Share this

Buick LaCrosse (2009) - 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: 2009

Instrument Panel Fuse Block

The instrument panel fuse block is located on the passenger side of the instrument panel.

Buick LaCrosse - fuse box - instrument panel

Fuses Usage
CHMSL/BKUP Center High-Mounted Stoplamp, Back-up Lamp
CLSTR Cluster
CNSTR Canister Vent
CRUISE Cruise Control
DR/LCK TRUNK Door Locks, Trunk
HAZRD Turn Signal, Hazard
HTD/MIR Heated Mirrors
HTD/SEAT Heated Seats
HVAC Climate Control System
INT/ILLUM Interior Lamps
ONSTAR/ALDL OnStar®, Data Link
PRK/LAMP Park Lamps
PRK/SWTCH Ignition Key Lock
PWR/MIR Power Mirrors
PWR/SEAT Power Seats
PWR/WNDW Power Window
RDO/AMP Radio, Amplifie
RFA/MOD Remote Keyless Entry
S/ROOF Sunroof
STR/WHL/ ILLUM Steering Wheel Controls Illumination


Relays Usage
RAP Retained Accessory Power
PRK/LAMP Park Lamp Relay
R/DEFOG Rear Defogger Relay

Underhood Fuse Block

3.8L V6 engines

Buick LaCrosse - fuse box - engine compartment (3.8L V6 engine)

Mini Fuses Usage
1  Driver Side High-Beam
2 Passenger Side High-Beam
3 Driver Side Low-Beam
4 Passenger Side Low-Beam
5 Windshield Wiper
6 Washer/Regulated Voltage Control
7 Fog Lamps
8 Transmission Control Module
9  Supplemental Inflatable Restraint
10 Auxiliary Power
11  Horn
12 Emission
13 Air Conditioner Clutch
14 Oxygen Sensor
15 Powertrain Control Module
16 Powertrain Control Module, Electronic Throttle Control
17  Electronic Throttle Control
18  Display
19 Antilock Brake Solenoid
20 Fuel Injector
21 Transmission Solenoid
22 Fuel Pump
23 Antilock Brake System
24 Ignition
25 Air Pump
26 Battery Main 1
27 Battery Main 2
28 Battery Main 3
29 Fan 1
30 Battery Main 4
31 Antilock Brake System Motor
32 Fan 2
33 Starter
34 Antilock brake system valves


Mini-Relays Usage
42 Fan 1
43 Fan 3
44 Windshield Wiper High
45 Windshield Wiper
46 Fan 2
48 Crank


Fuse Puller Usage
55 Fuse Puller


Diodes Usage
Air Conditioner Compressor Clutch Diode

5.3L V8 Engine

Buick LaCrosse - fuse box - engine compartment (5.8L V8 engine)

Fuses Usage
A/C CMPRSR Air Conditioning Compressor
ABS Antilock Brake System (ABS)
ABS SOL ABS Solenoid
AIRBAG/ DISPLAY Airbag, Display
AUX PWR Auxiliary Power
BATT 1 Battery 1
BATT 2 Battery 2
BATT 3 Battery 3
BATT 4 Battery 4
ECM IGN Engine Control Module (ECM), Ignition
ECM/TCM ECM, Transmission Control Module (TCM)
EMISSIONS 1 Emissions 1
EMISSIONS 2 Emissions 2
ETC/ECM Electronic Throttle Control, ECM
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
HVAC Climate Control System
INJ 1 Injectors 1
INJ 2 Injectors 2
LT HI BEAM Driver Side High-Beam Headlamps
LT LO BEAM Driver Side Low-Beam Headlamp
RT HI BEAM Passenger Side High-Beam Headlamp
RT LO BEAM Passenger Side Low-Beam Headlamp
STRTR Starter
TRANS Transmission
WPR Windshield Wipers
WSW/RVC1 Windshield Washers, Regulated Voltage Control


Relays Usage
A/C CMPRSR Air Conditioning Compressor
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FAN 3 Cooling Fan 3
HDM Headlamp Driver Module
PWR/TRN Powertrain
STRTR Starter

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

Still have questions or want to supplement the article? Discuss On Telegram

Access the private club

Become a member of and get access to our private telegram bot. Accelerated access and smart search of fuse box & wiring diagrams.
P.S. We never spam!

May Be Useful