Jonathan Yarden Mar 25, 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 engine compartment fuse block is located on the driver side of the vehicle, near the battery.
1.8L Engines
| Mini fuses | Usage |
| 1 | ABS valve |
| 2 | Sunroof |
| 4* | Rear fog lamp |
| 5 | Exterior rearview mirror/Power window switch |
| 6 | Automatic occupant sensing/ROS |
| 7 | Passive entry/Passive start |
| 8 | Regulated voltage control |
| 10 | –/Intelligent battery sensor |
| 11 | Rear window defogger |
| 12 | Electric steering column lock |
| 13* | –/SAI valve |
| 14 | Heated exterior rearview mirror |
| 15 | Front heated seats |
| 16 | Fuel system control module 1 |
| 17 | Canister vent |
| 18 | Washer |
| 19* | Fuel pump |
| 20 | Engine control module 5 |
| 21 | Fuel system control module 2/Leveling |
| 22 | Transmission control module 1/DC DC converter |
| 24 | Engine control module 1 |
| 25 | Coil |
| 26 | Engine control module 4 |
| 27 | Engine control module 3 |
| 28 | Engine control module 2 |
| 29 | Injector/Ignition coil |
| 30 | Engine control module |
| 31 | Air conditioning clutch |
| 32 | Transmission control module |
| 33 | Horn |
| 34 | Front fog lamps |
| 35 | Left high-beam headlamp |
| 36 | Right high-beam headlamp |
| * = If equipped | |
| J-Case fuse | Usage |
| 1 | Front wipers |
| 2 | Antilock brake system pump |
| 3 | Blower |
| 4 | Run/Crank IEC |
| 6 | Cooling Fan K4 |
| 7 | Cooling Fan K5 |
| 8* | SAI pump |
| 9 | Electric vacuum pump |
| 10 | Start |
| * = If equipped | |
| Relays | Usage |
| RLY 1 | Front wiper control |
| RLY 2* | Rear fog lamp |
| RLY 3 | Front wiper speed |
| RLY 4 | Rear defogger |
| RLY 5 | Run/Crank |
| RLY 6* | –/SAI valve |
| RLY 8* | Fuel pump |
| RLY 9* | SAI pump |
| RLY 10 | Cooling fan K3 |
| RLY 11 | P/T |
| RLY 12 | Start |
| RLY 13 | Air conditioning clutch |
| RLY 14 | High-beam headlamps |
| RLY 15 | Cooling fan K1 |
| * = If equipped | |
1.4L Engine
| Mini fuses | Usage |
| 1 | Antilock brake system valve |
| 2 | Sunroof |
| 4* | Rear fog lamp |
| 5 | Exterior rearview mirror/Power window switch |
| 6 | Automatic occupant sensing/ROS |
| 7 | Passive entry/Passive start |
| 8 | Regulated voltage control |
| 9 | Rear wiper |
| 10 | –/Intelligent battery sensor |
| 11 | Rear window defogger |
| 12 | Electric steering column lock |
| 14 | Heated Exterior rearview mirror |
| 15 | Front heated seats |
| 16 | Fuel system control module 1 |
| 17 | Canister vent |
| 18 | Washer |
| 20 | Engine control module 5 |
| 21 | Fuel system control module 2/Leveling |
| 22 | Transmission control module 1/DC DC converter |
| 24 | Engine control module 1 |
| 25 | Coil |
| 26 | Engine Control Module 4 |
| 27 | Engine Control Module 3 |
| 28 | Engine Control Module 2 |
| 29 | Injector/Ignition Coil |
| 30 | Engine control module |
| 31 | Air conditioning clutch |
| 32 | Transmission control module |
| 33 | Horn |
| 34 | Front fog lamps |
| 35 | Left high-beam headlamp |
| 36 | Right high-beam headlamp |
| * = If equipped | |
| J-Case fuse | Usage |
| 1 | Front Wiper |
| 2 | Antilock brake system pump |
| 3 | Blower |
| 4 | Run/Crank IEC |
| 5 | Power seat |
| 6 | Cooling Fan K4 |
| 7 | Cooling Fan K5 |
| 9 | Electric vacuum pump |
| 10 | Start |
| * = If equipped | |
| Relays | Usage |
| RLY 1 | Front wiper control |
| RLY 2* | Rear fog lamp |
| RLY 3 | Front wiper speed |
| RLY 4 | Rear Defogger |
| RLY 5 | Run/Crank |
| RLY 9 | Cooling fan K2 |
| RLY 10 | Cooling Fan K3 |
| RLY 11 | P/T |
| RLY 12 | Start |
| RLY 13 | Air conditioning clutch |
| RLY 14 | High-beam headlamps |
| RLY 15 | Cooling Fan K1 |
| * = If equipped | |
Instrument Panel Fuse Block
The instrument panel fuse block is located on the underside of the driver side instrument panel.
| Fuses | Description |
| DLS | Discrete logic ignition switch |
| DLC | Data Link Connector |
| SDM | Sensing and diagnostic module |
| L/GATE | Liftgate |
| PWR WNDW REAR | Rear power window |
| BCM8 | Body Control Module 8 |
| BCM7 | Body Control Module 7 |
| BCM6 | Body Control Module 6 |
| BCM5 | Body Control Module 5 |
| BCM4 | Body Control Module 4 |
| BCM3 | Body Control Module 3 |
| BCM2 | Body Control Module 2 |
| BCM1 | Body Control Module 1 |
| IPC | Instrument panel cluster |
| TELEMATICS | Telematics |
| PAS/SBSA | Parking assist system/Side blind spot alert system |
| RAIN SNSR | Rain sensing wiper |
| AUDIO | Audio |
| TRAILER1 | Trailer 1 |
| LDW/FCA | Lane departure warning/Front collision alert |
| CGM | Central gateway module |
| HVAC1 | Heating, ventilation, and air conditioning 1 |
| HLLD SW | Automatic headlamp leveling switch |
| IPC/AOS | Instrument panel cluster/Automatic occupant sensing display |
| SPARE | — |
| TRAILER2 | Trailer hitch 2 |
| CLOCKSPRING | Clock spring |
| HVAC2 | Heating, ventilation, and air conditioning 2 |
| HTD STR WHL | Heated steering wheel |
| SPARE | — |
| S/ROOF SW | Sunroof switch |
| CIGAR APO | Cigar auxiliary power outlet |
| ESCL | Electric steering column lock |
| PWR WNDW FRONT | Front power windows |
| IRAP ACCY | IRAP accessory |
| BATT CONN | Battery connector |
| RUN RELAY | Run relay |
| L/GATE RELAY | Liftgate relay |
| IRAP RELAY | IRAP relay |
| RAP/ACCY RELAY | Retained accessory power/Accessory relay |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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