Jonathan Yarden Jan 30, 2021 · 5 min. read
In this article you will find a description of fuses and relays Buick,
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
| Fuses | Usage |
| 1 | Engine control module |
| 2 | O2 sensor |
| 3 | Fuel injection/ Ignition system |
| 4 | Fuel injection/ Ignition system |
| 5 | β |
| 6 | Heated mirrors |
| 7 | Fan control |
| 8 | O2 sensor/ Powertrain cooling |
| 9 | Rear window sensor |
| 10 | Vehicle battery sensor |
| 11 | Trunk release |
| 12 | Adaptive headlamps/ Automatic headlamp leveling |
| 13 | ABS valves |
| 14 | β |
| 15 | Engine control module |
| 16 | Starter |
| 17 | Transmission control module |
| 18 | Rear window defogger |
| 19 | Front power window |
| 20 | Rear power window |
| 21 | Rear electrical center |
| 22 | β |
| 23 | β |
| 24 | Right high-beam headlamp |
| 25 | Left high-beam headlamp |
| 26 | Front fog lamps |
| 27 | β |
| 28 | β |
| 29 | Electric parking brake |
| 30 | ABS pump |
| 31 | β |
| 32 | Airbag |
| 33 | Adaptive forward lighting/Automatic headlamp leveling |
| 34 | Exhaust gas recirculation |
| 35 | Power windows/Rain sensor/Exterior mirror |
| 36 | Climate control |
| 37 | β |
| 38 | Vacuum pump |
| 39 | Fuel system control module |
| 40 | Front windshield washer |
| 41 | β |
| 42 | Engine cooling fan |
| 43 | Windshield wipers |
| 44 | β |
| 45 | Engine cooling fan |
| 46 | β |
| 47 | Horn |
| 48 | Engine cooling fan |
| 49 | Fuel pump |
| 50 | Headlamp leveling/ Adaptive forward lighting |
| 51 | β |
| 52 | β |
| 53 | Transmission control module/Engine control module |
| 54 | Vacuum pump/ Instrument panel cluster/HVAC |
Instrument Panel Fuse Block
The instrument panel fuse block is on the driver side of the instrument panel.
| Fuses | Usage |
| 1 | Displays |
| 2 | Body control module/Exterior lamps |
| 3 | Body control module/Exterior lamps |
| 4 | Infotainment system |
| 5 | Infotainment system/ InstrumentΒ cluster |
| 6 | Power outlet |
| 7 | Power outlet |
| 8 | Body control module/Left low-beam headlamp |
| 9 | Body control module/Right low-beam headlamp |
| 10 | Body control module/Door locks |
| 11 | Interior fan |
| 12 | Driver power seat |
| 13 | Passenger power seat |
| 14 | Diagnostic connector |
| 15 | Airbag |
| 17 | A/C system |
| 18 | Service diagnose |
| 19 | Body control module/Brake lamps/Reverse lamps/Interior lamps |
| 20 | β |
| 21 | Instrument panel |
| 22 | Ignition |
| 23 | Body control module |
| 24 | Body control module |
| 25 | β |
| 26 | Trunk power outlet accessory |
| Relays | Usage |
| 16 | Trunk lid relay |
Rear Compartment Fuse Block
The rear compartment fuse block, if equipped, is on the left side of the trunk behind a cover.
| Fuses | Usage |
| 1 | Convertible control module/Right power rail |
| 2 | β |
| 3 | Rear parking assist |
| 4 | Selective catalytic reduction system |
| 5 | β |
| 6 | β |
| 7 | Power seats |
| 8 | Convertible control module |
| 9 | Selective catalytic reduction system |
| 10 | Selective catalytic reduction system |
| 11 | Tire pressure monitor/Rear vision camera |
| 12 | Convertible control module/Reverse lamps |
| 13 | β |
| 14 | Rear seat electrical folding |
| 15 | β |
| 16 | Rear vision camera/ Convertible control module |
| 17 | β |
| 18 | β |
| 19 | Heated steering whee |
| 20 | β |
| 21 | Heated seats |
| 22 | β |
| 23 | Convertible control module/Left power rail |
| 24 | Selective catalytic reduction system |
| 25 | β |
| 26 | Non-logistic mode |
| 27 | Passive entry/ Passive start |
| 28 | β |
| 29 | Hydraulic unit |
| 30 | β |
| 31 | β |
| 32 | β |
WARNING:Β Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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