Buick LaCrosse (2009) – fuse box diagram
Year of production: 2009
Instrument Panel Fuse Block
The instrument panel fuse block is located on the passenger side of the 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
| 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
| Fuses | Usage |
| A/C CMPRSR | Air Conditioning Compressor |
| ABS | Antilock Brake System (ABS) |
| ABS MTR | ABS Motor |
| 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 |
| COMPASS | Compass |
| 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 |
| FOGLAMPS | Fog Lamps |
| FUEL/PUMP | Fuel Pump |
| HORN | Horn |
| 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 |
| FUEL/PUMP | Fuel Pump |
| 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.