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Buick LaCrosse (2018) - fuse box diagram

avatar 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

Buick LaCrosse - fuse box - engine compartment

Fuses Usage
1 —
2 —
3 ABS pump
5 AC DC inverter
6 Rear closure
7 Left corner lamp
8 Power windows/ Rearview mirror/ Power seats
9 Engine boost
10 Airbag sensing diagnostic module/Passenger sensing module —eAssist
11 DC DC Battery 1
12 Rear window defogger
13 Heated mirrors
14 —
15 Passive entry/ Passive start
16 Front wipers
17 Passenger power seat
18 ABS valve
19 Driver power sea
21 Sunroof
22 Right corner lamp
23 Auto headlamp leveling
24 —
26 Transmission control module/Ignition
27 Instrument panel/ Ignition
28 Electronic precision shift/Ignition
29 Rear vision camera/ Ventilation
30 Malfunction indicator lamp/Shift solenoid
32 Canister vent solenoid
33 Front heated seats
34 BSM (eAssist)/Fan control module/Damping control module (SADS)
35 Fog lamps
36 Fuel module
38 —
39 —
40 Steering columnn lock
41 —
43 Heated steering wheel
44 Headlamp leveling/ Rear seat ventilation
45 —
46 Engine control module/Ignition
47 —
48 Engine boost/Left cooling fan
49 DC DC battery 2/AWD
50 —
51 —
52 —
53 —
54 —
55 —
56 —
57 Transmission auxiliary pump
58 TRCM
59 High-beam headlamps
60 Cooling fan
61 —
62 —
63 —
65 A/C HEV
67 —
68 —
69 Right HID low-beam headlamps
70 Left HID low-beam headlamps
72 Starter pinion
74 Starter motor
75 Engine control module
76 Powertrain – off engine
77 —
78 Horn
79 Washer pump
81 Transmission control module/ Engine control module
82 —
83 Ignition coils
84 Coil
85 Engine control module switch 2
86 Engine control module switch 1
87 SAI reaction pump
88 Aeroshutter
89 Headlamp washer
91 —
92 TPIM motor generator unit pump
93 Headlamp leveling
95 SAI reaction solenoid
96 Fuel heater
97 —
99 Coolant pump

 

Relays Usage
4 AC DC inverter
20 Rear defogger
25 Front wiper control
31 Run/Crank
37 Front wiper speed
42 Transmission auxiliary pump
64 A/C control
66 Powertrain
71 HID low-beam headlamps
73 Starter motor
80 Starter pinion
90 SAI reaction solenoid
94 Headlamp washer
98 SAI reaction pump

Instrument Panel Fuse Block

The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.

Buick LaCrosse - fuse box - instgrument panel

Fuses Usage
F1 Left window
F2 Right window
F3 —
F4 HVAC blower
F5 Battery 2
F6 Electric steering column
F7 —
F8 Battery 3
F9 Engine control module/Battery
F10 Body control module 2 On/Off
F11 —
F12 —
F13 —
F14 —
F15 Transmission control module On/Off
F16 Amplifier
F17 —
F18 Battery 7
F19 —
F20 Battery 1
F21 Battery 4
F22 Battery 6
F23 Electric steering column lock
F24 Airbag sensing diagnostic module/ Passenger sensing module
F25 Diagnostic link
F26 —
F27 AC DC inverter
F28 —
F29 Body control module 8
F30 Overhead console
F31 Steering wheel control
F32 —
F33 HVAC
F34 Center gateway module
F35 Integrated chassis control module
F36 Charger
F37 Auxiliary power outlet/Cigar lighter
F38 OnStar
F39 Monitor
F40 Object detection
F41 Body control module 1 On/Off
F42 Radio
F43 Rear accessory power outlet
F44 Front accessory power outlet

 

Relays Usage
K1 —
K2 Retained accessory power
K3 —
K4 —
K5 Logistics

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

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