micro)
K3Park Lamps (High Current Micro)
K4Upfitter Auxiliary 2 (High Current Mini)
K5Rear Defogger (High Current Micro)
K6Retained Accessory Power (RAP) (High Current Micro)
Circuit Breaker
CB1Power Seats
CB2Power Windows

Fuse box diagram (Engine Compartment Fuse Box)

Assignment of the fuses and relay in the Engine Compartment Fuse Box (2010-2018)
FuseUsage
1ABS motor
2ABS module
3Right trailer stoplamp/Turnlamp
4
5
6Fuel system control module/Ignition
7Body Control Module 5
8Body Control Module 7
9Body Control Module 4
10Instrument cluster
11Trailer Wiring
122010-2016, 2018: —
2017: Interior rear vision camera module
132010-2016: Brake Switch
2017: —
2018: Interior rear vision camera module
14Windshield Washer
16Horn
17Transmission
18A/C
19Engine control module battery
202018: Cutaway/Left stoplamp/Turnlamp
21Left trailer stoplamp/Turnlamp
222018: Cutaway/Right stoplamp/Turnlamp
23
24Fuel Pump
25Auxiliary Power Outlet
26Body Control Module 3
27Special Equipment Option
28Airbag
29Steering Wheel Sensor
30Engine control module Ignition/Glow Plug Module
31Transmission control module/Ignition
32Transmission control module 1 battery/Engine control module battery power (gas 6 cyl)
332017-2018: Rear parking aid module
34
352010-2017: Fuel Operated Heater Module
2018: —
36Fuel System Control Module Battery
412018: Transmission control 2 module battery power
42Trailer wiring
432010-2016: Fan High
2017: EV fan clutch
2018: —
44Starter solenoid
45Engine control module/Powertrain
462010-2016: Fuel System Control Module Battery
2017: —
2018: AC DC inverter
47Cooling fan – low
51Left high-beam headlamp
52Right high-beam headlamp
53Left low-beam headlamp
54Right low-beam headlamp
55Wipers
56Canister Vent Solenoid
58Body Control Module 2
59Body Control Module 1
612010-2017: —
2018: Engine oil solenoid
62O2 sensor 2 / EV fan (diesel)
63
64Mass Air Flow/Canister Vent
65 Ignition/Injectors – odd
66Daytime Running Lamps 2
67Daytime Running Lamps 1
68Auxiliary Stop Lamps
692010-2016: —
2017: Trailer stoplamps
2018: External power for trailer
702018: Upfitter stoplamps
71Fuel heater/Flex fuel sensor
72Body Control Module 6
73Lighter/Data Link Connection
74Front blower
75V6 fuel injectors
76
77O2 sensor 1
78Engine control module/Powertrain
79Ignition/Injectors – even
Relays
15Run/Crank
37
38Fuel Pump
39Crank
40A/C Compressor
482010-2016: Fan High
2017: EV fan clutch
2018: —
49Powertrain
502010: Fan Clutch (EV)
2011-2018: —
57Cooling fan – low
60Fan Control

Auxiliary Fuse Block (2018)

This block is located near the fuse box in the engine compartment

Auxiliary Fuse Block
FusesUsage
MR-1Upfitter 1
MR-2Upfitter 2
MR-3Upfitter power control
MR Rel 1Upfitter 1
MR Rel 2Upfitter 1

Mega Fuse Holder (2018) – Starter motor

Chevrolet Express (2003-2018) fuses and relays November 13, 2018 admin