Buick LaCrosse (2009-2016) fuses and relays

This material discusses in detail the fuse diagrams of the Buick LaCrosse (second generation): 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 release.

Fuses #6 and #7 in the interior fuse box are responsible for the cigarette lighter and 12V power sockets.

In the engine compartment


Located near the battery.


To access, squeeze the three retaining clips on the fuse box cover and lift it straight up.


General view.

Diagram
No. Description Amps
R1 Air Conditioning Compressor Clutch -
R2 Starter Relay -
R3 Not Used -
R4 Front Wiper (Speed Control) -
R5 Front Wiper (On/Off) -
R6 2.4L (LUK -Hybrid): Heater Coolant Pump -
R7 Engine Control Module (ECM) -
R8 Not Used -
R9 Cooling Fan Right (High Speed) -
R10 Cooling Fan (Low Speed) -
R11 2.4L (LUK -Hybrid): Transmission Fluid Pump -
R12 Not Used -
R13 Cooling Fan Left (High Speed) -
R14 Low Beam -
R15 Ignition -
R16 Secondary Air Injection Pump -
R17 Rear Window Defogger Relay -
R18 Horn (Non-Serviceable) -
R19 Windshield Washer Pump (Non-Serviceable) -
R20 Front Fog Lamp (Non-Serviceable) -
R21 High Beam (Non-Serviceable) -
R22 Door Locks (Non-Serviceable) -
R23 2.4L (LUK - Hybrid): Starter/Generator Control Unit (Non-Serviceable) -
1 Transmission Control Solenoid Valve Assembly 15 A
2 Engine Control Module 5 A
3 2014: A/C Compressor Clutch 10 A
4 Empty -
5 Engine Control Module 5 A
6 Windshield Wiper Motor 30 A
7 Empty -
8 3.0L (LF1), 3.6L (LLT, LFX): Ignition Coils, Engine Control Module (ECM) 15 A
9 3.0L (LF1), 3.6L (LLT, LFX), 2.4L (LUK): Ignition Coils, Engine Control Module (ECM) 15 A
10 Engine Control Module (ECM) 20 A
11 3.0L (LF1), 3.6L (LLT, LFX): Heated Oxygen Sensors 10 A
3.6L (LFX): Heated Oxygen Sensors, Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor, Fuel Composition Sensor 10 A
12 Starter Motor 30 A
13 Fuel Pump Flow Control Module, Transmission Control Solenoid Valve Assembly 7,5 A
14 2.4L (LUK - Hybrid): Heater Coolant Pump 5 A
15 2.4L (LUK - Hybrid): Starter/Generator Control Module 10 A
16 3.6L (LLT): Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor 7,5 A
17 Inflatable Restraint Sensing and Diagnostic Module (SDM) 5 A
18 Empty -
19 Empty -
20 Empty -
21 Left Rear/Right Rear Window Switch 30 A
22 Moonroof Sunshade Motor Module and Control Module 30 A
23 Power Steering Control Unit 10 A
2.4L (LUK - Hybrid): Hybrid/EV Battery Pack 7,5 A
24 2014: Window Switch (Left Front/Right Front) 30 A
25 Empty -
26 ABS system 60 A
27 Parking Brake Control Unitr 30 A
28 Rear Window Defogger 40 A
29 Driver's Seat Lumbar Adjuster Switch 15 A
30 2.4L (LUK -Hybrid): Hybrid/EV Battery Pack Cooling Fan 15 A
31 Empty -
32 Body Control Module (BCM) 15 A
33 Heated Seat Control Unit 25 A
Memory Seat Unit 25 A
34 ABS 25 A
35 Audio Amplifier 30 A
36 Adaptive Forward Lighting (AFL) 10 A
37 High Beam Right Headlamp, Right High Beam Solenoid Actuator 10 A
38 High Beam Left Headlamp, Left High Beam Solenoid Actuator 10 A
39 Empty -
40 Empty -
41 Brake Booster Pump Motor 20 A
42 Right Cooling Fan Motor 30 A
43 Empty -
44 2.4L (LUK -Hybrid): Transmission Fluid Pump 30 A
45 Left Cooling Fan Motor 30 A
46 Cooling Fan Low Speed Relay, Left Cooling Fan High Speed Relay 10 A
47 2.4L (LAF), 3.0L (LF1), 2.4L (LUK): Heated Oxygen Sensors, Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor 10 A
3.6L (LLT): Camshaft Position (CMP) Actuators 10 A
3.6L (LFX): Heated Oxygen Sensor, Multifunction Intake Air Sensor, Evaporative Emission Purge Solenoid Valves 10 A
48 Front Fog Lamps 15 A
49 Right Headlamp (Low Beam) 15 A
50 Left Headlamp (Low Beam) 15 A
51 Horn 15 A
52 Instrument Panel Cluster (IPC) 5 A
53 Air Quality Sensor, Brake Booster Vacuum Switch, Inside Rearview Mirror, Rearview Camera, Active Grille Air Shutter Actuator 10 A
54 HVAC Control Unit 5 A
55 Outside Rearview Mirror Switch, Window Switch (Driver/Passenger Side), Garage Door Opener 7,5 A
56 Windshield Washer Fluid Pump 15 A
57 Empty -
58 Empty -
59 Secondary Air Injection Pump 50 A
60 Heated Mirror 7,5 A
61 Empty -
62 Evaporative Emission (EVAP) Canister Vent Solenoid Valve 10 A
63 Empty -
64 Headlamp Control Unit 5 A
65 Empty -
66 Secondary Air Injection Pressure Sensor 15 A
67 Fuel Pump Flow Control Module 20 A
68 Empty -
69 Body Control Module (BCM) 5 A
70 Side Object Sensor (Left/Right), Rear Parking Assist Control Module 5 A
71 Empty -

In the passenger compartment


Located on the driver side, behind the instrument panel.


To access, open the storage door by pulling down at the top. Press in on the sides of the door to release it from the panel. Pull the door toward you to release it from the hinge.


General view.

Diagram
No. Description Amps
R1 Accessory -
R2 Empty -
R3 Rear Compartment Lid Unlatch -
1 Steering Wheel Control Switch 2 A
2 Body Control Module (BCM)  15 A
3 15 A
4 Audio System 15 A
5 Vehicle Communications Interface Module (VCIM) 7,5 A
6
  • Accessory Power Outlet (Center Console #1 and #2) 
  • Buick LaCrosse Cigarette Lighter Fuse
20 A
7 20 A
8 Body Control Module (BCM)  15 A
9 15 A
10 30 A
11 HVAC Control Module 40 A
12 Circuit Breaker: Passenger Seat 25 A
13 Circuit Breaker: Driver Seat, Seat Memory Control Module 25 A
14 Data Link Connector (DLC) 7,5 A
15 Inflatable Restraint Sensing and Diagnostic Module (SDM) 10 A
16 Rear Compartment Lid Latch 10 A
17 HVAC Control Unit 10 A
18 Audio System / Radio 25 A
19 Head Up Display (HUD), Info Display Module, Multimedia Player Interface Module, Radio/HVAC Control 10 A
20 Inflatable Restraint Passenger Presence System (PPS) Module 5 A
21 Instrument Panel Cluster (IPC) 5 A
22 Ignition Switch 2 A
23 Body Control Module (BCM) 15 A
24 15 A
25 Empty -
26 Accessory AC/DC Power Control Unit 30 A
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