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Chevrolet Express (2018) - fuse box diagram

avatar Jonathan Yarden Mar 27, 2021 · 5 min. read

In this article you will find a description of fuses and relays Chevrolet, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 2018

Engine Compartment Fuse Block

The fuse block is located in the engine compartment on the driver side of the vehicle.

Chevrolet Express - fuse box - engine compartment

Fuse Usage
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 —
13 Interior rear vision camera module
14 Windshield Washer
16 Horn
17 Transmission
18 A/C
19 Engine control module battery
20 Cutaway/Left stoplamp/Turnlamp
21 Left trailer stoplamp/Turnlamp
22 Cutaway/Right stoplamp/Turnlamp
23 —
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
31 Transmission control module/Ignition
32 Transmission control module 1 battery/Engine control module battery power (gas 6 cyl)
33 Rear parking aid module
34 —
35 —
36 Fuel System Control Module Battery
41 Transmission control 2 module battery power
42 Trailer wiring
43 —
44 Starter solenoid
45 Engine control module/Powertrain
46 AC DC inverter
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 Engine oil solenoid
62 O2 sensor 2
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 External power for trailer
70 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
76 —
77 O2 sensor 1
78 Engine control module/Powertrain
79 Ignition/Injectors – even


Relay Usage
15 Run/Crank
37 —
38 Fuel Pump
39 Crank
40 A/C Compressor
48 —
49 Powertrain
50 —
57 Cooling fan – low
60 Fan Control


Auxiliary Fuse Block

This component is near the fuse block in the engine compartment.

Chevrolet Express - fuse box - auxiliary block

Fuses Usage
MR-1 Upfitter 1
MR-2 Upfitter 2
MR-3 Upfitter power control
MR Rel 1 Upfitter 1
MR Rel 2 Upfitter 1

Mega Fuse Holder

Chevrolet Express - fuse box - mega fuse holder

Fuses Usage
1 Starter motor

Floor Console Fuse Block

The floor console fuse block is located under the driver seat.

Chevrolet Express - fuse box - floor console fuse block

Fuse Usage
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 —
F12 Door lock/unlock control upfitter (if equipped)
F13 HVAC 2
F14 HVAC 1
F15 —
F16 Upfitter 1
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 HVAC control
F26 Auxiliary/Trailer reverse lamps
F27 Reverse lamps
F28 Upfitter 2/Reading lamps
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 —


Relays Usage
K1 Run
K2 —
K3 Park Lamps
K4 Upfitter 2
K5 Rear Defogger
K6 Retained Accessory Power


Circuit Breaker Usage
CB1 Power Seats
CB2 Power Windows

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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