Buick LaCrosse (2005 – 2007) – fuse box diagram
Year of production: 2005, 2006, 2007
Instrument Panel Fuse Block
The instrument panel fuse block is located on the passenger side of the 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.
| 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 |
| Spare fuses | Usage |
| 49 | Spare |
| 50 | Spare |
| 51 | Spare |
| 52 | Blank |
| 53 | Blank |
| 54 | Blank |
| Fuse Puller | Usage |
| 55 | Fuse Puller |
| Diodes | Usage |
 | Air Conditioner Compressor Clutch Diode |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.