Buick LaCrosse (2005-2009)

Looking for Buick LaCrosse fuse box diagrams? This article covers the first-generation Buick LaCrosse, available from 2005, and includes fuse box diagrams for Buick LaCrosse 2005, 2006, 2007, 2008 and 2009, along with details about the location of the fuse panels inside the vehicle and a clear explanation of the assignment of each fuse and relay (fuse layout).

Passenger Compartment

Fuse Box Location

The instrument panel fuse block is located on the passenger’s side of the instrument panel. Pull off the cover labeled FUSES to expose the fuse block.

Fuse Box Diagram

Fuses

Assignment of the fuses in the passenger compartment

Fuse Data
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Short-CodeDescription
DR/LCK TRUNKDoor Locks, Trunk
RFA/MODRemote Keyless Entry
PRK/SWTCHIgnition Key Lock
CLSTRCluster
STR/WHL/ ILLUMSteering Wheel Controls Illumination
ONSTAR/ALDLOnStar®, Data Link
INT/ILLUMInterior Lamps
PWR/SEATPower Seat
S/ROOFSunroof
CNSTRCanister Vent
HVACClimate Control System
HAZRDTurn Signal, Hazard
PRK/LAMPPark Lamps
CHMSL/BKUPCenter-High-Mounted Stoplamp/Back-up Lamps
PWR/MIRPower Mirrors
CRUISECruise Control
RDO/AMPRadio, Amplifier
HTD/SEATHeated Seats
HTD/MIRHeated Mirrors
PWR/WNDWPower Window

Relays

Assignment of the relays in the passenger compartment

Fuse Data
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Short-CodeDescription
RAPRetained Accessory Power
PRK/LAMPPark Lamp Relay
R/DEFOGRear Defogger Relay

Engine Compartment

Fuse Box Location

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

Fuse Box Diagram

3.6L and 3.8L V6 engines

Fuses

Assignment of the fuses in the engine compartment (3.6L & 3.8L V6 engines)

Fuse Data
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No.TypeDescription
1Mini FusesDriver Side High-Beam
2Mini FusesPassenger Side High-Beam
3Mini FusesDriver Side Low-Beam
4Mini FusesPassenger Side Low-Beam
5Mini FusesWindshield Wiper
6Mini FusesWasher/Regulated Voltage Control
7Mini FusesFog Lamps
8Mini FusesTransmission Control Module
9Mini FusesSupplemental Inflatable Restraint
10Mini FusesAuxiliary Power
11Mini FusesHorn
12Mini FusesEmission
13Mini FusesAir Conditioner Clutch
14Mini FusesOxygen Sensor
15Mini FusesPowertrain Control Module
16Mini FusesPowertrain Control Module, Electronic Throttle Control
17Mini FusesElectronic Throttle Control
18Mini FusesDisplay
19Mini FusesAntilock Brake Solenoid
20Mini FusesFuel Injector
21Mini FusesTransmission Solenoid
22Mini FusesFuel Pump
23Mini FusesAntilock Brake System
24Mini FusesIgnition
25J-Style FuseAir Pump
26J-Style FuseBattery Main 1
27J-Style FuseBattery Main 2
28J-Style FuseBattery Main 3
29J-Style FuseFan 1
30J-Style FuseBattery Main 4
31J-Style FuseAntilock Brake System Motor
32J-Style FuseFan 2
33J-Style FuseStarter
49-54SpareSpare fuses
55ToolFuse Puller
diodeDiodeAir Conditioner Compressor Clutch Diode

Relays

Assignment of the relays in the engine compartment (3.6L & 3.8L V6 engines)

Fuse Data
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No.TypeDescription
34Micro-RelaysHeadlamp High-Beam
35Micro-RelaysHeadlamp Driver Module
36Micro-RelaysFog Lamp
37Micro-RelaysIgnition 1
38Micro-RelaysAir Conditioning Compressor
39Micro-RelaysHorn
40Micro-RelaysPowertrain
41Micro-RelaysFuel Pump
42Mini-RelaysFan 1
43Mini-RelaysFan 3
44Mini-RelaysWindshield Wiper High
45Mini-RelaysWindshield Wiper
46Mini-RelaysFan 2
48Mini-RelaysCrank

5.3L V8 Engine

Fuses

Assignment of the fuses in the engine compartment (5.3L V8 Engine)

Fuse Data
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Short-CodeDescription
HVACClimate Control System
FUEL/PUMPFuel Pump
AIRBAG/ DISPLAYAirbag, Display
COMPASSCompass
ABSAntilock Brake System
ETC/ECMElectronic Throttle Control, Engine Control Module
A/C CMPRSRAir Conditioning Compressor
INJ 1Injectors 1
ECM/TCMEngine Control Module, Transmission Control Module
TRANSTransmission
EMISSIONS1Emissions 1
ABS SOLAntilock Brake Solenoid
ECM IGNEngine Control Module, Ignition
INJ 2Injectors 2
EMISSIONS2Emissions 2
WPRWindshield Wipers
AUX PWRAuxiliary Power
WSW/RVCWindshield Washer, Regulated Voltage Control
LT LO BEAMDriver Side Low-Beam Headlamp
RT LO BEAMPassenger Side Low-Beam Headlamp
FOG LAMPSFog Lamps
LT HI BEAMDriver Side High-Beam Headlamp
HORNHorn
RT HI BEAMPassenger Side High-Beam Headlamp
BATT 4Battery 4
BATT 1Battery 1
STRTRStarter
ABS MTRAntilock Brake System Motor
BATT 3Battery 3
BATT 2Battery 2
FAN 2Cooling Fan 2
FAN 1Cooling Fan 1

Relays

Assignment of the relays in the engine compartment (5.3L V8 Engine)

Fuse Data
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Short-CodeDescription
FUEL/PUMPFuel Pump
A/C CMPRSRAir Conditioning Compressor
PWR/TRNPowertrain
STRTRStarter
FAN 1Cooling Fan 1
FAN 2Cooling Fan 2
FAN 3Cooling Fan 3
HDMHeadlamp Driver Module

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