The 2019 Buick LaCrosse has 2 different fuse boxes:
Engine Compartment Fuse Block diagramInstrument Panel Fuse Block diagramBuick LaCrosse fuse box diagrams change across years, pick the right year of your vehicle:
| Type | No. | Description | |
|---|---|---|---|
Fuse MINI | 1 | - | |
Fuse MINI | 2 | - | |
Fuse FMX/JCase | 3 | Antilock brake system pump | |
Fuse FMX/JCase | 5 | - | |
Fuse MINI | 6 | Rear closure | |
Fuse MINI | 7 | Left corner lamp | |
Fuse MINI | 8 | Power windows/ Rearview mirror/ Power seats | |
Fuse MINI | 9 | Electric brake boost/ Pedestrian alert | |
Fuse MINI | 10 | Airbag sensing diagnostic module/ Passenger sensing module eAssist | |
Fuse FMX/JCase | 11 | DC DC Battery 1 | |
Fuse FMX/JCase | 12 | Rear window defogger | |
Fuse MINI | 13 | Heated mirrors | |
Fuse MINI | 14 | - | |
Fuse MINI | 15 | Passive entry/ Passive start | |
Fuse FMM/MCase | 16 | Front wipers | |
Fuse FMM/MCase | 17 | Passenger power seat | |
Fuse FMM/MCase | 18 | Antilock brake system valve | |
Fuse FMM/MCase | 19 | Driver power seat | |
Fuse MINI | 21 | Sunroof | |
Fuse MINI | 22 | Right corner lamp | |
Fuse MINI | 23 | Auto headlamp leveling | |
Fuse MINI | 24 | - | |
Fuse MINI | 26 | Transmission control module/Ignition | |
Fuse MINI | 27 | Instrument panel/ Ignition | |
Fuse MINI | 28 | - | |
Fuse MINI | 29 | Rear vision camera/ Ventilated seats | |
Fuse ATO | 30 | Malfunction indicator lamp/Shift solenoid | |
Fuse MINI | 32 | Canister vent solenoid | |
Fuse ATO | 33 | Front heated seats | |
Fuse ATO | 34 | Battery system manager/ Fan control module/Rear drive control module/ Damping control module | |
Fuse ATO | 35 | Fog lamps | |
Fuse MINI | 36 | Fuel module | |
Fuse MINI | 38 | - | |
Fuse MINI | 39 | - | |
Fuse MINI | 40 | Steering columnn lock | |
Fuse ATO | 41 | - | |
Fuse MINI | 43 | Heated steering wheel | |
Fuse MINI | 44 | Headlamp leveling/ Rear seat ventilation | |
Fuse FMM/MCase | 45 | - | |
Fuse MINI | 46 | Engine control module/Ignition | |
Fuse MINI | 47 | - | |
Fuse FMX/JCase | 48 | Electric brake boost/ Left cooling fan | |
Fuse FMX/JCase | 49 | DC DC battery 2/ Rear drive control module | |
Fuse MINI | 50 | - | |
Fuse MINI | 51 | - | |
Fuse MINI | 52 | - | |
Fuse MINI | 53 | - | |
Fuse MINI | 54 | - | |
Fuse MINI | 55 | - | |
Fuse FMM/MCase | 56 | - | |
Fuse FMX/JCase | 57 | Transmission auxiliary pump | |
Fuse FMX/JCase | 58 | Transmission range control module | |
Fuse ATO | 59 | High-beam headlamps | |
Fuse FMX/JCase | 60 | Cooling fan | |
Fuse MINI | 61 | - | |
Fuse MINI | 62 | - | |
Fuse MINI | 63 | - | |
Fuse MINI | 65 | Air conditioning (HEV) | |
Fuse ATO | 67 | - | |
Fuse ATO | 68 | - | |
Fuse MINI | 69 | Right HID low-beam headlamps | |
Fuse MINI | 70 | Left HID low-beam headlamps | |
Fuse FMX/JCase | 72 | Starter pinion | |
Fuse MINI | 74 | Starter motor | |
Fuse MINI | 75 | Engine control module | |
Fuse MINI | 76 | Powertrain - off engine | |
Fuse MINI | 77 | - | |
Fuse MINI | 78 | Horn | |
Fuse MINI | 79 | Washer pump | |
Fuse ATO | 81 | Transmission control module/Engine control module | |
Fuse MINI | 82 | - | |
Fuse ATO | 83 | Ignition coil - odd | |
Fuse ATO | 84 | Ignition coil - even | |
Fuse FMX/JCase | 85 | Shunt | |
Fuse MINI | 86 | Shunt | |
Fuse FMX/JCase | 87 | - | |
Fuse MINI | 88 | Aeroshutter | |
Fuse FMM/MCase | 89 | Headlamp washer | |
Fuse FMM/MCase | 91 | - | |
Fuse MINI | 92 | Traction power invert module/ Motor generator unit coolant motor | |
Fuse MINI | 93 | Headlamp leveling | |
Fuse MINI | 95 | - | |
Fuse FMM/MCase | 96 | - | |
Fuse MINI | 97 | - | |
Fuse MINI | 99 | - | |
Relay | 4 | - | |
Relay | 20 | Rear defogger | |
Relay | 25 | Front wiper control | |
Relay | 31 | Run/Crank | |
Relay | 37 | Front wiper speed | |
Relay | 42 | Transmission auxiliary pump | |
Relay | 64 | Air conditioning control | |
Relay | 66 | Powertrain | |
Relay | 71 | HID low-beam headlamps | |
Relay | 73 | Starter motor | |
Relay | 80 | Starter pinion | |
Relay | 90 | - | |
Relay | 94 | Headlamp washer | |
Relay | 98 | - |
| Type | No. | Description | |
|---|---|---|---|
Fuse FMM/MCase | F1 | Left window | |
Fuse FMM/MCase | F2 | Right window | |
Fuse FMM/MCase | F3 | - | |
Fuse FMX/JCase | F4 | Heating ventilation & air conditioning blower motor | |
Fuse MICRO2 | F5 | Body control module 2 | |
Fuse MICRO2 | F6 | Electric steering column | |
Fuse MICRO2 | F7 | - | |
Fuse MICRO2 | F8 | Body control module 3 | |
Fuse MICRO2 | F9 | Engine control module/ Battery | |
Fuse MICRO2 | F10 | Body control module 2 (stop/start) | |
Fuse MICRO2 | F14 | - | |
Fuse MICRO2 | F15 | Transmission control module (stop/start) | |
Fuse MICRO2 | F16 | Amplifier | |
Fuse MICRO2 | F17 | - | |
Fuse MICRO2 | F18 | Body control module 7 | |
Fuse MICRO2 | F19 | - | |
Fuse MICRO2 | F20 | Body control module 1 | |
Fuse MICRO2 | F21 | Body control module 4 | |
Fuse MICRO2 | F22 | Body control module 6 | |
Fuse MICRO2 | F23 | Electric steering column lock | |
Fuse MICRO2 | F24 | Airbag sensing diagnostic module/ Passenger sensing module | |
Fuse MICRO2 | F25 | Data link connector | |
Fuse MICRO2 | F26 | - | |
Fuse FMX/JCase | F27 | AC DC inverter | |
Fuse FMX/JCase | F28 | HID headlamps | |
Fuse MICRO2 | F29 | Body control module 8 | |
Fuse MICRO2 | F30 | Overhead console | |
Fuse MINI | F31 | Steering wheel control | |
Fuse MINI | F32 | - | |
Fuse MICRO2 | F33 | Heating, ventilation & air conditioning | |
Fuse MICRO2 | F34 | Communication gateway module | |
Fuse MICRO2 | F35 | Integrated chassis control module | |
Fuse MICRO2 | F36 | Charger | |
Fuse MICRO2 | F37 | Auxiliary power outlet/ Cigar lighter | |
Fuse MICRO2 | F38 | OnStar | |
Fuse MICRO2 | F39 | Display | |
Fuse MICRO2 | F40 | Obstacle detection | |
Fuse MICRO2 | F41 | Body control module 1 (stop/start) | |
Fuse MICRO2 | F42 | Radio | |
Circuit breaker MINI | F43 | Rear accessory power outlet | |
Circuit breaker MINI | F44 | Front accessory power outlet | |
Relay | K1 | - | |
Relay | K2 | Retained accessory power | |
Relay | K3 | - | |
Relay | K4 | - | |
Relay | K5 | Logistics | |
Fuse MICRO2 | F11 | - | |
Fuse MICRO2 | F12 | - | |
Fuse MICRO2 | F13 | - |
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Source: Buick LaCrosse 2019 Owner's Manual
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