Chevrolet Express 2023 Fuse Box Info
Passenger compartment fuse box location:
The floor console fuse box is located under the driver’s seat.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | - |
| 2 | Steering wheel sensor |
| 3 | Auxiliary parking lamps |
| 4 | Front parking lamps |
| 5 | Trailer parking lamps |
| 6 | Upfitter/Parking lamps |
| 7 | Right rear parking lamp |
| 8 | Left rear parking lamp |
| 9 | Outside View Mirror Switch/Front Camera Module |
| 10 | Airbag/Automatic occupant sensing |
| 11 | – / OnStar |
| 12 | - |
| 13 | HVAC 2 |
| 14 | HVAC 1 |
| 15 | Reflected LED display |
| 16 | Upfitter aux 1/Gas ambulance |
| 17 | Heated outside mirrors |
| 18 | Rear window defogger |
| 19 | Compass |
| 20 | Radio/Chime/ SiriusXM satellite radio |
| 21 | Remote function actuator/Tire pressure monitor |
| 22 | Ignition Switch/Discrete Logic Ignition Sensor/ Pass Key 3 |
| 23 | Instrument cluster |
| 24 | - |
| 25 | HVAC control |
| 26 | Auxiliary/Trailer reverse lamps |
| 27 | Reverse tail lamps |
| 28 | Upfitter 2/Gas Ambulance |
| 29 | Rear blower |
| 30 | Upfitter/Courtesy lamps |
| 31 | Front door lock |
| 32 | Rear door lock |
| 33 | Cargo door unlock |
| 34 | Front passenger door unlock |
| 35 | Rear passenger door unlock |
| 36 | Driver door lock |
| 37 | - |
| 38 | - |
| Relays | |
| K1 | Run |
| K2 | - |
| K3 | Parking lamps |
| K4 | Upfitter 2 |
| K5 | Rear window defogger |
| K6 | Retained accessory power |
| Circuit Breaker | |
| CB1 | Power Seats |
| CB2 | Power Windows |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | ABS motor |
| 2 | ABS module |
| 3 | Right trailer stoplamp/Turn signal lamp |
| 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 | Left stop/turn cutaway lamp |
| 21 | Left stop/turn trailer lamp |
| 22 | Right stop/turn cutaway lamp |
| 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 |
| 33 | Rear parking aid module |
| 34 | - |
| 35 | - |
| 36 | Fuel system control module battery |
| 41 | Transmission control module 2/Battery power |
| 42 | Trailer wiring |
| 43 | - |
| 44 | Starter solenoid |
| 45 | Engine control module/Powertrain signal 2 |
| 46 | AC DC inverter |
| 47 | Fan Low Speed |
| 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 coils/injectors - odd |
| 66 | Daytime running lamps 2 |
| 67 | Daytime running lamps 1 |
| 68 | Auxiliary stoplamps |
| 69 | External power for trailer |
| 70 | Upfitter stoplamps |
| 71 | Fuel heater/Flex fuel sensor |
| 72 | Body control module 6 |
| 73 | Lighter/Data link connector |
| 74 | Front blower |
| 75 | Engine control module diesel |
| 76 | - |
| 77 | O2 sensor 1 |
| 78 | Engine control module/Powertrain signal 1 |
| 79 | Ignition coils/Injectors – even |
| Relays | |
| 15 | Run/Crank |
| 37 | - |
| 38 | Fuel pump |
| 39 | Crank |
| 40 | A/C compressor |
| 48 | - |
| 49 | Powertrain |
| 50 | - |
| 57 | - |
| 60 | - |
Auxiliary fuse box (near the fuse box in the engine compartment):
| Fuse/Relay N° | Functions |
| Fuses | |
| MR-1 | Upfitter 1 |
| MR-2 | Upfitter 2 |
| MR-3 | Upfitter power control |
| Relays | |
| MR Rel 1 | Upfitter 1 |
| MR Rel 2 | Upfitter 2 |
