Fuse Box Diagrams Buick LaCrosse (2014-2016)

In this article, you will find information about the fuses of the Buick LaCrosse (models 2014, 2015, and 2016), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.

Buick LaCrosse (2014-2016)

Checking and Replacing Fuses in Buick LaCrosse

The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.

To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating. Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible.

Caution!

  • Data on the replacement fuse must match the data on the defective fuse.
  • Before replacing a fuse, turn every vehicle electrical switch off.

Location of Fuse Boxes

Instrument Panel Fuse Block:
The instrument panel fuse block is located in the instrument panel, on the driver side of the vehicle. To access the fuses, open the fuse panel door by pulling down at the top. Press in on the sides of the door to release it from the instrument panel. Pull the door toward you to release it from the hinge.Buick LaCrosse (2014-2016): Passenger compartment fuse panel location

Engine Compartment Fuse Block:
To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up.Buick LaCrosse (2014-2016): Engine compartment fuse box location

Fuse Box Diagrams

2014-2015

Instrument Panel Fuse Block

Buick LaCrosse (2014-2015): Instrument panel fuse box diagram

List of fuses in the Instrument Panel Fuse Block (2014-2015)
№Usage
1APO 3
2Body Control Module 7
3Steering Wheel Controls Backlight
4Radio / Human Machine Interface / Rear Auxiliary Audio Jack / Front Auxiliary Audio Video Jack / TOUCHPAD / Remote Media Player / BLURAY Remote Media Player
5OnStar / Universal Handsfree Phone
6Power Outlet 1
7Power Outlet 2
8Body Control Module 1
9Body Control Module 4
10Body Control Module 8 (J-Case Fuse)
11Front Heater Ventilation Air Conditioning / Blower (J-Case Fuse)
12Passenger Seat (Circuit Breaker)
13Driver Seat (Circuit Breaker)
14Diagnostic Link Connector
15Airbag / Automatic Occupant Sensing
16Trunk
17Heater Ventilation Air Conditioning Controller
18Pre-Fuse for Fuses 4 and 5
19Center Stack Displays, Head-Up Display, Right Steering Wheel Control Switch, Rear Seat Infotainment Display (eAssist), HVAC Center Stack Displays
20Rear Seat Entertainment Display / Rear Seat Audio
21Instrument Panel Cluster
22Discrete Logic Ignition Switch
23Body Control Module 3
24Body Control Module 2
25Rear Heater Ventilation Air Conditioning / Blower
26AC/DC Inverter
Relays
R1Trunk Relay
R2Not Used
R3Power Outlet Relay
Engine Compartment Fuse Block

Buick LaCrosse (2014-2015): Engine compartment fuse box diagram

List of fuses in the Engine Compartment Fuse Block (2014-2015)
№Usage
Mini Fuses
1Transmission Control Module - Battery
2Engine Control Module Battery
3Air Conditioning Compressor Clutch
5Engine Control Module Run/Crank
7Long Range Radar / Front Camera
8Ignition Coils - Even (Six Cylinder Engine), Ignition Coils - All (Four Cylinder Engine)
9Ignition Coils - Odd (Six Cylinder Engine)
10Engine Control Module - Switched Battery (from Engine Control Module Relay)
11Six Cylinder Engine: Post Catalytic Converter Oxygen Sensor Heater, Mass Air Flow Sensor, Flex Fuel Sensor, Secondary Air Induction Solenoid
13Crank for Transmission Control Module / Fuel Pump Power / Chassis Control Module (eAssist)
14Cabin Heater Coolant Pump (eAssist) / Secondary Air Injector / Secondary Air Injector with Pressure Sensor
15Motor Generator Unit Coolant Pump (eAssist)
16Run/Crank for eAssist Power Inverter Module
17Not Used
18Sunshade Module, Vehicle Air Purification System, Vented Seats
20Heated Steering Wheel (non eAssist)
23Variable Effort Steering (if equipped) or eAssist Power Inverter Module
29Heated Seat, Left / Power Lumbar
30Heated Seat, Right / Power Pack Cooling Fan (eAssist)
31All-Wheel Drive, Electronic Suspension Control
32Body Control Module 6
33Memory Seat - Front
34Antilock Brake System Valves
35Amplifier
36Adaptive Forward Lighting (AFL) Motors - Battery
37Right High Beam
38Left High Beam
46Cooling Fan Relay
47Six 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
48Fog Lamps
49Right High Intensity Discharge Headlamp
50Left High Intensity Discharge Headlamp
51Horn
52Cluster Run/Crank
53Run/Crank for Inside Rearview Mirror, Rear Vision Camera, Air Quality Sensor, Aero Shutter Motor
54Run/Crank for: Heating, Ventilation and Air Conditioning, Headlamp Switch
55Outside Rearview Mirror, Universal Garage Door Opener, Front Window Switches
56Windshield Washer
60Heated Mirror
62Canister Vent
64Adaptive Forward Lighting (AFL) Module - Battery
65Not Used
66AIR Solenoid (eAssist)
67Fuel Pump Power Module / Chassis Control Module
69Regulated Voltage Control Sensor
70Ultrasonic Parking Assist / Side Blind Zone
71Passive Entry/Passive Start
J-Case Fuses
6Wiper
12Starter
21Rear Power Windows
22Sunroof
24Front Power Windows
25Rear Heated Seats
26Antilock Brake System Pump
27Electric Park Brake
28Rear Window Defogger
41Brake Vacuum Pump
42Cooling Fan K2
43Not Used
44Transmission Auxiliary Oil Pump (eAssist)
45Cooling Fan K1
59AIR Pump
Mini Relays
7Engine Control Module
9Cooling Fan
13Cooling Fan
15Run/Crank
16AIR Pump
17Rear Window Defogger
Micro Relays
1Air Conditioning Compressor Clutch
2Starter
4Wiper Speed
5Wiper Control
6Cabin Heater Coolant Pump (eAssist) / Secondary Air Injector / Secondary Air Injector with Pressure Sensor
10Cooling Fan
14Headlamp Low Beam
Ultra Micro Relays
11Transmission Auxiliary Oil Pump (eAssist)

2016

Instrument Panel Fuse Block

Buick LaCrosse (2016): Instrument panel fuse box diagram

List of fuses in the Instrument Panel Fuse Block (2016)
№Usage
1APO 3
2Body control module 7
3Steering wheel controls backlight
4Radio / Human machine interface / Rear auxiliary audio jack / Front auxiliary audio video jack / Touchpad / Remote media player / Bluray remote media player
5OnStar / Universal hands-free phone
6Power outlet 1
7Power outlet 2
8Body control module 1
9Body control module 4
10Body control module 8
11Front HVAC / Blower
12Passenger seat
13Driver seat
14Diagnostic link connector
15Airbag / Automatic occupant sensing
16Trunk
17HVAC Controller
18Pre-fuse for fuses 4 and 5
19Center stack displays / Head-up display / Right steering wheel control switch / Rear seat infotainment display (eAssist) / HVAC / Center stack displays
20Rear seat entertainment display / Rear seat audio
21Instrument cluster
22Discrete logic ignition switch
23Body control module 3
24Body control module 2
25Rear HVAC / Blower
26AC DC inverter
Relays
R1Trunk relay
R2-
R3Power outlet relay
Engine Compartment Fuse Block

Buick LaCrosse (2016): Engine compartment fuse box diagram

List of fuses in the Engine Compartment Fuse Block (2016)
№Usage
1Transmission control module - battery
2Engine control module - battery
3A/C clutch
5Engine control module / Run/Crank
6Wiper
7Long range radar / Front camera
8Ignition coils - even (6-cylinder engine) / Ignition coils - all (4-cylinder engine)
9Ignition coils - odd (6-cylinder engine)
10Engine control module - switched battery
116-cylinder Engine: post catalytic converter / O2 sensor / Heater / Mass air flow sensor / FlexFuel sensor / Secondary air induction solenoid
12Starter
13Crank for transmission control module / Fuel pump power / Chassis control module (eAssist)
14Cabin heater coolant pump (eAssist) / secondary air injector / Secondary air injector with pressure sensor
15Motor generator unit coolant pump (eAssist)
16Run/Crank for eAssist power inverter module
17-
18Sunshade module / Vehicle air purification system / Ventilated seats
20Heated steering wheel (non eAssist)
21Rear power windows
22Sunroof
23Variable effort steering (if equipped) or eAssist power inverter module
24Front power windows
25Rear heated seats
26Antilock brake system pump
27Electric parking brake
28Rear window defogger
29Heated seat / Left power lumbar
30Heated Seat / Right power pack cooling fan (eAssist)
31AWD / Electronic suspension control
32Body control module 6
33Memory seat - front
34Antilock brake system valves
35Amplifier
36Adaptive forward lighting (AFL) motors-battery
37Right high-beam
38Left high-beam
41Brake vacuum pump
42Cooling fan K2
43-
44Transmission auxiliary oil pump (eAssist)
45Cooling fan K1
46Cooling fan relay
476-cylinder engine: Pre-catalytic converter O2 sensor heater / Canister purge solenoid.
4-cylinder engine: Pre and post catalytic converter O2 sensor Heaters / Canister purge solenoid
48Fog lamps
49Right HID headlamp
50Left HID headlamp
51Horn
52Cluster Run/Crank
53Run/Crank for: rearview mirror / Rear vision camera / Air quality sensor / Aero shutter motor
54Run/Crank for: HVAC / Headlamp switch
55Outside rearview mirror / Universal remote system / Front window switches
56Windshield washer
59AIR pump
60Heated mirror
62Canister vent
64Adaptive forward lighting (AFL) module - battery
65-
66AIR solenoid (eAssist)
67Fuel pump power module / Chassis control module
69Regulated voltage control sensor
70Parking assist / Side blind zone
71Passive entry/Passive start
Relays
1A/C Clutch
2Starter
4Wiper speed
5Wiper control
6Cabin heater coolant pump (eAssist) / Secondary air injector / Secondary air injector with pressure sensor
7Engine control module
9Cooling fan
10Cooling fan
11Transmission auxiliary oil pump (eAssist)
13Cooling fan
14Headlamp low-beam
15Run/Crank
16AIR pump
17Rear window defogger