Fuses and relays Buick LaCrosse (2005-2009)

This material discusses in detail the fuse diagrams of the Buick LaCrosse (first generation): 2005, 2006, 2007, 2008, 2009 release.

Fuse #10 in the engine bay fuse box is responsible for the 12V auxilary power socket and cigarette lighter.

In the engine compartment

Located on the passenger side of the engine bay.

5.3L V8 Engine

This type of fuse box is installed on the GM LS2 modifications.

Name Description
FUEL/PUMP Fuel Pump Relay
A/C CMPRSR Air Conditioning Compressor
PWR/TRN Powertrain relay
STRTR Starter relay
FAN 1 Cooling Fan 1 relay
FAN 2 Cooling Fan 2 relay
FAN 3 Cooling Fan 3 relay
HDM Headlamp Driver Module relay
LT HI BEAM High-Beam Headlamp (Driver Side)
RT HI BEAM High-Beam Headlamp (Passenger Side)
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
HVAC Climate Control Unit
FUEL/PUMP Buick LaCrosse Fuel Pump Fuse
AIRBAG/ DISPLAY Airbag module, Display
COMPASS Compass module
ABS Antilock Brake System (ABS)
ETC/ECM Electronic Throttle Control Unit, Engine Control Module (ECM)
A/C CMPRSR Air Conditioning
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 Low-Beam Headlamp (Driver Side)
RT LO BEAM Low-Beam Headlamp (Passenger Side)

3.6L and 3.8L V6 engines

General view of the fuse box.

No. Description
Relays type "Micro"
micR34 High-Beam Headlamp
micR35 Driver Module Headlamp
micR36 Fog Lamp
micR37 Ignition 1
micR38 Air Conditioning Compressor
micR39 Horn
micR40 Powertrain
micR41 Buick LaCrosse Fuel Pump Relay
Relays type "Mini"
minR42 Fan 1
minR43 Fan 3
minR44 Windshield Wiper High
minR45 Windshield Wiper Relay
minR46 Fan 2
minR48 Crank Relay
49-54 Reserve
55 Puller
diode Air Conditioner Compressor Clutch Diode
1 High-Beam (Driver Side)
2 High-Beam (Passenger Side)
3 Low-Beam (Driver Side)
4 Low-Beam (Passenger Side)
5 Windshield Wiper
6 Washer/Regulated Voltage Control
7 Fog Lamps
8 Transmission Control Module (TCM)
9 Supplemental Inflatable Restraint
  • Auxiliary Power Socket
  • Buick LaCrosse Cigarette Lighter Fuse
11 Horn
12 Emission
13 Air Conditioner Clutch
14 Oxygen Sensor
15 Powertrain Control Module (PCM)
16 Powertrain Control Module, Electronic Throttle Control
17 Electronic Throttle Control
18 Display
19 Antilock Brake Solenoid (ABS)
20 Fuel Injector
21 Transmission Solenoid
22 Buick LaCrosse Fuel Pump Fuse
23 Antilock Brake System
24 Ignition
Fuse type J-Style
J25 Air Pump
J26 Battery Main 1
J27 Battery Main 2
J28 Battery Main 3
J29 Radiator Fan 1
J30 Battery Main 4
J31 Antilock Brake System Motor
J32 Fan 2
J33 Starter

In the passenger compartment

Fuse box located on the passenger's side of the instrument panel, behind the plastic cover.

Access example.

General view (front side).

General view (back side).

Name Decription
RAP Retained Accessory Power Relay
PRK/LAMP Park Lamp Relay
R/DEFOG Rear Defogger Relay
PWR/SEAT Power Seat
S/ROOF Moonroof
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 System
RDO/AMP Radio, Audio Amplifier
HTD/SEAT Heated Seats Module
HTD/MIR Heated Mirrors Module
PWR/WNDW Power Window Module
DR/LCK TRUNK Door Locks, Trunk
RFA/MOD Remote Keyless Entry System
PRK/SWTCH Ignition Key Lock
CLSTR Cluster
STR/WHL/ ILLUM Steering Wheel Controls Illumination
ONSTAR/ALDL OnStar® System, Data Link
INT/ILLUM Interior Lamps
Related fuse diagrams
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