Buick Lucerne (2008 – 2011) – fuse box diagram
Year of production: 2008, 2009, 2010, 2011
Engine compartment
The underhood fuse block is located on the passenger side of the engine compartment.
| Fuses | Usage |
| 1 | Engine Control Module (ECM), Crank |
| 2 | Fuel Injectors Odd |
| 3 | Fuel Injectors Even |
| 4 | Air Conditioning Clutch |
| 5 | Air Injection Reactor (AIR) Solenoid |
| 6 | Oxygen Sensor |
| 7 | Emission Device |
| 8 | Transmission, Ignition 1 |
| 9 | Engine Control Module (ECM), Powertrain Control Module (PCM) |
| 10 | Climate Control System, Instrument Panel Cluster Ignition 1 |
| 11 | Airbag System |
| 12 | Horn |
| 13 | Windshield Wiper |
| 14 | Fog Lamps |
| 15 | Right High-Beam Headlamp |
| 16 | Left High-Beam Headlamp |
| 17 | Left Low-Beam Headlamp |
| 18 | Right Low-Beam Headlamp |
| 19 | Windshield Washer Pump Motor |
| 20 | Left Front Cornering Lamp |
| 21 | Right Front Cornering Lamp |
| 22 | Air Pump (J-Case) |
| 23 | Antilock Brake System (ABS) (J-Case) |
| 24 | Starter (J-Case) |
| 25 | Antilock Brake System (ABS) Motor (J-Case |
| 26 | Cooling Fan 2 (J-Case) |
| 27 | Cooling Fan 1 (J-Case) |
| Relays | Usage |
| 29 | Powertrain |
| 30 | Starter |
| 31 | Cooling Fan 2 |
| 32 | Cooling Fan 3 |
| 33 | Cooling Fan 1 |
| 34 | Air Conditioning Clutch |
| 35 | Air Injection Reactor (AIR) Solenoid |
| 36 | Ignition |
| 37 | Air Pump |
Rear Underseat Fuse Block
The rear fuse block is located under the rear seat on the driver side. The rear seat cushion must be removed to access the rear fuse block.
| Fuses | Usage |
| 1 | Fuel Pump |
| 2 | Left Park Lamp |
| 3 | Not Used |
| 4 | Right Park Lamp |
| 5 | Engine Control Module (ECM)/ Transmission Control Module (TCM) |
| 6 | Memory Module |
| 7 | Not Used |
| 8 | Steering Wheel Illumination |
| 9 | Front Heated/Cooled Seat Module |
| 10 | Run 2 – Heated/Cooled Seats |
| 11 | Not Used |
| 12 | RPA Module |
| 13 | PASS-Key® III System |
| 14 | Unlock/Lock Module |
| 15 | Magnetic Ride Control |
| 16 | Daytime Running Lamps (DRL) |
| 17 | Sunroof |
| 18 | Body Control Module (BCM) Dim |
| 19 | Body Control Module (BCM) |
| 20 | Run 1-Heated Steering Wheel |
| 21 | Ignition Switch |
| 22 | Driver Door Module |
| 23 | Not Used |
| 24 | Electronic Leveling Control Module |
| 25 | Body Control Module (Left Turn Signal) |
| 26 | Cigarette Lighter, Auxiliary Power Outlet |
| 27 | Not Used |
| 28 | Retained Accessory Power 1 (RAP) |
| 29 | Passenger Door Module |
| 30 | Sensing and Diagnostic Module |
| 31 | Accessory Power Outlets |
| 32 | Body Control Module (BCM) (Inadvertent) |
| 33 | Retained Accessory Power 2 (RAP) |
| 34 | CanisterVent Solenoid |
| 35 | Body Control Module (Courtesy) |
| 36 | Body Control Module (Right Turn Signal) |
| 37 | Trunk Release |
| 38 | Amplifier, Radio |
| 39 | Body Control Module (CHMSL) |
| 40 | Body Control Module |
| 41 | Not Used |
| 42 | OnStar® Module |
| 43 | Body Modules |
| 44 | Radio |
| 45 | Not Used |
| 46 | Rear Defogger (J-Case) |
| 47 | Electronic Leveling Control Compressor (J-Case) |
| 48 | Blower (J-Case) |
| 49 | Not Used |
| Resistor | Usage |
| 50 | Terminating Resistor |
| Relays | Usage |
| 51 | Not Used |
| 52 | Rear Defogger |
| 53 | Electronic Leveling Control Compressor |
| 58 | Park Lamps |
| 59 | Fuel Pump |
| 60 | Not Used |
| 61 | Not Used |
| 62 | Unlock |
| 63 | Lock |
| 64 | Run |
| 65 | Daytime Running Lamps |
| 66 | Not Used |
| 67 | Trunk Release |
| 68 | Not Used |
| 69 | Not Used |
| 70 | Retained Accessory Power (RAP) |
| Circuit Breaker | Usage |
| 54 | Right Front Seat |
| 55 | Left Front Power Seat |
| 56 | Power Windows |
| 57 | Power Tilt Steering Wheel |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.