Buick LaCrosse 2012 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is located in the instrument panel, on the driver side of the vehicle.
Engine compartment fuse box location:
Luggage compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Steering Wheel Controls Backlight |
| 2 | Body Control Module 7 |
| 3 | Body Control Module 5 |
| 4 | Radio |
| 5 | OnStar |
| 6 | Power Outlet 1 |
| 7 | Power Outlet 2 |
| 8 | Body Control Module 1 |
| 9 | Body Control Module 4 |
| 10 | Body Control Module 8 (J‐Case Fuse) |
| 11 | Front Heater Ventilation Air Conditioning/Blower (J‐Case Fuse) |
| 12 | Passenger Seat (Circuit Breaker) |
| 13 | Driver Seat (Circuit Breaker) |
| 14 | Diagnostic Link Connector |
| 15 | Airbag |
| 16 | Trunk |
| 17 | Heater Ventilation Air Conditioning Controller |
| 18 | Pre‐Fuse for Fuses 4 and 5 |
| 19 | Infotainment and Center Stack Displays, Head‐Up Display, Preferred Device Interface Module, Rear Seat Infotainment (eAssist) |
| 20 | Automatic Occupant Sensing |
| 21 | Instrument Panel Cluster |
| 22 | Discrete Logic Ignition Switch |
| 23 | Body Control Module 3 |
| 24 | Body Control Module 2 |
| 25 | Rear Heater Ventilation Air Conditioning/Blower |
| 26 | AC/DC Inverter |
| Relays | |
| R1 | Trunk Relay |
| R2 | Not Used |
| R3 | Power Outlet Relay |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| Mini Fuses | |
| 1 | Transmission Control Module - Battery |
| 2 | Engine Control Module Battery |
| 3 | Air Conditioning Compressor Clutch |
| 5 | Engine Control Module Run/Crank |
| 8 | Ignition Coils - Even (Six Cylinder Engine), Ignition Coils - All (Four Cylinder Engine |
| 9 | Ignition Coils - Odd (Six Cylinder Engine) |
| 10 | Engine Control Module - Switched Battery (from Engine Control Module Relay) |
| 11 | Six Cylinder Engine: Post Catalytic Converter Oxygen Sensor Heater, Mass Air Flow Sensor, Flex Fuel Sensor |
| 13 | Run/Crank for Transmission Control Module and Fuel System Control Module |
| 14 | Cabin Heater Coolant Pump (eAssist), Motor Generator Unit Coolant Pump (eAssist) |
| 16 | Run/Crank for eAssist Power Inverter Module |
| 17 | Airbag Module - Run/Crank |
| 18 | Vented Seats (eAssist) |
| 23 | Variable Effort Steering (if equipped) or eAssist Power Inverter Module |
| 29 | Power Lumbar, Left |
| 30 | Power Lumbar, Right or Power Pack Cooling Fan (eAssist) |
| 31 | Passive Entry/ Passive Start Module - Battery 1 (eAssist) |
| 32 | Body Control Module 6 |
| 33 | Heated Seat - Front |
| 34 | Antilock Brake System Valves |
| 35 | Amplifier |
| 36 | Adaptive Forward Lighting (AFL) Motors - Battery |
| 37 | Right High Beam |
| 38 | Left High Beam |
| 46 | Cooling Fan Relay |
| 47 | Six Cylinder Engine: Pre Catalytic Converter Oxygen Sensor Heater, Canister Purge Solenoid. Four Cylinder Engine: Pre and Post Catalytic Converter Oxygen Sensor Heaters, Canister Purge Solenoid, Mass Air Flow Sensor. |
| 48 | Fog Lamps |
| 49 | Right High Intensity Discharge Headlamp |
| 50 | Left High Intensity Discharge Headlamp |
| 51 | Horn |
| 52 | Cluster Run/Crank |
| 53 | Run/Crank for Inside Rearview Mirror, Rear Vision Camera |
| 54 | Run/Crank for: Heating, Ventilation and Air Conditioning |
| 55 | Outside Rearview Mirror, Universal Garage Door Opener, Front Window Switches |
| 56 | Windshield Washer |
| 60 | Heated Mirror |
| 62 | Canister Vent |
| 64 | Adaptive Forward Lighting (AFL) Module - Battery |
| 65 | Not Used |
| 66 | AIR Solenoid (eAssist) |
| 67 | Fuel System Control Module |
| 69 | Regulated Voltage Control Sensor |
| 70 | Ultrasonic Parking Assist/Side Blind Zone |
| J-Case Fuses | |
| 6 | Wiper |
| 12 | Starter |
| 21 | Rear Power Windows |
| 22 | Sunroof |
| 24 | Front Power Windows |
| 25 | Passive Entry/ Passive Start Module - Battery 2 (eAssist) |
| 26 | Antilock Brake System Pump |
| 27 | Electric Park Brake |
| 28 | Rear Window Defogger |
| 41 | Brake Vacuum Pump |
| 42 | Cooling Fan K2 |
| 43 | Not Used |
| 44 | Transmission Auxiliary Oil Pump (eAssist) |
| 45 | Cooling Fan K1 |
| 59 | AIR Pump |
| Mini Relays | |
| 7 | Engine Control Module |
| 9 | Cooling Fan |
| 13 | Cooling Fan |
| 15 | Run / Crank |
| 16 | AIR Pump |
| 17 | Rear Window Defogger |
| Micro Relays | |
| 1 | Air Conditioning Compressor Clutch |
| 2 | Starter |
| 4 | Wiper Speed |
| 5 | Wiper Control |
| 6 | Cabin Heater Coolant Pump (eAssist) |
| 10 | Cooling Fan |
| 14 | Headlamp Low Beam |
| Ultra Micro Relays | |
| 11 | Transmission Auxiliary Oil Pump (eAssist) |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| Mini Fuses | |
| 5 | Not Used |
| 6 | Heated Steering Wheel - Run/Crank (without eAssist) |
| 7 | Not Used |
| 8 | Not Used |
| 12 | Not Used |
| 15 | Not Used |
| 16 | Not Used |
| 17 | Not Used |
| 18 | Passive Entry/ Passive Start Module - Battery 1 (without eAssist) |
| 19 | Not Used |
| 20 | Run/Crank for Rear Sunshade (without eAssist), Ventilated Seats (without eAssist) |
| 21 | Not Used |
| 22 | Not Used |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Not Used |
| 26 | Not Used |
| 27 | Not Used |
| 28 | Not Used |
| 29 | Not Used |
| 30 | Not Used |
| 31 | Electronic Suspension Control (without eAssist) |
| 32 | Rear Seat Infotainment (without eAssist) |
| 33 | All‐Wheel Drive (without eAssist) |
| J‐Case Fuses | |
| 1 | Not Used |
| 2 | Not Used |
| 3 | Not Used |
| 4 | Not Used |
| 9 | Not Used |
| 10 | Not Used |
| 11 | Not Used |
| 13 | Not Used |
| 14 | Not Used |
| 34 | Not Used |
| 35 | Passive Entry/ Passive Start Module - Battery 2 (without eAssist) |
| 36 | Not Used |
| 37 | Not Used |
| Relays | |
| K1 | Not Used |
| K2 | Run/Crank Relay for Seat Ventilation (without eAssist), Sunshade (without eAssist) |
| K3 | Run Relay for Heated Steering Wheel (without eAssist) |
| K4 | Not Used |
