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Buick LaCrosse (2008) - 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: 2008

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


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

Underhood Fuse Block

Some fuses and relays are located in the underhood fuse block on the passenger side of the vehicle in the engine compartment.

3.6L & 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


J-Style fuse Usage
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


Micro-Relays Usage
34 Headlamp High-Beam
35 Headlamp Driver Module
36 Fog Lamp
37 Ignition 1
38 Air Conditioning Compressor
39 Horn
40 Powertrain
41 Fuel Pump


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
diodes Air Conditioner Compressor Clutch Diode

5.3L V8 Engine

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

Fuses Usage
HVAC Climate Control System
AIRBAG/ DISPLAY Airbag, Display
ABS Antilock Brake System
ETC/ECM Electronic Throttle Control, Engine Control Module
A/C CMPRSR Air Conditioning Compressor
INJ 1 Injectors 1
ECM/TCM Engine Control Module, Transmission Control Module
TRANS Transmission
EMISSIONS1 Emissions 1
ABS SOL Antilock Brake Solenoid
ECM IGN Engine Control Module, Ignition
INJ 2 Injectors 2
EMISSIONS2 Emissions 2
WPR Windshield Wipers
AUX PWR Auxiliary Power
WSW/RVC Windshield Washer, Regulated Voltage Control
LT LO BEAM Driver Side Low-Beam Headlamp
RT LO BEAM Passenger Side Low-Beam Headlamp
LT HI BEAM Driver Side High-Beam Headlamp
RT HI BEAM Passenger Side High-Beam Headlamp
BATT 4 Battery 4
BATT 1 Battery 1
STRTR Starter
ABS MTR Antilock Brake System Motor
BATT 3 Battery 3
BATT 2 Battery 2
FAN 2 Cooling Fan 2
FAN 1 Cooling Fan 1


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

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

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