Looking for Buick LaCrosse fuse box diagrams ? This article covers the third-generation Buick LaCrosse , available from 2017 , and includes fuse box diagrams for Buick LaCrosse 2017, 2018 and 2019 , along with details about the location of the fuse panels inside the vehicle and a clear explanation of the assignment of each fuse and relay (fuse layout).
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle. To operate the fuses, open the fuse panel by pulling down at the top. Pull the panel toward you to release it from the hinges.
Assignment of the fuses in the passenger compartment
Fuse Data
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No. Description F1 Left window F2 Right window F3 Not used F4 HVAC blower F5 Battery 2 F6 Electric steering column F7 Not used F8 Battery 3 F9 Engine control module/Battery F10 Body control module 2 On/Off F11 Not used F12 Not used F13 Not used F14 Not used F15 Transmission control module On/Off F16 Amplifier F17 Not used F18 Battery 7 F19 Not used F20 Battery 1 F21 Battery 4 F22 Battery 6 F23 Electric steering column lock F24 2017: Sensing and diagnostic module2018: Airbag sensing diagnostic module/ Passenger sensing moduleF25 Diagnostic link F26 Not used F27 AC DC inverter F28 Not used F29 Body control module 8 F30 Overhead console F31 Steering wheel control F32 Not used F33 HVAC F34 Center gateway module F35 Integrated chassis control module F36 Charger F37 Auxiliary power outlet/Cigar lighter F38 OnStar F39 Monitor F40 Object detection F41 Body control module 1 On/Off F42 Radio F43 2017: Circuit breaker 12018: Rear accessory power outletF44 2017: Circuit breaker 22018: Front accessory power outlet
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Assignment of the relays in the passenger compartment
Fuse Data
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No. Description K1 Not used K2 Retained accessory power K3 Not used K4 Not used K5 Logistics
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To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up.
Assignment of the fuses in the engine compartment
Fuse Data
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No. Description 1 Not used 2 Not used 3 ABS pump 5 AC DC inverter 6 Rear closure 7 Left corner lamp 8 Power windows/ Rearview mirror/ Power seats 9 Engine boost 10 2017: Semi-active damping system2018: Airbag sensing diagnostic module/Passenger sensing module – eAssist11 DC DC Battery 1 12 Rear window defogger 13 Heated mirrors 14 Not used 15 Passive entry/ Passive start 16 Front wipers 17 Passenger power seat 18 ABS valve 19 Driver power sea 21 Sunroof 22 Right corner lamp 23 Auto headlamp leveling 24 Not used 26 Transmission control module/Ignition 27 Instrument panel/ Ignition 28 Electronic precision shift/Ignition 29 Rear vision camera/ Ventilation 30 Malfunction indicator lamp/Shift solenoid 32 Canister vent solenoid 33 Front heated seats 34 2017: Rear heated seat/ Vehicle body safety module/Energy storage system fan2018: BSM (eAssist)/Fan control module/Damping control module (SADS)35 Fog lamps 36 Fuel module 38 Not used 39 Not used 40 Steering columnn lock 41 Not used 43 Heated steering wheel 44 Headlamp leveling/ Rear seat ventilation 45 Not used 46 Engine control module/Ignition 47 Not used 48 Engine boost/Left cooling fan 49 DC DC battery 2/AWD 50 Not used 51 Not used 52 Not used 53 Not used 54 Not used 55 Not used 56 Not used 57 Transmission auxiliary pump 58 TRCM 59 High-beam headlamps 60 Cooling fan 61 Not used 62 Not used 63 Not used 65 A/C HEV 67 Not used 68 Not used 69 Right HID low-beam headlamps 70 Left HID low-beam headlamps 72 Starter pinion 74 Starter motor 75 Engine control module 76 Powertrain – off engine 77 Not used 78 Horn 79 Washer pump 81 Transmission control module/ Engine control module 82 Not used 83 Ignition coils 84 2017: Powertrain – on engine2018: Coil85 Engine control module switch 2 86 Engine control module switch 1 87 SAI reaction pump 88 Aeroshutter 89 Headlamp washer 91 Not used 92 TPIM motor generator unit pump 93 Headlamp leveling 95 SAI reaction solenoid 96 Fuel heater 97 Not used 99 Coolant pump
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Assignment of the relays in the engine compartment
Fuse Data
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No. Description 4 2017 – 2018: AC DC inverter2019: Not used20 Rear defogger 25 Front wiper control 31 Run/Crank 37 Front wiper speed 42 Transmission auxiliary pump 64 (A/C) Air conditioning control 66 Powertrain 71 HID low-beam headlamps 73 Starter motor 80 Starter pinion 90 2017 – 2018: SAI reaction solenoid2019: Not used94 Headlamp washer 98 2017 – 2018: SAI reaction pump2019: Not used
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