Buick LaCrosse (2017-2019..) fuses and relays



In this article, we consider the third generation Buick LaCrosse, produced from 2017 to the present. Here you will find fuse box diagrams of Buick LaCrosse 2017, 2018 and 2019, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Buick LaCrosse 2017-2019..

Cigar lighter / power outlet fuses in the Buick LaCrosse are the fuses №F37 (Auxiliary power outlet/Cigar lighter), №43 (Rear accessory power outlet) and №44 (Front accessory power outlet) in the Passenger compartment fuse box.

Passenger compartment fuse box

Fuse Box Location

It is located in the instrument panel, behind the cover.The location of the fuses in the passenger compartment: Buick LaCrosse (2017, 2018, 2019-..)

Fuse box diagram (2017, 2018)

Instrument panel fuse box diagram: Buick LaCrosse (2017, 2018, 2019-..)



Assignment of the fuses and relays in the Passenger compartment (2017, 2018)
F1Left window
F2Right window
F3Not used
F4HVAC blower
F5Battery 2
F6Electric steering column
F7Not used
F8Battery 3
F9Engine control module/Battery
F10Body control module 2 On/Off
F11Not used
F12Not used
F13Not used
F14Not used
F15Transmission control module On/Off
F17Not used
F18Battery 7
F19Not used
F20Battery 1
F21Battery 4
F22Battery 6
F23Electric steering column lock
F242017: Sensing and diagnostic module

2018: Airbag sensing diagnostic module/ Passenger sensing module
F25Diagnostic link
F26Not used
F27AC DC inverter
F28Not used
F29Body control module 8
F30Overhead console
F31Steering wheel control
F32Not used
F34Center gateway module
F35Integrated chassis control module
F37Auxiliary power outlet/Cigar lighter
F40Object detection
F41Body control module 1 On/Off
F432017: Circuit breaker 1

2018: Rear accessory power outlet
F442017: Circuit breaker 2

2018: Front accessory power outlet
K1Not used
K2Retained accessory power
K3Not used
K4Not used

Fuse Box in the engine compartment

Fuse Box Location

The location of the fuses in the engine compartment: Buick LaCrosse (2017, 2018, 2019-..)


Fuse box diagram (2017, 2018)

Under-hood fuse box diagram: Buick LaCrosse (2017, 2018, 2019-..)

Assignment of the fuses and relays in the Engine compartment (2017, 2018)
1Not used
2Not used
3ABS pump
5AC DC inverter
6Rear closure
7Left corner lamp
8Power windows/ Rearview mirror/ Power seats
9Engine boost
102017: Semi-active damping system

2018: Airbag sensing diagnostic module/Passenger sensing module - eAssist
11DC DC Battery 1
12Rear window defogger
13Heated mirrors
14Not used
15Passive entry/ Passive start
16Front wipers
17Passenger power seat
18ABS valve
19Driver power sea
22Right corner lamp
23Auto headlamp leveling
24Not used
26Transmission control module/Ignition
27Instrument panel/ Ignition
28Electronic precision shift/Ignition
29Rear vision camera/ Ventilation
30Malfunction indicator lamp/Shift solenoid
32Canister vent solenoid
33Front heated seats
342017: Rear heated seat/ Vehicle body safety module/Energy storage system fan

2018: BSM (eAssist)/Fan control module/Damping control module (SADS)
35Fog lamps
36Fuel module
38Not used
39Not used
40Steering columnn lock
41Not used
43Heated steering wheel
44Headlamp leveling/ Rear seat ventilation
45Not used
46Engine control module/Ignition
47Not used
48Engine boost/Left cooling fan
49DC DC battery 2/AWD
50Not used
51Not used
52Not used
53Not used
54Not used
55Not used
56Not used
57Transmission auxiliary pump
59High-beam headlamps
60Cooling fan
61Not used
62Not used
63Not used
67Not used
68Not used
69Right HID low-beam headlamps
70Left HID low-beam headlamps
72Starter pinion
74Starter motor
75Engine control module
76Powertrain – off engine
77Not used
79Washer pump
81Transmission control module/ Engine control module
82Not used
83Ignition coils
842017: Powertrain – on engine

2018: Coil
85Engine control module switch 2
86Engine control module switch 1
87SAI reaction pump
89Headlamp washer
91Not used
92TPIM motor generator unit pump
93Headlamp leveling
95SAI reaction solenoid
96Fuel heater
97Not used
99Coolant pump
4AC DC inverter
20Rear defogger
25Front wiper control
37Front wiper speed
42Transmission auxiliary pump
64A/C control
71HID low-beam headlamps
73Starter motor
80Starter pinion
90SAI reaction solenoid
94Headlamp washer
98SAI reaction pump