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Buick LaCrosse (2013 - 2015) - 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: 2013, 2014, 2015

Engine Compartment Fuse Block

Buick LaCrosse - fuse box - engine compartment

J-Case Usage
6 Wiper
12 Starter
21 Rear power windows
22 Sunroof
24 Front power windows
25 Rear heated seats
26 Antilock brake system pump
27 Electric parking brake
28 Rear window defogger
41 Brake vacuum pump
42 Cooling fan K2
43 Not Used
44 Transmission auxiliary oil pump (eAssist)
45 Cooling fan K1
59 AIR pump


Mini Fuses Usage
1 Transmission control module–battery
2 Engine control module battery
3 Air Conditioning Compressor Clutch
5 Engine control module/Run/Crank
7 Long range radar/ Front camera
8 Ignition coils–even (6–cylinder engine)/ Ignition coils–all (4–cylinder engine)
9 Ignition coils–odd (6–cylinder engine)
10 Engine control module–switched battery
11 6–cylinder Engine: post catalytic converter/O2 sensor/ Heater/Mass air flow sensor/FlexFuel sensor/Secondary air induction solenoid
13 Crank for transmission control module/Fuel pump power/Chassis control module (eAssist)
14 Cabin heater coolant pump (eAssist)/ secondary air injector/Secondary air injector with pressure sensor
15 Motor generator unit coolant pump (eAssist)
16 Run/Crank for eAssist power inverter module
17 Not Used
18 Sunshade module/ Vehicle air purification system/ Ventilated seats
20 Heated steering wheel (non eAssist)
23 Variable effort steering (if equipped) or eAssist power inverter module
29 Heated seat/Left power lumbar
30 Heated Seat/Right power pack cooling fan (eAssist)
31 AWD/Electronic suspension control
32 Body control module 6
33 Memory seat–front
34 Antilock brake system valves
35 Amplifier
36 Adaptive forward lighting (AFL) motors–battery
37 Right high-beam
38 Left high-beam
46 Cooling fan relay
47 Six Cylinder Engine: Pre Catalytic Converter Oxygen Sensor Heater, Canister Purge Solenoid. Four Cylinder Engine: Pre and Post Catalytic Converter Oxygen Sensor Heaters, Canister Purge Solenoid
48 Fog lamps
49 Right High Intensity Discharge Headlamp
51 Horn
52 Cluster Run/Crank
53 Run/Crank for: rearview mirror/Rear vision camera/Air quality sensor/Aero shutter motor
54 Run/Crank for: HVAC/Headlamp switch
55 Outside rearview mirror/Universal remote system/Front window switches
56 Windshield washer
60 Heated mirror
62 Canister vent
64 Adaptive forward lighting (AFL) module–battery
65 Not Used
66 AIR solenoid (eAssist)
67 Fuel pump power module/Chassis control module
69 Regulated voltage control sensor
70 Parking assist/Side blind zone
71 Passive entry/ Passive start


Mini Relays Usage
7 Engine control module
9 Cooling fan
13 Cooling fan
15 Run/Crank
16 AIR pump
17 Rear window defogger


Micro Relays Usage
1 A/C Clutch
2 Starter
4 Wiper speed
5 Wiper control
6 Cabin heater coolant pump (eAssist)/ Secondary air injector/Secondary air injector with pressure senso
10 Cooling fan
14 Headlamp low-beam

Ultra Micro Relays Usage
11 Transmission auxiliary oil pump (eAssist)

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 - instrument panel

Fuses Usage
1 APO 3
2 Body control module 7
3 Steering wheel controls backlight
4 Radio/Human machine interface/ Rear auxiliary audio jack/Front auxiliary audio video jack/ Touchpad/Remote media player/Bluray remote media player
5 OnStar/Universal hands–free phone
6 Power outlet 1
7 Power outlet 2
8 Body control module 1
9 Body control module 4
10 Body control module 8
11 Front HVAC/Blower
12 Passenger seat
13 Driver seat
14 Diagnostic link connector
15 Airbag/Automatic occupant sensing
16 Trunk
17 HVAC Controller
18 Pre-fuse for fuses 4 and 5
19 Center stack displays/Head-up display/Right steering wheel control switch/Rear seat infotainment display (eAssist)/ HVAC/Center stack displays
20 Rear seat entertainment display/Rear seat audio
21 Instrument cluster
22 Discrete logic ignition switch
23 Body control module 3
24 Body control module 2
25 Rear HVAC/Blower
26 AC DC inverter


Relays Usage
R1 Trunk relay
R2 —
R3 Power outlet relay

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

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